Merge pull request #601 from radanskoric/fix-nested-embed-in-root

Fix for nested embed_in_root when serializer used as part of an association

test/unit/active_model/serializer/has_many_test.rb

@@ -115,6 +115,23 @@ module ActiveModel
         }, @post_serializer.as_json)
       end
 
+      def test_associations_embedding_ids_including_objects_serialization_when_invoked_from_parent_serializer
+        @association.embed = :ids
+        @association.embed_in_root = true
+
+        category = Category.new(name: 'Name 1')
+        category.instance_variable_set(:@posts, [@post])
+        category_serializer = CategorySerializer.new(category)
+
+        assert_equal({
+          'category' => {
+            name: 'Name 1',
+            posts: [{ title: 'Title 1', body: 'Body 1', 'comment_ids' => @post.comments.map { |c| c.object_id } }]
+          },
+          comments: [{ content: 'C1' }, { content: 'C2' }]
+        }, category_serializer.as_json)
+      end
+
       def test_associations_embedding_nothing_including_objects_serialization_using_as_json
         @association.embed = nil
         @association.embed_in_root = true

test/unit/active_model/serializer/has_one_test.rb

@@ -131,6 +131,20 @@ module ActiveModel
         }, @user_serializer.as_json)
       end
 
+      def test_associations_embedding_ids_including_objects_serialization_when_invoked_from_parent_serializer
+        @association.embed = :ids
+        @association.embed_in_root = true
+
+        user_info = UserInfo.new
+        user_info.instance_variable_set(:@user, @user)
+        user_info_serializer = UserInfoSerializer.new(user_info)
+
+        assert_equal({
+          'user_info' => { user: { name: 'Name 1', email: 'mail@server.com', 'profile_id' => @user.profile.object_id } },
+          'profiles' => [{ name: 'N1', description: 'D1' }]
+        }, user_info_serializer.as_json)
+      end
+
       def test_associations_embedding_ids_using_a_given_serializer
         @association.embed = :ids
         @association.embed_in_root = true