BrowseSAP Cloud Application Programming Model
Everything in CAP
159 of 1047
Domain
Signals
Content: 3
More
Group by: Capability
EntryBySignalsLast activity
Error handlingSAP and community
Messaging System for Transferring Error, Warning, and Information Messages from OData V4 Services to HTTP Client ApplicationsMessaging System for Transferring Error, Warning, and Information Messages from OData V4 Services to HTTP Client ApplicationsGetting a message out of a CAP service and onto a Fiori elements object page in a draft scenario — errors, warnings and information, each of which the UI treats differently. Co-written with one of the people on the OData side, and it spends its length on the message container rather than on the handler that fills it.arley-triana-morin, published 2022-08-11
Messaging System for Transferring Error, Warning, and Information Messages from OData V4 Services to HTTP Client Applications
OData changed in @cap-js-community/odata-v2-adapter 1.10.0, 2023-04-05. Affects A recipe, Runnable code.
SAP Cloud Application Programming Model（CAP）：カスタムロジックの実装 – Part 2SAP Cloud Application Programming Model（CAP）：カスタムロジックの実装 – Part 2A walkthrough of implementing custom logic in a CAP Node.js service for the capire bookshop sample, registering before, on and after handlers around the generated CRUD service for its Books and Orders entities. The before handler validates an incoming order's amount and runs a transactional CQN UPDATE to decrement stock, raising a 400 or 409 through req.error when the amount is invalid or no rows match; an after handler on READ appends a discount note to overstocked books.rasai, published 2021-01-01
GraphQLSAP only
CAP: GraphQL as new protocolCAP: GraphQL as new protocolWritten days after @cap-js/graphql appeared, by somebody who went looking for it — an introduction to GraphQL alongside what the adapter actually does to a CAP service. The first outside account of the capability, and still one of very few.jhodel18, published 2023-03-18
CAP: GraphQL as new protocol
@cap-js/graphql has been through 11 major lines since this was published, most recently 0.12 (2025-05), 0.13 (2025-07), 0.14 (2025-10). Affects Runnable code.
SAP CAP function and action with Unstructured/Dynamic Type Input/OutputSAP CAP function and action with Unstructured/Dynamic Type Input/OutputA CAP action or function can take or return an unstructured type: annotate the service @protocol: 'rest', declare the parameter or return value as @open type object {}, and a handler shapes the payload however a given request needs, shown here with a bound action and a function that returns a different structure per input. The text states plainly that OData V4 and GraphQL services require a fixed structure for action and function parameters, so the dynamic type works only over CAP's REST protocol.published 2022-12-08
SAP CAPv7 - Node.js Highlights and ExperiencesSAP CAPv7 - Node.js Highlights and ExperiencesAn account of upgrading a 100+ table CAP Node.js project from v6 to v7, working through breaking changes in @sap/cds 7: event handlers now always receive an array, service paths move under /odata/v4/... unless serve_on_root is set, and cds-serve replaces cds run. It goes deepest on the GraphQL plugin, @cap-js/graphql: the /graphql endpoint it serves, Composition results wrapped in a nodes connection, and offset-based pagination reached through OData's top and skip rather than GraphQL's own limit and offset.published 2023-08-03
SAP GraphQL in CAPm (node.js)SAP GraphQL in CAPm (node.js)Adding the GraphQL protocol adapter to a CAP project when it was new — an entity, some data, the feature switched on, and a check that it answers. Short, and it is the earliest account here of CAP speaking something other than OData.enric101, published 2021-11-29
Metadata publishingSAP and community
Importing an external data model using CDS Graphical Modeler for Visual Studio CodeImporting an external data model using CDS Graphical Modeler for Visual Studio CodeWalks through the CDS Graphical Modeler for Visual Studio Code: creating a "Customers" entity, importing an external OData model from an edmx file into the CDS model, and drawing a managed association from the new entity to an entity from the imported namespace. The import happens through the modeler's GUI rather than the cds import command, and the imported edmx becomes a CDS file the modeler can open directly.Xiao-fei_Song, published 2022-05-09
Importing external edmx files to your CAP project using the CDS Graphical ModelerImporting external edmx files to your CAP project using the CDS Graphical ModelerAn EDMX downloaded from the API hub — API_BUSINESS_PARTNER in the example — imported into the CDS model and its entities exposed as projections, done through the graphical modeller rather than cds import. Barely a page long.Xiao-fei_Song, published 2021-05-19
ODataSAP and community
#BTP #SAPCAP: Quirky Nuggets (N03-N04)#BTP #SAPCAP: Quirky Nuggets (N03-N04)Two unrelated findings in one post, which is the format of the series: the OData operators tried against a CAP service — with a schema of deliberately awkward types to try them on — and undeploying database artifacts, which is the half people hit in anger. Numbered N03 and N04 of a run that continues either side.Ajit_K_Panda, published 2023-06-05
#BTP #SAPCAP: Quirky Nuggets (N03-N04)
Deployment changed in @sap/cds-dk 8.9.0, 2025-03-31. Affects A recipe, Runnable code.
Create a Business Service using CDS, Node.js, SQLite and a OData serviceCreate a Business Service using CDS, Node.js, SQLite and a OData serviceThe stack at its smallest — CDS, Node, SQLite, an OData service — worked through at length. Nothing cloud in it, which is the point: it is the shape of a CAP service before any of the platform arrives.raybanton, published 2021-07-12
Create a Business Service using CDS, Node.js, SQLite and a OData service
Database connectors has changed twice since this was published, most recently in @sap/cds 10.1.0, 2026-09-07. Affects A recipe, Runnable code.
Custom Functions in OData V4 – SAP Cloud Application Programming ModelCustom Functions in OData V4 – SAP Cloud Application Programming ModelFunctions rather than actions, and the distinction is where it starts: a function must return data and must never change any, so it is the read-only half of custom operations. Then how to declare and implement one on a CAP service.Roopa_N, published 2021-04-28
Custom Functions in OData V4 – SAP Cloud Application Programming Model
OData changed in @cap-js-community/odata-v2-adapter 1.10.0, 2023-04-05. Affects A recipe.
Extend SAP SuccessFactors on SAP BTP with CAP - Create the CAP ServiceExtend SAP SuccessFactors on SAP BTP with CAP - Create the CAP ServiceWalks through writing a service definition in SAP Business Application Studio that projects entities from an existing CDS model: one entity gets @odata.draft.enabled because Fiori Elements only shows CRUD actions on a draft-enabled entity, and a read-only projection of an already-imported SuccessFactors OData entity fails with the generic handlers because the call is delegated to the remote service, so a custom handler is needed. Running cds watch then serves the entities, drafts and $metadata at the declared service path.published 2022-03-23
Messaging System for Transferring Error, Warning, and Information Messages from OData V4 Services to HTTP Client ApplicationsMessaging System for Transferring Error, Warning, and Information Messages from OData V4 Services to HTTP Client ApplicationsGetting a message out of a CAP service and onto a Fiori elements object page in a draft scenario — errors, warnings and information, each of which the UI treats differently. Co-written with one of the people on the OData side, and it spends its length on the message container rather than on the handler that fills it.arley-triana-morin, published 2022-08-11
Messaging System for Transferring Error, Warning, and Information Messages from OData V4 Services to HTTP Client Applications
OData changed in @cap-js-community/odata-v2-adapter 1.10.0, 2023-04-05. Affects A recipe, Runnable code.
SAP BTP SDK for iOS & CAP with OData V4 supportSAP BTP SDK for iOS & CAP with OData V4 supportThe iOS SDK gaining OData V4, which until then made connecting a native app to a CAP service awkward — CAP defaults to v4 and the SDK did not speak it. Short, and it marks the date that stopped being a problem.KRiedelsheimer, published 2021-04-21
SAP CAP Adapter to expose OData as custom REST ServiceSAP CAP Adapter to expose OData as custom REST ServiceWalks through consuming an external OData V2 service in a CAP project — cds import converts the Northwind service's EDMX into a CSN and cds.connect.to wires up the remote proxy — then re-exposing it as plain REST with the @protocol:'rest' annotation instead of OData's own envelope. Shows two ways to reshape the response, renaming and dropping fields in a CDS projection or rewriting the returned objects in a custom service handler, and remaps ?pageSize and ?offset onto OData's $top and $skip in that same handler.Former Member, published 2021-09-15
SAP CAP function and action with Unstructured/Dynamic Type Input/OutputSAP CAP function and action with Unstructured/Dynamic Type Input/OutputA CAP action or function can take or return an unstructured type: annotate the service @protocol: 'rest', declare the parameter or return value as @open type object {}, and a handler shapes the payload however a given request needs, shown here with a bound action and a function that returns a different structure per input. The text states plainly that OData V4 and GraphQL services require a fixed structure for action and function parameters, so the dynamic type works only over CAP's REST protocol.published 2022-12-08
The End2End Journey: Advocates Service – CAP Service, OData V2/4 & REST in One single ProjectThe End2End Journey: Advocates Service – CAP Service, OData V2/4 & REST in One single ProjectOne CAP service exposing OData V2, OData V4 and REST at the same time, which is unusual enough to be worth the read on its own. Part of an end-to-end series, deployed on Cloud Foundry against HANA Cloud, so the protocol question sits inside a whole application rather than a snippet.KRiedelsheimer, published 2021-05-06
The End2End Journey: Advocates Service – CAP Service, OData V2/4 & REST in One single Project
OData changed in @cap-js-community/odata-v2-adapter 1.10.0, 2023-04-05. Affects A recipe, Runnable code.
