Setting Default Values for Create in ABAP RESTful application development

[kchatch1]

Hello,

Using the ABAP RESTful approach (https://help.sap.com/docs/abap-cloud/abap-rap/abap-restful-application-programming-model) I have implemented an app using root entity CDS view, metadata extension, behavior definition, service definition, and service binding.  

Everything works fine, but I am unable to figure out how to implement DEFAULT values for fields when I click the CREATE button.  I have a local helper class that is handling auto numbering just fine (using class for getting a GUID) and it also populates values for fields ON CREATE execution using a determination.  But I also need DEFAULT values populated when I INITIALLY click CREATE.  

The approach of using "action" does not work ... it does not populate any values initially.  

Please provide the behavior definition entry as well as the class ABAP code for defaulting values. 

Thanks,

Kevin 

[Rajeshwari_09]

I am trying out something similar. but not found any useful resource yet.

[JessieCheah · Accepted solution]

Hi Kevin,

if you are working on BTP ABAP Environment release 2311, you can use default values function to set default values for create, CBA, action and functions. Please refer to https://help.sap.com/docs/abap-cloud/abap-rap/operation-defaulting , there is also an example linked at the bottom of the page.

SAP S/4HANA Cloud, public edition will get this feature soon but OnPrem will take longer.

Regards,
Jessie

[Archish · Accepted solution]

OnPrem will be 2025 release? or there is a hope with any upcoming 2023 feature packs?

Regards,

Archish

[TiagoAlmeida · Accepted solution]

Hi, Thanks for sharing. What is the solution for onprem on lower versions ? When trying to use this feature we get an error ' "association create / default function" is not supported in this ABAP release. ' . This feels like such a basic requirement. Is there any alternative to default values of a child entity? Thank you in advance

[klbi]

For anyone else landing in here, in hopes of finding the answer to how you can add initial/default values to your entity (f.ex. for hiding fields, or defaulting types, etc) - currently there's no way to achieve this on-prem, in an unmanaged scenario, in your behavior pool class - or in metadata on your cds views...

The only way I could find, to achieve this requirement - was to add a controller extension to your Fiori Elements app / object page, and adding something along the lines of the following snipplet of code to it:

        onInit: function() {
            this.extensionAPI.attachPageDataLoaded($.proxy(this.onPageLoaded, this)); 
        },

        onPageLoaded: function(oEvent){
            if(this.getView().getModel("ui").getProperty("/createMode")) {
                var ctx = this.getView().getBindingContext();
                ctx.getModel().setProperty(ctx.getPath() + "/<Property>", <value>);
            }
        }

[Claudia_D]

I have on-prem with managed scenario. Can I use your code snipplet?

[Claudia_D]

I use Visual Studio Code. Where I have to insert the code snipplet? In which file?

[klbi]

@Claudia_D , first you need to declare a controller extension; like so - in manifest.json:

"sap.ui5": {
  "extends": {
    "extensions": {
      "sap.ui.controllerExtensions": {
        "sap.suite.ui.generic.template.ObjectPage.view.Details": {
          "controllerName": "mycomponent.ext.controller.MyEntityExt" 

Then you create a new file, MyEntityExt.controller.js in the ext/controller folder of your project, and give it the following contents:

sap.ui.define([
	"sap/suite/ui/generic/template/extensionAPI/extensionAPI"
], function( extensionAPI ) {
	"use strict";
    return sap.ui.controller("mycomponent.ext.controller.MyEntityExt", {
        onInit: function() {
            this.extensionAPI.attachPageDataLoaded($.proxy(this.onPageLoaded, this)); 
        },
        onPageLoaded: function(oEvent){
.... as I wrote earlier.