Everything in CAP / Java
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Java: Answers in Java
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Schema evolutionCommunity only
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 (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.
DeploymentCommunity only
#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.
Build and deploy a CAP Project Node.js API with a SAP Fiori Elements UI and a managed approuter configurationBuild and deploy a CAP Project Node.js API with a SAP Fiori Elements UI and a managed approuter configurationGeneration and deployment in one piece, with the managed approuter rather than a standalone one — so the routing is configuration instead of a module, and the post covers what that changes at deploy time.jlong, published 2022-02-10
Build and deploy a CAP Project Node.js API with a SAP Fiori Elements UI and a managed approuter configuration
Fiori annotations changed in @sap/cds-dk 9.6.0, 2025-12-17. Affects A recipe, Runnable code.
CAP on Kyma - Deploy your CAP apps to SAP BTP, Kyma RuntimeCAP on Kyma - Deploy your CAP apps to SAP BTP, Kyma RuntimeThe post that superseded the author's own earlier one, written for cds and cds-dk 6 when Kyma deployment became something the tooling did rather than something you assembled. The current reference of the several Kyma posts here.Uwe_Klinger, published 2022-07-12
CAP on Kyma - Deploy your CAP apps to SAP BTP, Kyma Runtime
Deployment changed in @sap/cds-dk 8.9.0, 2025-03-31. Affects A recipe, Runnable code.
cf-create-app: Create End-to-End apps and deploy to Cloud Foundry in minutescf-create-app: Create End-to-End apps and deploy to Cloud Foundry in minutesA generator from 2020 that goes further than scaffolding — an end-to-end application created and deployed to Cloud Foundry in one run. Predates most of what cds add now does.former_member604013, published 2020-07-29
cf-create-app: Create End-to-End apps and deploy to Cloud Foundry in minutes
Generators has changed twice since this was published, most recently in @sap/cds-dk 10.0.3, 2026-07-02. Affects A recipe, Runnable code.
From Concept to action: Hands-On with the CAP Operator and the Partner Reference ApplicationFrom Concept to action: Hands-On with the CAP Operator and the Partner Reference ApplicationThe CAP Operator applied to a real application rather than a sample of its own — SAP's Partner Reference Application, taken from plugin integration through containerisation to custom resources. The transition to CRDs is the part that repays attention: it is where the deployment stops being an mta and becomes Kubernetes.ChristianWeiss, published 2026-05-21
From R/3 ABAP to CAP/Fiori Elements on SAP BTP- DeploymentFrom R/3 ABAP to CAP/Fiori Elements on SAP BTP- DeploymentThe doing half: the steps and the code that got the application from the first post deployed and working. Shorter, and it assumes the argument has already been made.former_member231477, published 2021-04-30
From R/3 ABAP to CAP/Fiori Elements on SAP BTP- Deployment
Fiori annotations changed in @sap/cds-dk 9.6.0, 2025-12-17. Affects Runnable code.
Speed up deployment for CAP using TurborepoSpeed up deployment for CAP using TurborepoImpatience as a method: minutes of waiting on MBT and cf deploy sent the author looking for alternatives. It is fair to MBT first — a wrapper doing the whole deployment in one go, creating services and applications along the way — before showing what Turborepo changes about the build half. The trade it makes is explicit rather than assumed.published 2024-12-06
Speed up deployment for CAP using Turborepo
Deployment changed in @sap/cds-dk 8.9.0, 2025-03-31. Affects Runnable code.
SQLite as database for a multi-target (/productive) CAP ApplicationSQLite as database for a multi-target (/productive) CAP ApplicationOpens with "Not recommended but possible", and then names the two cases where it is the right call anyway: a showcase, and a landscape with no HANA Cloud available. The caveat is the content.Christopher_Ketzler, published 2024-07-05
SQLite as database for a multi-target (/productive) CAP Application
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: Deployment to SAP BTP, Kyma runtimeSurviving and Thriving with the SAP Cloud Application Programming Model: Deployment to SAP BTP, Kyma runtimeAn episode of the author's #CAPTricks series, and it reads like one — long, opinionated, and organised around the things that actually go wrong on the way to a deployed CAP application rather than around the documented happy path.maxstreifeneder, published 2023-03-07
Surviving and Thriving with the SAP Cloud Application Programming Model: Deployment to SAP BTP, Kyma runtime
Deployment changed in @sap/cds-dk 8.9.0, 2025-03-31. Affects A recipe, Runnable code.