OpenAPISAP and community
Edge Integration Cell : Design, deploy and manage APIsEdge Integration Cell : Design, deploy and manage APIsWalks through creating an API artifact in API Management on the customer-managed Edge Integration Cell runtime, including the option to generate the artifact by importing an OpenAPI specification rather than from a URL or by hand. It then attaches an Authentication policy and a Quota step capped at four calls per minute, deploys, and shows both the resulting 401 and the quota-breach error in the Monitor logs. The author frames it as the first of a series on Edge Integration Cell's policies.published 2023-11-15
Invoke OpenAPI-documented APIs remotely with SAP Cloud Application Programming ModelInvoke OpenAPI-documented APIs remotely with SAP Cloud Application Programming ModelThe other direction: consuming an API described by an OpenAPI document from CAP, rather than publishing one. Worth pairing with the plugin entries here, which all serve the outbound half.wittro, published 2022-08-30
Invoke OpenAPI-documented APIs remotely with SAP Cloud Application Programming Model
Destinations changed in @sap-cloud-sdk/connectivity 4.0.0, 2025-03-04. Affects Runnable code.
Part 2 – Empowering SAP BTP CAP Services through Open API Spec and Annotations for Effective Communication, Collaboration and GovernancePart 2 – Empowering SAP BTP CAP Services through Open API Spec and Annotations for Effective Communication, Collaboration and GovernanceWalks through generating an OpenAPI specification for a Node.js CAP service: installing cds-swagger-ui-express, bootstrapping it in server.js, a sample CDS data model with associations and compositions, and the YUML diagram and endpoint details the Open API Preview renders in Business Application Studio. Also shows gating the Swagger UI behind a user-defined environment variable so it is served in development and QA subaccounts but excluded from the production deployment on Cloud Foundry. Second of a three-part series; the first covers the concepts and the third goes deeper into annotations.mohit_bansal3, published 2023-05-24
Swagger UI | SAP BTP Extension Generators | Hands-on Video TutorialsSwagger UI | SAP BTP Extension Generators | Hands-on Video TutorialsA blog post wrapped around a video playlist from the SAP HANA Academy — Swagger UI for CDS, added to the BTP extension generator series. The written half is an ingredients list and a table of contents; the substance is in the recordings.dvankempen, published 2021-07-09
Pagination and streamingSAP only
[Part – 2] Enrich CAP based Services with Behaviors using Annotations[Part – 2] Enrich CAP based Services with Behaviors using AnnotationsThe second half of a two-part walkthrough of CAP's behavioral annotations, following on from access control and input validation in the first part. This post works through @cds.autoexpose, @cds.api.ignore, @cds.persistence.exists/skip, @cds.on.insert/@cds.on.update and the @odata.Type/@odata.singleton mapping overrides, all shaping how a CDS model is projected into a service, which is data modelling. Alongside these it covers @cds.query.limit for default and maximum page sizes (pagination and streaming), @odata.etag with exclusive and shared locks for optimistic concurrency (concurrency control), and @cds.search for scoping $search to chosen elements (search), each with a CDS code example.published 2023-01-29
WebSocketCommunity only
CAP WebSocketsCAP WebSocketsThe early one, from 2021, before an adapter existed to make it ordinary. Read for what the problem looked like when it had to be solved by hand.vvdries, published 2021-01-26
SAP Event Mesh: S4 HANA On-Prem and SAP CI(BTP IS) through WebSocket and WebhooksSAP Event Mesh: S4 HANA On-Prem and SAP CI(BTP IS) through WebSocket and WebhooksA step-by-step walkthrough of wiring Event Mesh to publish and consume events between an on-premise S/4HANA system and Cloud Integration, contrasting persistent queues (one subscriber, kept until consumed) against unpersisted topics, and WebSocket's AMQP transport against webhook delivery for the same queue. Two tested findings support it: a queue consumer running in continuous consumption mode receives a message ahead of a webhook on the same topic, and a message stays queued and is retried (almost 8770 times in under a minute, in the author's test) until the consumer processes it successfully.FarooqAhmed, published 2023-10-03
Analytical queriesSAP only
Building an Analytical List Page with CAP OData V4Building an Analytical List Page with CAP OData V4The annotations a CAP OData V4 service needs before an Analytical List Page will render — the write-up behind the cap-alp sample indexed here. Candid about its provenance: the author credits a GitHub repository she found the approach in, and notes that the repository is no longer available, which is the whole argument for indexing the reasoning rather than only linking the code.published 2023-06-12
Building an Analytical List Page with CAP OData V4
cap-alp: no published releases, repository quiet for 24 months. Affects A recipe, Runnable code.
Discovering SAP Fiori Elements Analytical functions by implementing SAP Support Message ReportingDiscovering SAP Fiori Elements Analytical functions by implementing SAP Support Message ReportingAnalytical annotations learned by building something the author wanted — a view over SAP support messages — after a conversation in February 2021 that the post dates precisely. Exploration written up as exploration.published 2021-03-14
Empowering Your Data Analytics with GPT-3 and SAP CAP IntegrationEmpowering Your Data Analytics with GPT-3 and SAP CAP IntegrationFree text in, SQL out, answer back in a sentence — the model writes the query, CAP runs it, and the model turns the rows into prose. Written in the GPT-3 window, so the model access has dated, but the three-step shape has not, and it is a different bet from retrieval: nothing is embedded, the schema is the context.Former Member, published 2023-03-10
Fiori Elements Analytical Table with CAP: Does it work with V2 and V4?Fiori Elements Analytical Table with CAP: Does it work with V2 and V4?A question in the title and an answer in the post, with the boundary drawn carefully: this is an analytical table inside a List Report, not the Analytical List Page, and the two protocol versions do not behave the same.published 2023-04-03
Fiori Elements Analytical Table with CAP: Does it work with V2 and V4?
Fiori annotations changed in @sap/cds-dk 9.6.0, 2025-12-17. Affects Runnable code.
Predictive Asset Insights embedded Live analytics using CAP and SACPredictive Asset Insights embedded Live analytics using CAP and SACCAP as the layer between a line-of-business application's data and a live Analytics Cloud story embedded back into it — master data and operational data both. Structured as ten steps, which keeps it honest about how much of this is configuration rather than modelling.Saif, published 2021-07-18
SAP Data and Analytics Showcase - Develop a Machine Learning Application on SAP BTPSAP Data and Analytics Showcase - Develop a Machine Learning Application on SAP BTPThe overview post of a showcase written by three authors, setting out the dataset, the scenario and the solution map before any of it is built. Its job is to say which piece goes where across the SAP data and analytics portfolio; the CAP application is one station on that map rather than the subject.former_member10846, published 2022-08-12
SAP Data and Analytics Showcase – Use SAP Cloud Application Programming Model to Develop a Machine Learning Application on SAP BTPSAP Data and Analytics Showcase – Use SAP Cloud Application Programming Model to Develop a Machine Learning Application on SAP BTPThe instalment where the showcase becomes code: the CAP application built in Business Application Studio, and the sub-scenario it covers implemented step by step. The overview post is the one that says why this piece exists at all.former_member10846, published 2022-08-12
AttachmentsSAP and community
How to transfer file from CAP backsideHow to transfer file from CAP backsideA PDF arriving from the front end, stored against the record with @Core.MediaType, and then sent on to an external service for parsing. Short, and the second half is the part that is not in the plugin documentation: getting the bytes back out of the model to forward them somewhere else.published 2023-09-14
How to transfer file from CAP backside
Attachments has changed 3 times since this was published, most recently in @cap-js/sdm 1.0.0, 2024-06-26. Affects Runnable code.
Presenting sap-cap-sdm-plugin: Effortless Integration Between CAP (Node.js) and DMSPresenting sap-cap-sdm-plugin: Effortless Integration Between CAP (Node.js) and DMSThe author's introduction of the plugin, and unusually clear about its lineage: the idea came from a post about cds.plugins whose example did nothing more than append an emoji to annotated properties, and the groundwork was an earlier library, sap-cloud-cmis-client, that this builds on. Worth reading for how a plugin gets conceived as much as for what it does with Document Management Service.published 2023-10-02
Presenting sap-cap-sdm-plugin: Effortless Integration Between CAP (Node.js) and DMS
sap-cap-sdm-plugin is archived. Its last release was 2024-03-24. Affects Runnable code.
Upload attachments in a Freestyle UI5 and CAP appUpload attachments in a Freestyle UI5 and CAP appAttachments where the UI is freestyle rather than Fiori elements, so none of the generated upload behaviour applies and both ends have to be written.published 2023-12-19
Concurrency controlSAP and community
[Part – 2] Enrich CAP based Services with Behaviors using Annotations[Part – 2] Enrich CAP based Services with Behaviors using AnnotationsThe second half of a two-part walkthrough of CAP's behavioral annotations, following on from access control and input validation in the first part. This post works through @cds.autoexpose, @cds.api.ignore, @cds.persistence.exists/skip, @cds.on.insert/@cds.on.update and the @odata.Type/@odata.singleton mapping overrides, all shaping how a CDS model is projected into a service, which is data modelling. Alongside these it covers @cds.query.limit for default and maximum page sizes (pagination and streaming), @odata.etag with exclusive and shared locks for optimistic concurrency (concurrency control), and @cds.search for scoping $search to chosen elements (search), each with a CDS code example.published 2023-01-29
Data modellingSAP and community
#CAP-TechBytes Input Validation#CAP-TechBytes Input ValidationThe annotations one at a time — @mandatory, @assert.unique, @assert.range including the enum form, @assert.format — each with what it produces. Ends on error handling, which is the part that decides whether any of it is usable from a UI.Thajunniza, published 2023-07-07
Creating structured types, enums and named aspects using the CDS Graphical ModelerCreating structured types, enums and named aspects using the CDS Graphical ModelerThe modelling constructs that are awkward to draw — structured types, enums, named aspects — done in the graphical modeller rather than in CDL.Xiao-fei_Song, published 2021-05-26
Importing @sap/cds common.cds to your CAP project using the CDS Graphical ModelerImporting @sap/cds common.cds to your CAP project using the CDS Graphical ModelerPulling the common aspects and code lists from @sap/cds into a model through the modeller, so the reuse types appear in the diagram rather than only in the file.Xiao-fei_Song, published 2021-05-06
SAP CAP Adapter to expose OData as custom REST ServiceSAP CAP Adapter to expose OData as custom REST ServiceWalks through consuming an external OData V2 service in a CAP project — cds import converts the Northwind service's EDMX into a CSN and cds.connect.to wires up the remote proxy — then re-exposing it as plain REST with the @protocol:'rest' annotation instead of OData's own envelope. Shows two ways to reshape the response, renaming and dropping fields in a CDS projection or rewriting the returned objects in a custom service handler, and remaps ?pageSize and ?offset onto OData's $top and $skip in that same handler.Former Member, published 2021-09-15
SAP CAP Recent Enhancements the HANA Dev Should Know AboutSAP CAP Recent Enhancements the HANA Dev Should Know AboutThomas Jung walks through CAP features for HANA database developers that landed through late 2021: doc comments in the data model (CDL comments propagated into generated database objects via the package.json cdsc.docs compiler option), and schema evolution reaching general availability in the November 2021 release, using the @cds.persistence.journal annotation and cds.hana.journal settings to generate incremental hdbmigrationtable migration scripts instead of dropping and recreating tables. It also walks through two features outside those two: window functions in view column definitions, added in the December 2021 release, and a beta assert_integrity setting that generates database foreign-key constraints from 1:1 associations and compositions.published 2022-02-15
Database connectorsSAP and community
CAP PostgreSql setup local debugging using Docker - Part 2CAP PostgreSql setup local debugging using Docker - Part 2PostgreSQL in a container so the local loop matches the deployed one — the thing SQLite quietly stops you doing. Short, and it assumes the project from part one already runs.ramonlee5, published 2023-11-22
CAP PostgreSql setup local debugging using Docker - Part 2
Database connectors has changed twice since this was published, most recently in @sap/cds 10.1.0, 2026-09-07. Affects A recipe.
