Deprecate target field and make targetRef required

Signed-off-by: kmarkow <kamilmarkow@gmail.com>

.changeset/sour-papayas-wink.md

@@ -0,0 +1,5 @@
+---
+'@backstage/catalog-model': minor
+---
+
+Deprecate target field and make targetRef required in common.schema.json

.github/vale/Vocab/Backstage/accept.txt

@@ -361,6 +361,7 @@ SVGs
 talkdesk
 Talkdesk
 Tanzu
+targetRef
 tasklist
 techdocs
 Telenor

packages/catalog-model/src/schema/shared/common.schema.json

@@ -32,7 +32,7 @@
       "$id": "#relation",
       "type": "object",
       "description": "A directed relation from one entity to another.",
-      "required": ["type", "target"],
+      "required": ["type", "targetRef"],
       "additionalProperties": false,
       "properties": {
         "type": {
@@ -42,7 +42,8 @@
           "description": "The type of relation."
         },
         "target": {
-          "$ref": "#reference"
+          "$ref": "#reference",
+          "deprecated": true
         },
         "targetRef": {
           "type": "string",

packages/catalog-model/src/validation/entityKindSchemaValidator.test.ts

@@ -51,7 +51,11 @@ describe('entityKindSchemaValidator', () => {
         owner: 'me',
       },
       relations: [
-        { type: 't', target: { kind: 'k', namespace: 'ns', name: 'n' } },
+        {
+          type: 't',
+          targetRef: 'someTargetRef',
+          target: { kind: 'k', namespace: 'ns', name: 'n' },
+        },
       ],
       status: {
         items: [

packages/catalog-model/src/validation/entitySchemaValidator.test.ts

@@ -52,7 +52,11 @@ describe('entitySchemaValidator', () => {
         owner: 'me',
       },
       relations: [
-        { type: 't', target: { kind: 'k', namespace: 'ns', name: 'n' } },
+        {
+          type: 't',
+          targetRef: 'someTargetRef',
+          target: { kind: 'k', namespace: 'ns', name: 'n' },
+        },
       ],
       status: {
         items: [
@@ -361,8 +365,13 @@ describe('entitySchemaValidator', () => {
     expect(() => validator(entity)).toThrow(/relations/);
   });
 
-  it('rejects missing relations.target', () => {
+  it('does not reject missing relations.target', () => {
     delete entity.relations[0].target;
+    expect(() => validator(entity)).not.toThrow(/relations/);
+  });
+
+  it('does reject missing relations.targetRef', () => {
+    delete entity.relations[0].targetRef;
     expect(() => validator(entity)).toThrow(/relations/);
   });