From e5ccb8e4dd3d0d4cbd61e881118773258d8279e7 Mon Sep 17 00:00:00 2001
From: Marek Pietrucha <marek@enginearch.com>
Date: Mon, 6 Jul 2015 16:50:25 +0200
Subject: [PATCH] root option is working (fixed #986)

---
 lib/active_model/serializer.rb |  2 +-
 test/serializers/root_test.rb  | 19 +++++++++++++++++++
 2 files changed, 20 insertions(+), 1 deletion(-)
 create mode 100644 test/serializers/root_test.rb

diff --git a/lib/active_model/serializer.rb b/lib/active_model/serializer.rb
index 4a5f9668..9f62e615 100644
--- a/lib/active_model/serializer.rb
+++ b/lib/active_model/serializer.rb
@@ -169,7 +169,7 @@ module ActiveModel
     end
 
     def json_key
-      self.class.root_name
+      @root || self.class.root_name
     end
 
     def id
diff --git a/test/serializers/root_test.rb b/test/serializers/root_test.rb
new file mode 100644
index 00000000..05853e39
--- /dev/null
+++ b/test/serializers/root_test.rb
@@ -0,0 +1,19 @@
+require 'test_helper'
+
+module ActiveModel
+  class Serializer
+    class RootTest < Minitest::Test
+
+      def setup
+        @profile = Profile.new({ name: 'Name 1', description: 'Description 1', comments: 'Comments 1' })
+        @profile_serializer = ProfileSerializer.new(@post, {root: 'smth'})
+      end
+
+      def test_overwrite_root
+        setup
+        assert_equal('smth', @profile_serializer.json_key)
+      end
+
+    end
+  end
+end