CAP with PostgreSQL DB alternate to HANA Cloud DB - Part 1CAP with PostgreSQL DB alternate to HANA Cloud DB - Part 1Bootstrapping a CAP project on PostgreSQL, framed as a choice that depends on the client rather than on the technology. Short, and part two is where it gets debuggable.ramonlee5, published 2023-10-10
cds deploy to sqlite in-memory databasecds deploy to sqlite in-memory databaseTwo pages on what cds deploy --to sqlite does and what it prints. A reference note rather than an argument, and the shortest entry in this capability.AndrewBarnard, published 2021-04-25
Create a Business Service using CDS, Node.js, SQLite and a OData serviceCreate a Business Service using CDS, Node.js, SQLite and a OData serviceThe stack at its smallest — CDS, Node, SQLite, an OData service — worked through at length. Nothing cloud in it, which is the point: it is the shape of a CAP service before any of the platform arrives.raybanton, published 2021-07-12
Create a Business Service using CDS, Node.js, SQLite and a OData service
Database connectors has changed twice since this was published, most recently in @sap/cds 10.1.0, 2026-09-07. Affects A recipe, Runnable code.
Deploying CAP services with the in-memory SQLite databaseDeploying CAP services with the in-memory SQLite databaseIn-memory, deployed to Cloud Foundry — so the data is gone on restart, on purpose. For a service whose datastore does not need to survive anything, which is a narrower case than it sounds and a real one.liam_mischewski, published 2021-05-24
Distributed Resiliency of SAP CAP applications using SAP HANA Cloud (Multi-Zone Replication)Distributed Resiliency of SAP CAP applications using SAP HANA Cloud (Multi-Zone Replication)Resilience defined the way an operator would — failures happen in a complex landscape and should go unnoticed by the user — and then what multi-zone replication on HANA Cloud means for the CAP application in front of it.shanthakumar_krishnaswamy, published 2022-11-12
Extend SAP SuccessFactors on SAP BTP with CAP - Deploy to SAP HANA CloudExtend SAP SuccessFactors on SAP BTP with CAP - Deploy to SAP HANA CloudThe deployment instalment of the author's SuccessFactors extension series — the project already exists and the imported service is already modelled, so this is only the move onto HANA Cloud. Depends on the two posts before it and says so.ale_biagi, published 2022-03-29
How I migrated my on-prem xsa cds3+hana solution to cds6+sqliteHow I migrated my on-prem xsa cds3+hana solution to cds6+sqliteThree major CDS versions and a database swap in one move, done to get an old on-premise XSA application running somewhere cheap. The repository is linked, and the interest is in what broke between cds3 and cds6 rather than in the destination.alex_myakinkii, published 2022-08-07
How I migrated my on-prem xsa cds3+hana solution to cds6+sqlite
Database connectors has changed twice since this was published, most recently in @sap/cds 10.1.0, 2026-09-07. Affects Runnable code.
How to create an API to run a HANA Cloud Stored Procedure in Cloud FoundryHow to create an API to run a HANA Cloud Stored Procedure in Cloud FoundryReaching past CDS to the database's own machinery — built-in algorithms, SQLScript procedures and functions — and putting an API in front of them. Long, and it is the case where the model is not where the logic belongs.gonzalo_hernan_sendra, published 2022-12-08
How to create an API to run a HANA Cloud Stored Procedure in Cloud Foundry
Database connectors has changed twice since this was published, most recently in @sap/cds 10.1.0, 2026-09-07. Affects Runnable code.
How to share tables across different CAP projectsHow to share tables across different CAP projectsFour scenarios for reading one CAP project's table from another, worked out as a matrix of what each one needs: the same HDI container and namespace, the same container under a different namespace, a different container, and a different Cloud Foundry space. The mechanics change with each step — @cds.persistence.exists on the reused entity throughout, an .hdbsynonym once namespaces diverge, .hdbrole and .hdbgrants once containers do, and a user-provided service built from the grantor's credentials once spaces do. The author flags the caveat themselves: these are learning scenarios, and consuming the OData service is often the better answer than reaching into another project's database. Dated corrections from twelve days after publication sit inline — synonyms need only the name because the configuration comes from .hdbsynonymconfig, SERVICE_REPLACEMENTS in mta.yaml removes the hard-coded service name, and the reused container need not be bound to the srv module.published 2021-10-03
Lets Deep dive into CAPM and HANA Cloud --> HANACapLets Deep dive into CAPM and HANA Cloud --> HANACapShort, and framed as what the author does day to day on BTP rather than as a tutorial: where CAPM meets HANA Cloud and which pieces have to agree.shivamshukla12, published 2023-07-16
Lets Deep dive into CAPM and HANA Cloud --> HANACap
Database connectors has changed twice since this was published, most recently in @sap/cds 10.1.0, 2026-09-07. Affects Runnable code.
My Learnings in SAP-CAP Using MongoDBMy Learnings in SAP-CAP Using MongoDBCAP against a document database, which the supported list does not include — and the way it gets there is the point. The CDS model and the service definitions stay; the persistence is replaced by handlers calling the mongodb driver, with @sap/cds-odata-v2-adapter-proxy in front so a UI5 application can consume it. Learnings rather than a supported path, and the only MongoDB entry here.published 2021-01-11
My Learnings in SAP-CAP Using MongoDB
sap-cap-mongodb: no published releases, repository quiet for 69 months. Affects Runnable code.
Open Sourcing CAP – how to learn more or get involvedOpen Sourcing CAP – how to learn more or get involvedA roundup of CAP's open-sourcing, begun at TechEd the year before, pointing to a webinar recording, a podcast episode and reCAP 2023 talks for background. Among the components it names are a feature toggle library giving Node.js CAP apps live-updatable toggles backed by Redis, a new pluggable database layer with SQLite and PostgreSQL implementations plus a generic SQL layer, and a change tracking component that builds a change history for data from CDS models.Fempel, published 2023-10-02
Run and Deploy SAP CAP (Java) with PostgreSQL on SAP BTP Cloud FoundryRun and Deploy SAP CAP (Java) with PostgreSQL on SAP BTP Cloud FoundrySuperseded by its own author: the post now opens with a notice that @sap/cds 7.0.0 brought native PostgreSQL support and that @cap-js/postgres should be used instead of the packages described below. Kept because that notice is the record of when the community adapter stopped being the answer.shanthakumar_krishnaswamy, published 2023-04-04
Run and Deploy SAP CAP (Java) with PostgreSQL on SAP BTP Cloud Foundry
cds-pg. Affects Runnable code.
Run and Deploy SAP CAP (Java) with PostgreSQL using Official Database Adapter @cap-js/postgresRun and Deploy SAP CAP (Java) with PostgreSQL using Official Database Adapter @cap-js/postgresThe post that records a handover. The author's earlier writing relied on the community projects cds-pg and cds-dbm; this one states that both were deprecated in favour of the official PostgreSQL support arriving with @sap/cds 7, and rewrites the path around @cap-js/postgres. For CAP Java it takes a different route to the initial schema.sql than the Node.js case, and it is candid that automatic schema deployment is convenient but not always what you want. Dated evidence for why two artifacts here went quiet.shanthakumar_krishnaswamy, published 2023-08-02
Run and Deploy SAP CAP (Java) with PostgreSQL using Official Database Adapter @cap-js/postgres
cds 7, line ended. Affects A recipe, Runnable code.
Run and Deploy SAP CAP (Node.js or Java) with PostgreSQL on SAP BTP Cloud FoundryRun and Deploy SAP CAP (Node.js or Java) with PostgreSQL on SAP BTP Cloud FoundryBoth runtimes in one walkthrough, and it stops on schema evolution — which is the reason to read it rather than one of the several other PostgreSQL posts here, since that is where the PostgreSQL story diverges from HANA's and the deploy stops being automatic.TiaXu, published 2023-07-12
Run and Deploy SAP CAP (Node.js or Java) with PostgreSQL on SAP BTP Cloud Foundry
Database connectors has changed twice since this was published, most recently in @sap/cds 10.1.0, 2026-09-07. Affects A recipe, Runnable code.
