Consider @changelog: false on an entity level

Author: schiwekM

cds-plugin.js

@@ -7,6 +7,7 @@ const hasParent = 'change-tracking-parentEntity';
 
 const isChangeTracked = (entity) => {
 	if (entity.query?.SET?.op === 'union') return false; // REVISIT: should that be an error or warning?
+	if (entity['@changelog'] === false) return false;
 	if (entity['@changelog']) return true;
 	if (Object.values(entity.elements).some((e) => e['@changelog'])) return true;
 	return false;

tests/bookshop/srv/feature-testing.cds

@@ -2,6 +2,7 @@ using {sap.change_tracking as my} from '../db/index';
 using {sap.changelog as change} from '@cap-js/change-tracking';
 
 service VariantTesting {
+  @cds.redirection.target
   entity DifferentFieldTypes as projection on my.DifferentFieldTypes;
 
   entity RootSample as projection on my.RootSample;
@@ -15,4 +16,7 @@ service VariantTesting {
 
   entity ChangeView as projection on change.ChangeView;
 
+  @changelog: false
+  entity NotTrackedDifferentFieldTypes as projection on my.DifferentFieldTypes;
+
 }

tests/integration/configuration.test.js

@@ -2,7 +2,7 @@ const cds = require('@sap/cds');
 const path = require('path');
 
 const bookshop = path.resolve(__dirname, './../bookshop');
-const { POST, DELETE, GET } = cds.test(bookshop);
+const { POST, PATCH, DELETE, GET } = cds.test(bookshop);
 
 describe('Configuration scenarios', () => {
 	it('When preserveDeletes is enabled, all changelogs should be retained after the root entity is deleted, and a changelog for the deletion operation should be generated', async () => {
@@ -180,6 +180,28 @@ describe('Configuration scenarios', () => {
 			expect(changes2.length).toEqual(1);
 		});
 	});
+
+	it('Should not track if entity is annotated @changelog: false', async () => {
+		const { data: record } = await POST(`/odata/v4/variant-testing/DifferentFieldTypes`, {
+			number: 1,
+			bool: true,
+			title: 'My test-record'
+		});
+
+		await PATCH(`/odata/v4/variant-testing/NotTrackedDifferentFieldTypes(ID=${record.ID})`, {
+			number: 2,
+			bool: false
+		});
+
+		const {
+			data: { value: changes }
+		} = await GET(`/odata/v4/variant-testing/NotTrackedDifferentFieldTypes(ID=${record.ID})/changes`);
+
+		const createChanges = changes.filter((c) => c.modification === 'Create');
+		const updateChanges = changes.filter((c) => c.modification === 'Update');
+		expect(createChanges.length).toEqual(2);
+		expect(updateChanges.length).toEqual(0);
+	});
 });
 
 describe('MTX Build', () => {