From 970b542549ee4aeb2ee4215f89e77aab8f975273 Mon Sep 17 00:00:00 2001
From: Steve Klabnik <steve@steveklabnik.com>
Date: Wed, 9 Jul 2014 17:52:31 -0400
Subject: [PATCH] Implement basic rendering

Woo actioncontroller
---
 lib/action_controller/serialization.rb        | 24 ++++++++++++++++++
 lib/active_model/serializer.rb                | 22 ++++++++++++++++
 .../serializer/adapter/null_adapter.rb        |  4 +--
 lib/active_model_serializers.rb               | 11 ++++++++
 test/action_controller/serialization_test.rb  | 25 +++++++++++++++++++
 test/test_helper.rb                           | 18 +++++++++++++
 6 files changed, 102 insertions(+), 2 deletions(-)
 create mode 100644 lib/action_controller/serialization.rb
 create mode 100644 test/action_controller/serialization_test.rb

diff --git a/lib/action_controller/serialization.rb b/lib/action_controller/serialization.rb
new file mode 100644
index 00000000..d51aba0f
--- /dev/null
+++ b/lib/action_controller/serialization.rb
@@ -0,0 +1,24 @@
+require 'active_support/core_ext/class/attribute'
+
+module ActionController
+  module Serialization
+    extend ActiveSupport::Concern
+
+    include ActionController::Renderers
+
+    def _render_option_json(resource, options)
+      serializer = ActiveModel::Serializer.serializer_for(resource)
+
+      if serializer
+        # omg hax
+        object = serializer.new(resource)
+        adapter = ActiveModel::Serializer::Adapter::NullAdapter.new(object)
+
+        super(adapter, options)
+      else
+        super
+      end
+    end
+  end
+end
+
diff --git a/lib/active_model/serializer.rb b/lib/active_model/serializer.rb
index 0216861b..610bc596 100644
--- a/lib/active_model/serializer.rb
+++ b/lib/active_model/serializer.rb
@@ -19,6 +19,28 @@ module ActiveModel
       end
     end
 
+    if RUBY_VERSION >= '2.0'
+      def self.serializer_for(resource)
+        if resource.respond_to?(:to_ary)
+          ArraySerializer
+        else
+          begin
+            Object.const_get "#{resource.class.name}Serializer"
+          rescue NameError
+            nil
+          end
+        end
+      end
+    else
+      def self.serializer_for(resource)
+        if resource.respond_to?(:to_ary)
+          ArraySerializer
+        else
+          "#{resource.class.name}Serializer".safe_constantize
+        end
+      end
+    end
+
     attr_accessor :object
 
     def initialize(object)
diff --git a/lib/active_model/serializer/adapter/null_adapter.rb b/lib/active_model/serializer/adapter/null_adapter.rb
index dc343c22..9e310de4 100644
--- a/lib/active_model/serializer/adapter/null_adapter.rb
+++ b/lib/active_model/serializer/adapter/null_adapter.rb
@@ -6,10 +6,10 @@ module ActiveModel
           @serializer = serializer
         end
 
-        def to_json
+        def to_json(options={})
           @serializer.attributes.each_with_object({}) do |(attr, value), h|
             h[attr] = value
-          end.to_json
+          end.to_json # FIXME: why does passing options here cause {}?
         end
       end
     end
diff --git a/lib/active_model_serializers.rb b/lib/active_model_serializers.rb
index 27c254ba..ae6a3cd4 100644
--- a/lib/active_model_serializers.rb
+++ b/lib/active_model_serializers.rb
@@ -4,3 +4,14 @@ require "active_model/serializer/version"
 require "active_model/serializer"
 
 require "active_model/serializer/adapter/null_adapter"
+
+begin
+  require 'action_controller'
+  require 'action_controller/serialization'
+
+  ActiveSupport.on_load(:action_controller) do
+    include ::ActionController::Serialization
+  end
+rescue LoadError
+  # rails not installed, continuing
+end
diff --git a/test/action_controller/serialization_test.rb b/test/action_controller/serialization_test.rb
new file mode 100644
index 00000000..c4ee3497
--- /dev/null
+++ b/test/action_controller/serialization_test.rb
@@ -0,0 +1,25 @@
+require 'test_helper'
+
+module ActionController
+  module Serialization
+    class ImplicitSerializerTest < ActionController::TestCase
+      class MyController < ActionController::Base
+        def render_using_implicit_serializer
+          render json: Profile.new({ name: 'Name 1', description: 'Description 1', comments: 'Comments 1' })
+        end
+      end
+
+      tests MyController
+
+      # We just have Null for now, this will change
+      def test_render_using_implicit_serializer
+        get :render_using_implicit_serializer
+
+        assert_equal 'application/json', @response.content_type
+        assert_equal '{"name":"Name 1","description":"Description 1"}', @response.body
+      end
+    end
+  end
+end
+
+
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 8cb71ca3..3fd3776c 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -1,9 +1,27 @@
 require "bundler/setup"
 
 require 'rails'
+require 'action_controller'
+require 'action_controller/test_case'
 require "active_support/json"
 require 'minitest/autorun'
 
 require "active_model_serializers"
 
 require 'fixtures/poro'
+
+module TestHelper
+  Routes = ActionDispatch::Routing::RouteSet.new
+  Routes.draw do
+    get ':controller(/:action(/:id))'
+    get ':controller(/:action)'
+  end
+
+  ActionController::Base.send :include, Routes.url_helpers
+end
+
+ActionController::TestCase.class_eval do
+  def setup
+    @routes = TestHelper::Routes
+  end
+end