SAP BTP Showcase - Use SAP Cloud Application Programming to do Native Development on HANA CloudSAP BTP Showcase - Use SAP Cloud Application Programming to do Native Development on HANA CloudThe fifth of a seven-post showcase, and the one where CAP is used to reach HANA-native artifacts rather than to avoid them. Long, and it sits inside a series whose other parts are about Data Warehouse Cloud and CI/CD.former_member271284, published 2021-01-31
SAP BTP Showcase - Use SAP Cloud Application Programming to do Native Development on HANA Cloud
Database connectors has changed twice since this was published, most recently in @sap/cds 10.1.0, 2026-09-07. Affects A recipe, Runnable code.
SAP BTP Showcase – SAP Continuous Integration and Delivery (SAP CI&D) for SAP HANA CloudSAP BTP Showcase – SAP Continuous Integration and Delivery (SAP CI&D) for SAP HANA CloudA pipeline for the database half of a CAP application, built with cds add pipeline — one command that writes a Jenkinsfile and a .pipeline folder — and then the mta module that makes a database change deploy itself.gcalixtos, published 2021-01-27
SAP BTP Showcase – SAP Continuous Integration and Delivery (SAP CI&D) for SAP HANA Cloud
Database connectors has changed twice since this was published, most recently in @sap/cds 10.1.0, 2026-09-07. Affects Runnable code.
SAP Business Application Studio – Using SAP HANA Tools with SAP Cloud Application Programming Model projectsSAP Business Application Studio – Using SAP HANA Tools with SAP Cloud Application Programming Model projectsNative HDB artifacts inside a CAP project — the case where CDS is not enough and something has to be written as a database object. Most of the work is making the two build outputs agree: an HDB module path, a CDS build output directory, and a package.json for the module, before the artifact is added and deployed. Published under an account that has since been closed, so the byline reads Former Member.Former Member, published 2021-01-14
SAP Business Application Studio – Using SAP HANA Tools with SAP Cloud Application Programming Model projects
Database connectors has changed twice since this was published, most recently in @sap/cds 10.1.0, 2026-09-07. Affects A recipe, Runnable code.
SAP CAP (Java) with Amazon Aurora PostgreSQLSAP CAP (Java) with Amazon Aurora PostgreSQLPostgreSQL, but the hyperscaler's own managed global database rather than BTP's option — Aurora, from CAP Java. One of a pair published the same day, the other being Azure's equivalent.shanthakumar_krishnaswamy, published 2023-08-02
SAP CAP (Java) with Amazon Aurora PostgreSQL
Database connectors has changed twice since this was published, most recently in @sap/cds 10.1.0, 2026-09-07. Affects A recipe, Runnable code.
SAP CAP (Java) with Azure Cosmos DB for PostgreSQLSAP CAP (Java) with Azure Cosmos DB for PostgreSQLThe Azure half of the pair: Cosmos DB speaking PostgreSQL, used from CAP Java. Same shape as the Aurora post, and reading both is how you see what is actually portable between them.shanthakumar_krishnaswamy, published 2023-08-02
SAP CAP (Java) with Azure Cosmos DB for PostgreSQL
Database connectors has changed twice since this was published, most recently in @sap/cds 10.1.0, 2026-09-07. Affects A recipe, Runnable code.
SFSFとHANA Cloudを使用するCAPのアプリケーション開発SFSFとHANA Cloudを使用するCAPのアプリケーション開発In Japanese. A hands-on taking data between SuccessFactors and HANA Cloud through a CAP application — the connection setup, the data and service models, then read and write logic, and a Cloud Foundry deploy. Long enough to carry its own table of contents.rasai, published 2022-12-14
SFSFとHANA Cloudを使用するCAPのアプリケーション開発
Database connectors has changed twice since this was published, most recently in @sap/cds 10.1.0, 2026-09-07. Affects A recipe, Runnable code.
Simple steps to deploy your CAP project to HANA cloudSimple steps to deploy your CAP project to HANA cloudWritten from the far side of a failed deploy — the author says these are the troubleshooting steps that ended up working, not a designed procedure. Short, and honest about being a record rather than a recommendation.OmPrakashJha, published 2021-02-11
Testing your CAP HANA Artifacts with jest – including multitenancy, hdbprocedure and hdbviewTesting your CAP HANA Artifacts with jest – including multitenancy, hdbprocedure and hdbviewcds.test covers the service; this covers what is underneath it, where the artifact is an hdbprocedure or an hdbview that CDS never sees. That means a real HDI container, so most of the post is about where to get one and how to give CAP access to it — the tests are the easy part once that is true.Tristan, published 2022-08-30
Testing your CAP HANA Artifacts with jest – including multitenancy, hdbprocedure and hdbview
Testing has changed 3 times since this was published, most recently in @cap-js/cds-test 1.0.0, 2026-04-23. Affects A recipe, Runnable code.
Upload data from excel in CAP (Node.js)Upload data from excel in CAP (Node.js)Mass upload from a spreadsheet, both halves shown: an entity marked @cds.persistence.skip to receive the file, an INSERT built from the parsed rows, and a list report extended with the upload button that starts it.KM11, published 2022-11-21
Upload data from excel in CAP (Node.js)
Database connectors has changed twice since this was published, most recently in @sap/cds 10.1.0, 2026-09-07. Affects Runnable code.
Useful CAP CDS and Fiori Commands to Accelerate Development and DeploymentUseful CAP CDS and Fiori Commands to Accelerate Development and DeploymentA command-by-command walkthrough of @sap/cds-dk's cds add and fiori add generators: cds add xsuaa writes an XSUAA security configuration from the CDS model's authorization annotations, and cds add hana together with cds deploy --to hana switches persistence from the default SQLite database to SAP HANA Cloud. cds add mta and fiori add deploy-config, from @sap/generator-fiori, build the Cloud Foundry deployment descriptor together, adding a destination-service block and an xs-app.json that routes the Fiori app's calls through a named destination.TiaXu, published 2022-10-19
Native SAP HANA artifactsSAP only
How to share tables across different CAP projectsHow to share tables across different CAP projectsFour scenarios for reading one CAP project's table from another, worked out as a matrix of what each one needs: the same HDI container and namespace, the same container under a different namespace, a different container, and a different Cloud Foundry space. The mechanics change with each step — @cds.persistence.exists on the reused entity throughout, an .hdbsynonym once namespaces diverge, .hdbrole and .hdbgrants once containers do, and a user-provided service built from the grantor's credentials once spaces do. The author flags the caveat themselves: these are learning scenarios, and consuming the OData service is often the better answer than reaching into another project's database. Dated corrections from twelve days after publication sit inline — synonyms need only the name because the configuration comes from .hdbsynonymconfig, SERVICE_REPLACEMENTS in mta.yaml removes the hard-coded service name, and the reused container need not be bound to the srv module.published 2021-10-03
Schema evolutionSAP and community
How I migrated my on-prem xsa cds3+hana solution to cds6+sqliteHow I migrated my on-prem xsa cds3+hana solution to cds6+sqliteThree major CDS versions and a database swap in one move, done to get an old on-premise XSA application running somewhere cheap. The repository is linked, and the interest is in what broke between cds3 and cds6 rather than in the destination.alex_myakinkii, published 2022-08-07
How I migrated my on-prem xsa cds3+hana solution to cds6+sqlite
Database connectors has changed twice since this was published, most recently in @sap/cds 10.1.0, 2026-09-07. Affects Runnable code.
Run and Deploy SAP CAP (Java) with PostgreSQL using Official Database Adapter @cap-js/postgresRun and Deploy SAP CAP (Java) with PostgreSQL using Official Database Adapter @cap-js/postgresThe post that records a handover. The author's earlier writing relied on the community projects cds-pg and cds-dbm; this one states that both were deprecated in favour of the official PostgreSQL support arriving with @sap/cds 7, and rewrites the path around @cap-js/postgres. For CAP Java it takes a different route to the initial schema.sql than the Node.js case, and it is candid that automatic schema deployment is convenient but not always what you want. Dated evidence for why two artifacts here went quiet.shanthakumar_krishnaswamy, published 2023-08-02
Run and Deploy SAP CAP (Java) with PostgreSQL using Official Database Adapter @cap-js/postgres
cds 7, line ended. Affects A recipe, Runnable code.
Run and Deploy SAP CAP (Node.js or Java) with PostgreSQL on SAP BTP Cloud FoundryRun and Deploy SAP CAP (Node.js or Java) with PostgreSQL on SAP BTP Cloud FoundryBoth runtimes in one walkthrough, and it stops on schema evolution — which is the reason to read it rather than one of the several other PostgreSQL posts here, since that is where the PostgreSQL story diverges from HANA's and the deploy stops being automatic.TiaXu, published 2023-07-12
Run and Deploy SAP CAP (Node.js or Java) with PostgreSQL on SAP BTP Cloud Foundry
Database connectors has changed twice since this was published, most recently in @sap/cds 10.1.0, 2026-09-07. Affects A recipe, Runnable code.
