fix: set objects in afterFind triggers (#7311)

spec/ParseLiveQuery.spec.js

@@ -358,6 +358,44 @@ describe('ParseLiveQuery', function () {
     await object.save();
   });
 
+  it('can handle afterEvent set pointers', async done => {
+    await reconfigureServer({
+      liveQuery: {
+        classNames: ['TestObject'],
+      },
+      startLiveQueryServer: true,
+      verbose: false,
+      silent: true,
+    });
+
+    const object = new TestObject();
+    await object.save();
+
+    const secondObject = new Parse.Object('Test2');
+    secondObject.set('foo', 'bar');
+    await secondObject.save();
+
+    Parse.Cloud.afterLiveQueryEvent('TestObject', async ({ object }) => {
+      const query = new Parse.Query('Test2');
+      const obj = await query.first();
+      object.set('obj', obj);
+    });
+
+    const query = new Parse.Query(TestObject);
+    query.equalTo('objectId', object.id);
+    const subscription = await query.subscribe();
+    subscription.on('update', object => {
+      expect(object.get('obj')).toBeDefined();
+      expect(object.get('obj').get('foo')).toBe('bar');
+      done();
+    });
+    subscription.on('error', () => {
+      fail('error should not have been called.');
+    });
+    object.set({ foo: 'bar' });
+    await object.save();
+  });
+
   it('can handle async afterEvent modification', async done => {
     await reconfigureServer({
       liveQuery: {