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.
LintingCommunity only
Introducing eslint-plugin-better-cap-config an ESLint plugin to improve CAP configurationIntroducing eslint-plugin-better-cap-config an ESLint plugin to improve CAP configurationThe author's own announcement, and precise about scope: today it catches deprecated key/value entries in CAP's JSON configuration, and the ambition is that it grows into best practices, suggestions and autofixes the way any ESLint plugin does. The implementation detail worth knowing is that it uses modern ESLint's JSON language support rather than a generic parser, which is what makes linting a configuration file rather than source code work at all.published 2025-09-08
Seed dataCommunity only
Avoid design time CAP server restarts when maintaining local data filesAvoid design time CAP server restarts when maintaining local data filescds watch restarting on every file change is the feature; this is the case where it is not. Editing a CSV seed file mid-edit restarts the server against half-finished data, and the post is about suppressing that without giving up the watch loop. A small friction most people work around silently rather than fix.published 2024-04-26
Avoid design time CAP server restarts when maintaining local data files
Local development changed in @sap/cds-dk 7.9.1, 2024-05-02. Affects Runnable code.
Avoiding Data Loss When Loading Initial Data with CSV Files in CAPAvoiding Data Loss When Loading Initial Data with CSV Files in CAPcds add tiny-sample gives you a CSV in db/data and it loads on deploy, which looks like a way to seed a productive application. The catch, stated plainly: change the CSV or the schema and HANA is reinitialised from the file, taking whatever users had entered with it.MioYasutake, published 2025-09-15
Handling CSV Data Deployment in CAP HDI Without Data LossHandling CSV Data Deployment in CAP HDI Without Data LossThe same trap from the HDI side: .hdbtabledata hands the container full ownership of the data, so the next deployment overwrites the table from the file. Two independent posts three months apart on the same sharp edge, which is a fair signal about how sharp it is.Sekar_Somasundaram, published 2025-06-04
ISO content for common CAP typesISO content for common CAP typesThe npm package that supplies ISO-standard content — countries, languages, currencies, timezones — for CAP's common types, and how it works underneath. The author flags the length and the reason for it up front, having followed the mechanism further than the question required, which is what makes it worth reading rather than a package announcement.published 2024-03-14
ISO content for common CAP types
Seed data changed in @sap/cds-dk 7.9.1, 2024-05-02. Affects Runnable code.
Reference appsCommunity only
An Innovative Language Exchange App developed with SAP Build Apps, CAP, Kyma, and OpenAIAn Innovative Language Exchange App developed with SAP Build Apps, CAP, Kyma, and OpenAIA dormant internal app at SAP Japan revived with AI, built to solve a problem the team actually had — colleagues who could not talk to each other. Build Apps on the front, CAP on Kyma behind it, OpenAI in the middle.javieryw, published 2024-01-31
An Innovative Language Exchange App developed with SAP Build Apps, CAP, Kyma, and OpenAI
LLM integration changed in @cap-js/ai 1.0.0, 2026-04-28. Affects Runnable code.
From Concept to action: Hands-On with the CAP Operator and the Partner Reference ApplicationFrom Concept to action: Hands-On with the CAP Operator and the Partner Reference ApplicationThe CAP Operator applied to a real application rather than a sample of its own — SAP's Partner Reference Application, taken from plugin integration through containerisation to custom resources. The transition to CRDs is the part that repays attention: it is where the deployment stops being an mta and becomes Kubernetes.ChristianWeiss, published 2026-05-21
Full Stack TypeScript App for Cloud Foundry - Sample RepositoryFull Stack TypeScript App for Cloud Foundry - Sample RepositoryA whole repository rather than a snippet: a CAP Node.js service and a freestyle SAPUI5 application, both in TypeScript, arranged for Cloud Foundry. The build process gets its own section, which is where a TypeScript full-stack project usually goes wrong.former_member66, published 2021-12-09
Full Stack TypeScript App for Cloud Foundry - Sample Repository
TypeScript patterns changed in @cap-js/cds-typer 0.5.0, 2023-07-25. Affects A recipe, Runnable code.
The CAPstone Project: A Journey from Component to CloudThe CAPstone Project: A Journey from Component to CloudA React and Vite front end on a CAP backend, written for two readers at once — the React developer curious about SAP, and the CAP developer wondering about modern front ends. Predates CAP's own React and Vue support.LOKESH_GHOSH, published 2025-07-05
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.