SAP CAP Recent Enhancements the HANA Dev Should Know AboutSAP CAP Recent Enhancements the HANA Dev Should Know AboutThomas Jung walks through CAP features for HANA database developers that landed through late 2021: doc comments in the data model (CDL comments propagated into generated database objects via the package.json cdsc.docs compiler option), and schema evolution reaching general availability in the November 2021 release, using the @cds.persistence.journal annotation and cds.hana.journal settings to generate incremental hdbmigrationtable migration scripts instead of dropping and recreating tables. It also walks through two features outside those two: window functions in view column definitions, added in the December 2021 release, and a beta assert_integrity setting that generates database foreign-key constraints from 1:1 associations and compositions.published 2022-02-15
SearchSAP and community
Case-insensitive filters in Fiori Elements (List report + CAP)Case-insensitive filters in Fiori Elements (List report + CAP)A blocker rather than a feature: filters on a List Report are case-sensitive, the business wanted them not to be, and the CAP backend is where it gets fixed. Node and Java both.Kishannaicker, published 2022-04-26
Improved Search Performance in SAP BTP Core, SAP Cloud Application Programming Model, Node.js RuntimeImproved Search Performance in SAP BTP Core, SAP Cloud Application Programming Model, Node.js RuntimeExplains CDS version 5's @cds.search annotation, which lets a service declare which elements a search query covers, and states that only String-typed elements are searched by default so the generated SQL stays simple. Covers two further changes to @sap/cds's Node.js runtime: metadata about which elements are searchable is now cached, and search over localized text can resolve at query time instead of through a compiled view, avoiding a coalesce function that blocks filter push-down on SAP HANA. Also describes an experimental toggle, cds.env.features.optimized_search, that lets the runtime choose the CONTAINS predicate over LIKE for large data sets.published 2021-08-18
Transaction managementSAP only
SAP Cloud Application Programming Model（CAP）：カスタムロジックの実装 – Part 2SAP Cloud Application Programming Model（CAP）：カスタムロジックの実装 – Part 2A walkthrough of implementing custom logic in a CAP Node.js service for the capire bookshop sample, registering before, on and after handlers around the generated CRUD service for its Books and Orders entities. The before handler validates an incoming order's amount and runs a transactional CQN UPDATE to decrement stock, raising a 400 or 409 through req.error when the amount is invalid or no rows match; an after handler on READ appends a discount note to overstocked books.rasai, published 2021-01-01
Async processingSAP and community
SAP Job Scheduling Service + Cloud Application Programming Model application (CAP) + SAP Authorization and Trust Management Service (XSUAA)SAP Job Scheduling Service + Cloud Application Programming Model application (CAP) + SAP Authorization and Trust Management Service (XSUAA)Calling an unsecured endpoint on a schedule is trivial; this is the same thing once the endpoint is protected. The interesting part is the caller — the Job Scheduling Service is not a person, so CAP's pseudo-roles are where the post spends its time, and $XSSERVICENAME has to match the scheduler's own instance name.former_member412792, published 2022-12-12
DestinationsSAP and community
Architecting Complex Real Life Business Scenario on SAP BTP with ease [ Targeting Multiple backend S/4HANA Systems utilizing Principal Propagation ]Architecting Complex Real Life Business Scenario on SAP BTP with ease [ Targeting Multiple backend S/4HANA Systems utilizing Principal Propagation ]The opening of a three-part series on reaching more than one S/4HANA system from one CAP application with the user's identity carried through. This part sets up the business problem; the propagation itself is in the parts that follow.mohit_bansal3, published 2022-11-25
BTP CAP : How to Connect to Remote Services Locally in CAP ApplicationBTP CAP : How to Connect to Remote Services Locally in CAP ApplicationThe same problem four years earlier: a CAP application that consumes a remote service, running locally against the real thing rather than against a mock.showkath_naseem, published 2022-12-12
CAP Service to Fetch + Create Sales Order in S4 HANA Public CloudCAP Service to Fetch + Create Sales Order in S4 HANA Public CloudA CAP Node.js walkthrough imports SAP S/4HANA Cloud's Sales Order OData API with cds import, adds csrf handling to the generated service definition, and forwards a custom REST action's reads and writes to the remote proxy through cds.connect.to, the pattern Service integration covers. The mta.yaml binds the SAP S/4HANA Cloud extensibility service and a SAP Destination service instance so the S/4HANA Public Cloud system's address and credentials stay outside the application, per Destinations.Mujeeb, published 2023-05-30
Connecting On Premise Mail Destination and Sending Email Using SAP Cloud SDK JavaScript Version 3 on SAP CAPConnecting On Premise Mail Destination and Sending Email Using SAP Cloud SDK JavaScript Version 3 on SAP CAPMail from CAP through a company's own SMTP server rather than a hosted one, which is the case the existing answers did not cover — the author names them and says why each failed here: one needed an SMTP provider like Mailtrap, another solved it in Java. What is left is the connectivity: an on-premise mail destination reached from Node, and a hybrid profile to test it against.codebrokerad, published 2023-02-14
Connecting On Premise Mail Destination and Sending Email Using SAP Cloud SDK JavaScript Version 3 on SAP CAP
Destinations changed in @sap-cloud-sdk/connectivity 4.0.0, 2025-03-04. Affects Runnable code.
Execute [OAuth2 client credentials] protected REST request with SAP CAP ApplicationExecute [OAuth2 client credentials] protected REST request with SAP CAP ApplicationA recipe, and the author calls it that — package.json, a .cds and a handler — for calling a remote service protected by OAuth2 client credentials from a CAP application. Short, complete, and addressed to CAP developers rather than to BTP administrators.Lachmish, published 2022-04-27
Execute [OAuth2 client credentials] protected REST request with SAP CAP Application
Authentication changed in CAP Java 3.0.1, 2024-07-26. Affects A recipe.
Extend SAP SuccessFactors on SAP BTP with CAP - Import SAP SuccessFactors OData Services definitionsExtend SAP SuccessFactors on SAP BTP with CAP - Import SAP SuccessFactors OData Services definitionsWalks through importing the ECEmployeeProfile and PLTUserManagement OData services from SAP API Business Hub into a CAP project: downloading their EDMX files, running cds import in SAP Business Application Studio to generate the CSN under srv/external, and pointing the resulting cds.requires entries at a destination. The second half creates a destination and an XSUAA service instance on BTP and binds their service keys into a default-env.json file so the project can reach SAP SuccessFactors during local development.published 2022-03-21
HTML5.Timeout for CAP destinations in mta.yaml longer than defaultHTML5.Timeout for CAP destinations in mta.yaml longer than defaultA page and a half about one property that has to be raised when a CAP destination is slower than the default allows — and it now opens with its own correction, dated October 2025, that the property is called timeout rather than HTML5.Timeout, credited to a commenter. The correction is why it is worth keeping.NilsJanen, published 2022-11-09
Invoke OpenAPI-documented APIs remotely with SAP Cloud Application Programming ModelInvoke OpenAPI-documented APIs remotely with SAP Cloud Application Programming ModelThe other direction: consuming an API described by an OpenAPI document from CAP, rather than publishing one. Worth pairing with the plugin entries here, which all serve the outbound half.wittro, published 2022-08-30
Invoke OpenAPI-documented APIs remotely with SAP Cloud Application Programming Model
Destinations changed in @sap-cloud-sdk/connectivity 4.0.0, 2025-03-04. Affects Runnable code.
Part 3: Architecting Complex Real Life Business Scenario on SAP BTP with ease [ Targeting Multiple backend S/4HANA Systems utilizing Principal Propagation ]Part 3: Architecting Complex Real Life Business Scenario on SAP BTP with ease [ Targeting Multiple backend S/4HANA Systems utilizing Principal Propagation ]The final part, and the one with the most CAP in it — the service consuming the propagated destinations, and what the handler sees. Read the three together; the series is one piece.mohit_bansal3, published 2022-11-25
Part 3: Architecting Complex Real Life Business Scenario on SAP BTP with ease [ Targeting Multiple backend S/4HANA Systems utilizing Principal Propagation ]
Destinations changed in @sap-cloud-sdk/connectivity 4.0.0, 2025-03-04. Affects A recipe.
Qualtrics integration with domain based authorization in CAP project on HANA cloudQualtrics integration with domain based authorization in CAP project on HANA cloudSurveys pulled from Qualtrics into a CAP application in real time, with the twist in the title: authorisation decided by the user's domain rather than by a role collection. A pattern that comes up whenever the audience is wider than the tenant.former_member69893, published 2022-09-30
Qualtrics integration with domain based authorization in CAP project on HANA cloud
Authorization has changed twice since this was published, most recently in CAP Java 3.7.1, 2025-01-30. Affects Runnable code.
SAP BTP Destinations in a Nutshell Part 1 - Motivation & NoAuthentication DestinationsSAP BTP Destinations in a Nutshell Part 1 - Motivation & NoAuthentication DestinationsOpens a series on SAP BTP Destinations by walking through the simplest case, a NoAuthentication destination from one CAP Node.js app to another on Cloud Foundry, shown two ways: executeHttpRequest from @sap-cloud-sdk/http-client, and a manual sequence that reads the destination service's credentials from VCAP_SERVICES, fetches an OAuth token, and requests the destination by name before calling its URL. The manual path is written deliberately verbose to show what the Cloud SDK call does behind the scenes; later parts of the series cover the other destination types.JakobFra, published 2023-05-23
SAP CAP Remote Services & SAP Fiori ElementsSAP CAP Remote Services & SAP Fiori ElementsWhat happens to a generated UI when the data is not local: a CAP service projecting a remote one, with Fiori elements on top. The author explored it to find out where the abstraction holds, which is the useful register for this.Former Member, published 2021-05-20
SAP CAP Remote Services & SAP Fiori Elements
Fiori annotations changed in @sap/cds-dk 9.6.0, 2025-12-17. Affects A recipe, Runnable code.
SFSFとHANA Cloudを使用するCAPのアプリケーション開発SFSFとHANA Cloudを使用するCAPのアプリケーション開発In Japanese. A hands-on taking data between SuccessFactors and HANA Cloud through a CAP application — the connection setup, the data and service models, then read and write logic, and a Cloud Foundry deploy. Long enough to carry its own table of contents.rasai, published 2022-12-14
SFSFとHANA Cloudを使用するCAPのアプリケーション開発
Database connectors has changed twice since this was published, most recently in @sap/cds 10.1.0, 2026-09-07. Affects A recipe, Runnable code.
