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Domain: Protocols & APIs
Signals
Content: 2024
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Group by: Capability
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Don't "let it crash", is this the new CAP guideline?Don't "let it crash", is this the new CAP guideline?Dinu traces a change in error handling in CAP's Node.js runtime: @sap/cds@8.2.0 adds a cds.server.shutdown_on_uncaught_errors config flag, defaulting to true, but invoking an operation with an undefined variable no longer takes the server down, with or without the flag, where the same code crashed it on cds@6 and cds@7, and the author notes the old behaviour was already missing in cds@8.1. It still crashes with features.odata_new_adapter turned off to use the old OData parser, so it is the new OData adapter, like the REST adapter before it, that answers an uncaught error with a 500 instead of taking the process down.Dinu, published 2024-09-06
SAP: Email Functionality in SAP with a Custom Function ModuleSAP: Email Functionality in SAP with a Custom Function ModuleA custom ABAP function module, ZFM_SEND_EMAIL, sends mail through Business Communication Services' CL_BCS and CL_DOCUMENT_BCS classes, adding TO/CC/BCC recipients and multiple attachments by building the HTML document in application code on top of what CL_BCS delivers, which is how ABAP's notifications capability describes mail going out. The send sits in a TRY structure whose three CATCH blocks for CL_BCS's class-based exceptions are empty, so what reaches the caller is a BAPIRET2 table that BAPI_MESSAGE_GETDETAIL fills on the paths without an exception: no recipients given, sent to all, or not sent. That conversion into a caller-facing message table is what ABAP's error handling capability leaves to the application.Surendra_Karma, published 2024-12-16
Usage of Expand Entity in OData Service Consumption ModelUsage of Expand Entity in OData Service Consumption ModelExplains how to use OData's $Expand option when SAP BTP, ABAP Environment consumes a remote service through a generated client proxy, the way HTTP clients describes it, using stubs ABAP Development Tools for Eclipse generates from the service's $metadata. The expanded association only comes back from get_business_data when the caller supplies its own ABAP type that redeclares the association as a nested table, in place of the generated CDS entity type. The same workaround still applies from release 2311 on, where the consumption model generates flat ABAP types rather than abstract CDS entities.alrikx, published 2024-02-08
CAP, CDS, CDL, CSN and jq - finding associationsCAP, CDS, CDL, CSN and jq - finding associationsHow associations are actually represented once CDL is compiled into CSN, worked out by parsing the machine-readable form with jq. Useful less as a recipe than as a way in: anything that wants to reason about a CDS model without the compiler has to read CSN, and this is what that looks like from the outside.published 2024-04-16
Calling bound / unbound CAP actions from Fiori elements application.Calling bound / unbound CAP actions from Fiori elements application.invokeAction from the Fiori elements Edit flow API, with the difference between bound and unbound actions spelled out first because the call shape differs. Under three thousand characters and it answers exactly one question.vidhyasagarmule, published 2024-09-07
Graph intro series, part 8: Use Graph With OData v4Graph intro series, part 8: Use Graph With OData v4Part eight of the Graph intro series works through querying SAP Graph's unified business data graph over OData v4: inspecting the $metadata EDMX document for an entity type such as SalesQuote, then shaping the response with $select and nested $expand across navigation properties, and paging a collection with $filter, $orderby, $top and $skip. It stays with the protocol mechanics against the Graph sandbox endpoint rather than any one client library.florian_moritz, published 2024-03-19
SAP CAP(Cloud Application Programming)开发框架概述SAP CAP(Cloud Application Programming)开发框架概述A Chinese-language walkthrough of CAP built mainly from CAPire's own "About CAP" page: CDS entities, associations, compositions and aspects for data modelling, with an extend Books with @restrict: [{ grant:'WRITE', to:'admin' }] aspect as its authorization example; CQL and CQN queries shown against both a local service and OData's $select/$expand; and the service-and-event model — this.on, this.emit, srv.on — that carries CAP's async processing. It closes with the author's own setup: installing @sap/cds-dk, scaffolding a bookshop project with cds init, and running it with cds watch against local SQLite, mocked authentication and file-based messaging standing in for HANA Cloud, IAS and Kafka.ArthurYang, published 2024-01-07