Surviving and Thriving with the SAP Cloud Application Programming Model: Local development hurdlesSurviving and Thriving with the SAP Cloud Application Programming Model: Local development hurdlesThree hurdles in running a CAP application locally: services mocked with cds run --with-mocks return no data across OData associations until the ON clause is hand-written into the imported CDS, an on-premise API reached through the SAP Cloud Connector times out because its proxy is part of destinations and connectivity and reachable only from inside SAP BTP, and a Fiori frontend served from the HTML5 Application Repository needs the HTML5 Repo Mock to reach a local backend at all. It closes with the launch configurations the author uses for debugging cds watch locally and attaching to a running Cloud Foundry instance.maxstreifeneder, published 2023-02-02
Useful CAP CDS and Fiori Commands to Accelerate Development and DeploymentUseful CAP CDS and Fiori Commands to Accelerate Development and DeploymentA command-by-command walkthrough of @sap/cds-dk's cds add and fiori add generators: cds add xsuaa writes an XSUAA security configuration from the CDS model's authorization annotations, and cds add hana together with cds deploy --to hana switches persistence from the default SQLite database to SAP HANA Cloud. cds add mta and fiori add deploy-config, from @sap/generator-fiori, build the Cloud Foundry deployment descriptor together, adding a destination-service block and an xs-app.json that routes the Fiori app's calls through a named destination.TiaXu, published 2022-10-19
Document outputSAP and community
Using Custom Actions to display PDF from SAP BTP Forms service into a CAP SAPUI5 applicationUsing Custom Actions to display PDF from SAP BTP Forms service into a CAP SAPUI5 applicationA requirement that arrived after the application was finished — render a PDF from the record currently open on an object page — and the join it needed: the Forms service bound to the CAP application, a custom action on the service, and a button on the object page header calling it.rodfior, published 2023-01-30
Event MeshSAP and community
[Blog Post] SAP Event Mesh - Consuming S4 events simultaneously in CAP-based applications and SAP Integration Suite[Blog Post] SAP Event Mesh - Consuming S4 events simultaneously in CAP-based applications and SAP Integration SuiteOne S/4HANA event, two consumers at once: a CAP Java application and SAP Integration Suite. Late in a long Deep Dive series and written as such — the queues, the S/4HANA connection and the Integration Suite side were all established in earlier posts, so this is the part where they meet.AyushKumar and vipul.khullar, published 2023-03-24
[Blog Post] SAP Event Mesh - Consuming S4 events simultaneously in CAP-based applications and SAP Integration Suite
Event Mesh changed in @sap/cds 10.0.3, 2026-07-02. Affects Runnable code.
[Blog Post] SAP Event Mesh – CAP based implementation of SAP Event Mesh in a Single-Tenant Scenario[Blog Post] SAP Event Mesh – CAP based implementation of SAP Event Mesh in a Single-Tenant ScenarioThe instalment of the Deep Dive series where the framework arrives. The earlier posts consumed Event Mesh over its REST API, so this one is explicitly a comparison: the same thing through CAP's messaging abstraction, with the three flavours — local, file-based and a real broker — named before the broker one is built.AyushKumar and vipul.khullar, published 2022-06-06
[Blog Post] SAP Event Mesh – CAP based implementation of SAP Event Mesh in a Single-Tenant Scenario
Event Mesh changed in @sap/cds 10.0.3, 2026-07-02. Affects A recipe, Runnable code.
CAP - Specifying the queues to be consumed from SAP Event MeshCAP - Specifying the queues to be consumed from SAP Event MeshWritten against the edge of the convention rather than the convention. CAP creates one queue per application and names it for you; this is the case where the queue already exists, belongs to someone else, or there is more than one of them. The oldest Event Mesh post indexed here, and the only one about taking the naming back.schardosin, published 2021-06-21
Event Driven Architecture with Event Mesh - Part-1Event Driven Architecture with Event Mesh - Part-1Continues the author's own CDS entity-relationship example rather than starting a fresh one, which is the point of it — the same model gains events. Concepts first, then a message client and queue on BTP, then a Postman check that the queue works before any CAP code is written, and finally the emit from a CAP REST service.Avinash_Vaidya, published 2022-12-04
Event Driven Architecture with Event Mesh - Part-1
Event Mesh changed in @sap/cds 10.0.3, 2026-07-02. Affects A recipe, Runnable code.
Event Driven Architecture with Event Mesh – Part-2Event Driven Architecture with Event Mesh – Part-2Part 1 published a message and stopped there; this closes the loop by giving it somewhere to go. A REST API built in Integration Suite is registered as a webhook on the Event Mesh queue, and the chain is run end to end — CAP to Event Mesh to Integration Suite to Twilio — so the consumer side and the webhook configuration are what this adds.Avinash_Vaidya, published 2023-01-30
Event Driven Architecture with Event Mesh – Part-2
Event Mesh changed in @sap/cds 10.0.3, 2026-07-02. Affects A recipe, Runnable code.
SAP Event Mesh: S4 HANA On-Prem and SAP CI(BTP IS) through WebSocket and WebhooksSAP Event Mesh: S4 HANA On-Prem and SAP CI(BTP IS) through WebSocket and WebhooksA step-by-step walkthrough of wiring Event Mesh to publish and consume events between an on-premise S/4HANA system and Cloud Integration, contrasting persistent queues (one subscriber, kept until consumed) against unpersisted topics, and WebSocket's AMQP transport against webhook delivery for the same queue. Two tested findings support it: a queue consumer running in continuous consumption mode receives a message ahead of a webhook on the same topic, and a message stays queued and is retried (almost 8770 times in under a minute, in the author's test) until the consumer processes it successfully.FarooqAhmed, published 2023-10-03
NotificationsSAP and community
Connecting On Premise Mail Destination and Sending Email Using SAP Cloud SDK JavaScript Version 3 on SAP CAPConnecting On Premise Mail Destination and Sending Email Using SAP Cloud SDK JavaScript Version 3 on SAP CAPMail from CAP through a company's own SMTP server rather than a hosted one, which is the case the existing answers did not cover — the author names them and says why each failed here: one needed an SMTP provider like Mailtrap, another solved it in Java. What is left is the connectivity: an on-premise mail destination reached from Node, and a hybrid profile to test it against.codebrokerad, published 2023-02-14
Connecting On Premise Mail Destination and Sending Email Using SAP Cloud SDK JavaScript Version 3 on SAP CAP
Destinations changed in @sap-cloud-sdk/connectivity 4.0.0, 2025-03-04. Affects Runnable code.
Receive Notifications from Amazon Simple Notification Service for SAP S/4HANA BTP Extension AppReceive Notifications from Amazon Simple Notification Service for SAP S/4HANA BTP Extension AppEmail notifications from a CAP application through Amazon SNS instead of anything SAP provides — a hyperscaler service used directly from the extension rather than through a BTP intermediary. The argument for it is stated as reach rather than cost: the extension gets the platform's services and the hyperscaler's at the same time.albertoliu1993, published 2022-10-14
Service integrationSAP and community
#BTP #SAPCAP: Quirky Nuggets (N05-N06)#BTP #SAPCAP: Quirky Nuggets (N05-N06)On SAP BTP, Cloud Foundry Runtime, a one-shot PostgreSQL db-deployer app can be restarted by the platform's default port-type health check inside its 60-second timeout, re-running the deploy and duplicating data in the PostgreSQL database; setting health-check-type to process or http, via cf commands or the app's mta.yaml parameters, avoids it. In CAP, a remote service's entities are imported and consumed through cds.connect.to and queried via a projection, but its functions and actions cannot be projected: they must be redefined in the consuming service's own interface, with the handler forwarding the call to the remote proxy.published 2023-07-27
CAP Service to Fetch + Create Sales Order in S4 HANA Public CloudCAP Service to Fetch + Create Sales Order in S4 HANA Public CloudA CAP Node.js walkthrough imports SAP S/4HANA Cloud's Sales Order OData API with cds import, adds csrf handling to the generated service definition, and forwards a custom REST action's reads and writes to the remote proxy through cds.connect.to, the pattern Service integration covers. The mta.yaml binds the SAP S/4HANA Cloud extensibility service and a SAP Destination service instance so the S/4HANA Public Cloud system's address and credentials stay outside the application, per Destinations.Mujeeb, published 2023-05-30
Extend SAP SuccessFactors on SAP BTP with CAP - Create the CAP ServiceExtend SAP SuccessFactors on SAP BTP with CAP - Create the CAP ServiceWalks through writing a service definition in SAP Business Application Studio that projects entities from an existing CDS model: one entity gets @odata.draft.enabled because Fiori Elements only shows CRUD actions on a draft-enabled entity, and a read-only projection of an already-imported SuccessFactors OData entity fails with the generic handlers because the call is delegated to the remote service, so a custom handler is needed. Running cds watch then serves the entities, drafts and $metadata at the declared service path.published 2022-03-23
Extend SAP SuccessFactors on SAP BTP with CAP - Import SAP SuccessFactors OData Services definitionsExtend SAP SuccessFactors on SAP BTP with CAP - Import SAP SuccessFactors OData Services definitionsWalks through importing the ECEmployeeProfile and PLTUserManagement OData services from SAP API Business Hub into a CAP project: downloading their EDMX files, running cds import in SAP Business Application Studio to generate the CSN under srv/external, and pointing the resulting cds.requires entries at a destination. The second half creates a destination and an XSUAA service instance on BTP and binds their service keys into a default-env.json file so the project can reach SAP SuccessFactors during local development.published 2022-03-21
SAP CAP Adapter to expose OData as custom REST ServiceSAP CAP Adapter to expose OData as custom REST ServiceWalks through consuming an external OData V2 service in a CAP project — cds import converts the Northwind service's EDMX into a CSN and cds.connect.to wires up the remote proxy — then re-exposing it as plain REST with the @protocol:'rest' annotation instead of OData's own envelope. Shows two ways to reshape the response, renaming and dropping fields in a CDS projection or rewriting the returned objects in a custom service handler, and remaps ?pageSize and ?offset onto OData's $top and $skip in that same handler.Former Member, published 2021-09-15
SAP CAP: Consume SAP API Hub Sandbox Data as an external service Part- 1SAP CAP: Consume SAP API Hub Sandbox Data as an external service Part- 1Walks through consuming SAP API Business Hub's Business Partner sandbox API from a CAP Node.js project: @sap/cds-dk's cds import turns the downloaded EDMX into a CSN model and a cds.requires entry, a projection service exposes it, and a custom handler forwards reads to the proxy through @sap/cds's cds.connect.to and bp.run(req.query). Reaching the sandbox needs the API key added as a header on that same credentials block, since the destination service that would carry it is left for a promised part two.DebashishDas, published 2022-03-17
LLM integrationSAP and community
A ChatGPT-like chat app built with modern SAP technologies (CAP, SAPUI5) – Part 1/3A ChatGPT-like chat app built with modern SAP technologies (CAP, SAPUI5) – Part 1/3The concepts before the code: what the GPT model and its API actually offer, and what the finished chat application looks like — personalities included. Written in the weeks when the ground was moving under it, and the post carries its own change log to prove it: GPT-3.5 added on 1 March, GPT-4 on 15 March, and an admission that a series planned as two posts became three.published 2023-02-22
A ChatGPT-like chat app built with modern SAP technologies (CAP, SAPUI5) – Part 1/3
cap-ui5-gpt-chat: no published releases, repository quiet for 41 months. Affects Runnable code.
A ChatGPT-like chat app built with modern SAP technologies (CAP, SAPUI5) – Part 2/3A ChatGPT-like chat app built with modern SAP technologies (CAP, SAPUI5) – Part 2/3The backend: CAP with TypeScript, the entities holding chats and personalities, and the service that talks to the API. This is where the streamed completion and the repositories behind the handler come from, which is the part of the sample still worth lifting even though the model access has since been superseded by AI Core.published 2023-02-24
A ChatGPT-like chat app built with modern SAP technologies (CAP, SAPUI5) – Part 2/3
cap-ui5-gpt-chat: no published releases, repository quiet for 41 months. Affects Runnable code.
A ChatGPT-like chat app built with modern SAP technologies (CAP, SAPUI5) – Part 3/3A ChatGPT-like chat app built with modern SAP technologies (CAP, SAPUI5) – Part 3/3The SAPUI5 frontend of the sample, and mostly an argument for writing UI5 in TypeScript: ES imports in place of sap.ui.define, a class with real private members in place of the underscore convention, and the service types generated from the CDS model copied into the UI package, so one IChats interface types the OData object the controller reads. The second half is structure — a formatter class and a singleton LayoutManager called from the XML view through core:require, a confirmation helper taking a callback, a dialog class resolving a promise, a generic createEntity<T> on a service class — all of it to keep every controller under 100 lines. What it says about arranging a UI5 app holds whatever model sits behind the chat; the tooling around it is of its date, and the post calls UI5's TypeScript support experimental.published 2023-02-27
A ChatGPT-like chat app built with modern SAP technologies (CAP, SAPUI5) – Part 3/3
cds2types. Affects Runnable code.
Automate your Job Postings Using Generative AI (ChatGPT) & SAP Build Process Automation AppsAutomate your Job Postings Using Generative AI (ChatGPT) & SAP Build Process Automation AppsA process that drafts its own text: ChatGPT writing job postings, SAP Build Process Automation carrying them through approval, and CAP in between. Presented as a generic pattern the author expects to be adapted rather than copied.shivamshukla12, published 2023-08-10
Creating a meal generator application with SAP Build, Cloud Application Programming and openAICreating a meal generator application with SAP Build, Cloud Application Programming and openAIIngredients in, meal suggestions out, assembled from BTP services plus OpenAI and Google APIs. A small application built for the pleasure of it, and useful here as the plainest example of CAP holding the middle of a generative flow.former_member793421, published 2023-07-17
Empowering Your Data Analytics with GPT-3 and SAP CAP IntegrationEmpowering Your Data Analytics with GPT-3 and SAP CAP IntegrationFree text in, SQL out, answer back in a sentence — the model writes the query, CAP runs it, and the model turns the rows into prose. Written in the GPT-3 window, so the model access has dated, but the three-step shape has not, and it is a different bet from retrieval: nothing is embedded, the schema is the context.Former Member, published 2023-03-10
AuthenticationSAP and community
Architecting Complex Real Life Business Scenario on SAP BTP with ease [ Targeting Multiple backend S/4HANA Systems utilizing Principal Propagation ]Architecting Complex Real Life Business Scenario on SAP BTP with ease [ Targeting Multiple backend S/4HANA Systems utilizing Principal Propagation ]The opening of a three-part series on reaching more than one S/4HANA system from one CAP application with the user's identity carried through. This part sets up the business problem; the propagation itself is in the parts that follow.mohit_bansal3, published 2022-11-25
Execute [OAuth2 client credentials] protected REST request with SAP CAP ApplicationExecute [OAuth2 client credentials] protected REST request with SAP CAP ApplicationA recipe, and the author calls it that — package.json, a .cds and a handler — for calling a remote service protected by OAuth2 client credentials from a CAP application. Short, complete, and addressed to CAP developers rather than to BTP administrators.Lachmish, published 2022-04-27
Execute [OAuth2 client credentials] protected REST request with SAP CAP Application
Authentication changed in CAP Java 3.0.1, 2024-07-26. Affects A recipe.
Part 3: Architecting Complex Real Life Business Scenario on SAP BTP with ease [ Targeting Multiple backend S/4HANA Systems utilizing Principal Propagation ]Part 3: Architecting Complex Real Life Business Scenario on SAP BTP with ease [ Targeting Multiple backend S/4HANA Systems utilizing Principal Propagation ]The final part, and the one with the most CAP in it — the service consuming the propagated destinations, and what the handler sees. Read the three together; the series is one piece.mohit_bansal3, published 2022-11-25
Part 3: Architecting Complex Real Life Business Scenario on SAP BTP with ease [ Targeting Multiple backend S/4HANA Systems utilizing Principal Propagation ]
Destinations changed in @sap-cloud-sdk/connectivity 4.0.0, 2025-03-04. Affects A recipe.
SAP Build Process Automation – Use Principal Propagation in Actions sample: CAP Node.js ServiceSAP Build Process Automation – Use Principal Propagation in Actions sample: CAP Node.js ServiceThe follow-up that carries the identity through. It takes the CAP service from the Actions tutorial and puts the calling user's identity behind it — an XSUAA instance, a trust configuration, an OAuthSAMLBearerAssertion destination, and the service changed to use that instance — so a step runs on behalf of a person rather than as the process.TJe, published 2023-06-22
SAP Build Process Automation – Use Principal Propagation in Actions sample: CAP Node.js Service
Workflow integration has changed twice since this was published, most recently in @cap-js/n8n 0.0.1, 2026-08-27. Affects A recipe.
SAP Business Technology Platform: Authorization and Trust Management ServiceSAP Business Technology Platform: Authorization and Trust Management ServiceWalks through how the SAP Authorization and Trust Management service secures a BTP application: scopes, attributes and role templates in the security descriptor, and the OAuth 2.0 resource-owner, client and resource-server roles it builds on. Covers the XSUAA microservice as the OAuth 2.0 authorization server bound to each application through its service broker, the signed JSON Web Token it issues after authentication, and the App Router's place in front of the resource apps as the gateway that starts authentication and checks for cross-site request forgery.SekhuteTK, published 2022-09-09
SAP CAP JWT Token Flow in codeSAP CAP JWT Token Flow in codeOne question, answered precisely: at what point does the JWT exist and how does it end up on req.headers.authorization in a CAP handler. XSUAA issues it and the approuter carries it, and the post follows it through both.sandeepmalhotra, published 2023-04-03
SAP CAP JWT Token Flow in code
Authentication changed in CAP Java 3.0.1, 2024-07-26. Affects Runnable code.
XSUAA Based Authentication - Using Managed ApprouterXSUAA Based Authentication - Using Managed ApprouterOne half of a pair published the same day, both starting from capire's list of authentication kinds and then going end to end on XSUAA. This is the managed approuter route, where the platform runs the router and the application supplies configuration rather than a module.rahul_rajagopal, published 2023-09-25
XSUAA Based Authentication - Using Managed Approuter
Authorization has changed twice since this was published, most recently in CAP Java 3.7.1, 2025-01-30. Affects A recipe.
AuthorizationSAP and community
[Part - 1] Enrich CAP based Services with Behaviors using Annotations[Part - 1] Enrich CAP based Services with Behaviors using AnnotationsWalks through CDS annotations that add behaviour beyond CRUD: @readonly and @insertonly take away write, update or delete on an entity or element, each shown with the OData metadata it generates. @mandatory, @assert.unique, @assert.integrity, @assert.format and @assert.range then enforce input checks that @sap/cds runs on write, with the SQL or HANA constraint @assert.unique compiles to and the error code each rejection returns. It names @restrict and @requires but defers them, calling authorization too large a topic for this post.published 2023-01-28
An approach to secure multiple integrated SAP CAP java applications with a common XSUAA service instanceAn approach to secure multiple integrated SAP CAP java applications with a common XSUAA service instanceOne XSUAA instance across several CAP Java applications that call each other, rather than one per application. Short, and written from inside SAP Labs as something the author tried — the value is the shape of the arrangement, not a walkthrough.sreanik_dhanyakumar2, published 2022-09-14
How to get authenticated user information with CAP in three different ways – Using the XSUAA APIHow to get authenticated user information with CAP in three different ways – Using the XSUAA APIThe third of three approaches the author sets out, and the one that returns the most: going to the XSUAA API directly rather than reading what CAP already put on the request. Depends on an earlier post for the project setup, so it starts mid-stream on purpose.ale_biagi, published 2022-07-18
Insights of Cloud SDK, CAP, XSUAA, SSH and other BTP topics from 2021Insights of Cloud SDK, CAP, XSUAA, SSH and other BTP topics from 2021A year in review, and one section in it is the reason it is here: "CAP isn't the solution for everything" — the author's point being that a pure UI5 or Fiori application does not need a CAP service wrapped around it, and that an approuter or the HTML5 Application Repository may be the better answer. The XSUAA section is a complaint about complexity rather than a guide, which is also worth having on the record.dr_vup, published 2021-12-30
Qualtrics integration with domain based authorization in CAP project on HANA cloudQualtrics integration with domain based authorization in CAP project on HANA cloudSurveys pulled from Qualtrics into a CAP application in real time, with the twist in the title: authorisation decided by the user's domain rather than by a role collection. A pattern that comes up whenever the audience is wider than the tenant.former_member69893, published 2022-09-30
Qualtrics integration with domain based authorization in CAP project on HANA cloud
Authorization has changed twice since this was published, most recently in CAP Java 3.7.1, 2025-01-30. Affects Runnable code.
SAP Business Technology Platform: Authorization and Trust Management ServiceSAP Business Technology Platform: Authorization and Trust Management ServiceWalks through how the SAP Authorization and Trust Management service secures a BTP application: scopes, attributes and role templates in the security descriptor, and the OAuth 2.0 resource-owner, client and resource-server roles it builds on. Covers the XSUAA microservice as the OAuth 2.0 authorization server bound to each application through its service broker, the signed JSON Web Token it issues after authentication, and the App Router's place in front of the resource apps as the gateway that starts authentication and checks for cross-site request forgery.SekhuteTK, published 2022-09-09
SAP Job Scheduling Service + Cloud Application Programming Model application (CAP) + SAP Authorization and Trust Management Service (XSUAA)SAP Job Scheduling Service + Cloud Application Programming Model application (CAP) + SAP Authorization and Trust Management Service (XSUAA)Calling an unsecured endpoint on a schedule is trivial; this is the same thing once the endpoint is protected. The interesting part is the caller — the Job Scheduling Service is not a person, so CAP's pseudo-roles are where the post spends its time, and $XSSERVICENAME has to match the scheduler's own instance name.former_member412792, published 2022-12-12
Useful CAP CDS and Fiori Commands to Accelerate Development and DeploymentUseful CAP CDS and Fiori Commands to Accelerate Development and DeploymentA command-by-command walkthrough of @sap/cds-dk's cds add and fiori add generators: cds add xsuaa writes an XSUAA security configuration from the CDS model's authorization annotations, and cds add hana together with cds deploy --to hana switches persistence from the default SQLite database to SAP HANA Cloud. cds add mta and fiori add deploy-config, from @sap/generator-fiori, build the Cloud Foundry deployment descriptor together, adding a destination-service block and an xs-app.json that routes the Fiori app's calls through a named destination.TiaXu, published 2022-10-19
Why developers should care about credential-types for xsuaa?Why developers should care about credential-types for xsuaa?Rotating secrets, argued from a habit rather than a feature: the author names the practice implicit in many beginner tutorials — lifting a secret out of a binding to use it elsewhere — and notes CAP has features that make it unnecessary in development. Then the three credential types side by side, configured on a CAP application's uaa resource in mta.yaml and through a deployment extension.former_member2839, published 2022-07-05
Why developers should care about credential-types for xsuaa?
Authorization has changed twice since this was published, most recently in CAP Java 3.7.1, 2025-01-30. Affects A recipe, Runnable code.
XSUAA Based Authentication - Using Managed ApprouterXSUAA Based Authentication - Using Managed ApprouterOne half of a pair published the same day, both starting from capire's list of authentication kinds and then going end to end on XSUAA. This is the managed approuter route, where the platform runs the router and the application supplies configuration rather than a module.rahul_rajagopal, published 2023-09-25
XSUAA Based Authentication - Using Managed Approuter
Authorization has changed twice since this was published, most recently in CAP Java 3.7.1, 2025-01-30. Affects A recipe.
Change trackingSAP and community
BTP CAP : Custom plugin to separate generic change log capture logicBTP CAP : Custom plugin to separate generic change log capture logicWalks through building a custom [CAP](ecosystem:cap) plugin that centralises change-log capture: on cds.once('served') it collects entities annotated @audit, then hooks srv.before('UPDATE') to read the existing record, diff it field by field against the incoming payload, and record old/new values with the user and timestamp. It also documents a cds build failure packaging the plugin's own directory into gen/srv for MTA deployment, fixed by adding it as a copyfiles build-parameter step in mta.yaml.sreehari_vpillai, published 2023-05-10
Open Sourcing CAP – how to learn more or get involvedOpen Sourcing CAP – how to learn more or get involvedA roundup of CAP's open-sourcing, begun at TechEd the year before, pointing to a webinar recording, a podcast episode and reCAP 2023 talks for background. Among the components it names are a feature toggle library giving Node.js CAP apps live-updatable toggles backed by Redis, a new pluggable database layer with SQLite and PostgreSQL implementations plus a generic SQL layer, and a change tracking component that builds a change history for data from CDS models.Fempel, published 2023-10-02
Data privacySAP only
#SAPCAP: Win Customer Trust using Data Privacy and Protection Services on BTP - Part 1#SAPCAP: Win Customer Trust using Data Privacy and Protection Services on BTP - Part 1First of a three-part series on designing a CAP application on BTP that uses the platform's data privacy services, and this part is the vocabulary before any of it: personal data, the rights a data subject has under GDPR, and the data controller and processor distinction, worked through an order-confirmation SMS example. It names four BTP services: SAP Personal Data Manager, SAP Data Retention Manager, SAP Data Privacy Integration and SAP Audit Log service. Only the first is described, as a service running in the Cloud Foundry environment that finds data subjects across one or more applications and services, makes requests on an individual's behalf about their personal information and forwards them for handling, and notifies individuals which of their personal information is being used or sends them a copy of their record by email; the CAP-side annotations and PDM's own application features follow in Part 2 and Part 3.Ajit_K_Panda, published 2023-03-18
#SAPCAP: Win Customer Trust using Data Privacy and Protection Services on BTP - Part 2#SAPCAP: Win Customer Trust using Data Privacy and Protection Services on BTP - Part 2Walks through wiring a CAP service to SAP's Personal Data Manager (PDM) on BTP: entity, key and field-level @PersonalData annotations that mark data subjects and personal fields, the @PersonalData.IsPotentiallyPersonal / IsPotentiallySensitive distinction that drives audit logging, and the @Communication.Contact annotation PDM needs to search for a data subject. Covers the xsuaa trust arrangement and service binding that let the standalone PDM application call back into the CAP service to read and manage that data. Second of a three-part series; the annotation model it demonstrates is CAP's own mechanism for data privacy compliance, exercised against a sample 'Game Shop' application.Ajit_K_Panda, published 2023-03-18
#SAPCAP: Win Customer Trust using Data Privacy and Protection Services on BTP - Part 3#SAPCAP: Win Customer Trust using Data Privacy and Protection Services on BTP - Part 3Third of a three-part series, this covers the UI side of SAP's Personal Data Manager (PDM) once it is subscribed and wired to a CAP application: a Customer Service Representative searches for a data subject, views the personal data the application's annotations expose, and requests correction, deletion or export on their behalf, while an Operators Clerk processes those requests through to completion. PDM stores none of the personal data itself, only the requests and access logs, which an administrator downloads through the separate Data Transport app. It builds on the annotation model the first two parts introduce, so what it demonstrates is PDM's own delivered UI rather than anything a CAP application must build itself.Ajit_K_Panda, published 2023-03-18
Input validationSAP and community
[Part - 1] Enrich CAP based Services with Behaviors using Annotations[Part - 1] Enrich CAP based Services with Behaviors using AnnotationsWalks through CDS annotations that add behaviour beyond CRUD: @readonly and @insertonly take away write, update or delete on an entity or element, each shown with the OData metadata it generates. @mandatory, @assert.unique, @assert.integrity, @assert.format and @assert.range then enforce input checks that @sap/cds runs on write, with the SQL or HANA constraint @assert.unique compiles to and the error code each rejection returns. It names @restrict and @requires but defers them, calling authorization too large a topic for this post.published 2023-01-28
#CAP-TechBytes Input Validation#CAP-TechBytes Input ValidationThe annotations one at a time — @mandatory, @assert.unique, @assert.range including the enum form, @assert.format — each with what it produces. Ends on error handling, which is the part that decides whether any of it is usable from a UI.Thajunniza, published 2023-07-07
Rate limitingSAP and community
Edge Integration Cell : Design, deploy and manage APIsEdge Integration Cell : Design, deploy and manage APIsWalks through creating an API artifact in API Management on the customer-managed Edge Integration Cell runtime, including the option to generate the artifact by importing an OpenAPI specification rather than from a URL or by hand. It then attaches an Authentication policy and a Quota step capped at four calls per minute, deploys, and shows both the resulting 401 and the quota-breach error in the Monitor logs. The author frames it as the first of a series on Edge Integration Cell's policies.published 2023-11-15
ConfigurationSAP only
Getting started with cds.ql in NodeJS for CAP - 101 on how to query dataGetting started with cds.ql in NodeJS for CAP - 101 on how to query dataWalks through cds.ql, the query API @sap/cds gives a Node.js CAP service's custom handlers, with worked SELECT, UPDATE, DELETE and INSERT examples against a sample schema — filters, AND/OR conditions, column projections, ordering, limiting, grouping and joining two entities through a schema view. An added correction notes that cds.tx(req) is no longer needed to run a query in newer CAP versions, contradicting the post's own original guidance.published 2022-06-21
SAP CAPv7 - Node.js Highlights and ExperiencesSAP CAPv7 - Node.js Highlights and ExperiencesAn account of upgrading a 100+ table CAP Node.js project from v6 to v7, working through breaking changes in @sap/cds 7: event handlers now always receive an array, service paths move under /odata/v4/... unless serve_on_root is set, and cds-serve replaces cds run. It goes deepest on the GraphQL plugin, @cap-js/graphql: the /graphql endpoint it serves, Composition results wrapped in a nodes connection, and offset-based pagination reached through OData's top and skip rather than GraphQL's own limit and offset.published 2023-08-03
Tips for running CAP nodejs in SAP BTPTips for running CAP nodejs in SAP BTPDeliberately not a summary of capire: the author says up front that nothing here repeats the documented best practices, and the subject is configuration for running cloud-natively rather than correctly. Examples target Cloud Foundry, with the claim that they hold for Kyma too.published 2023-06-21
Tips for running CAP nodejs in SAP BTP
Deployment changed in @sap/cds-dk 8.9.0, 2025-03-31. Affects Runnable code.