Add AMS support to AR objects

Gemfile

@@ -0,0 +1,6 @@
+source 'https://rubygems.org'
+
+# Specify gem dependencies in active_model_serializers.gemspec
+gemspec
+
+gem "sqlite3"

lib/active_model_serializers.rb

@@ -11,3 +11,9 @@ begin
 rescue LoadError
   # rails not installed, continuing
 end
+
+[:active_record, :mongoid].each do |orm|
+  ActiveSupport.on_load(orm) do
+    include ActiveModel::SerializerSupport
+  end
+end

test/fixtures/active_record.rb

@@ -0,0 +1,20 @@
+require 'active_record'
+
+ActiveRecord::Base.establish_connection(
+  :adapter  => 'sqlite3',
+  :database => ':memory:'
+)
+
+ActiveRecord::Schema.define do
+  create_table :ar_models, :force => true do |t|
+    t.string :attr1
+    t.string :attr2
+  end
+end
+
+class ARModel < ActiveRecord::Base
+end
+
+class ARModelSerializer < ActiveModel::Serializer
+  attributes :attr1, :attr2
+end

test/test_helper.rb

@@ -1,7 +1,7 @@
 require 'bundler/setup'
 require 'newbase/active_model_serializers'
 require 'test/unit'
-require 'newbase/fixtures'
+require 'newbase/fixtures/poro'
 
 module TestHelper
   Routes = ActionDispatch::Routing::RouteSet.new

test/unit/active_model/serializer_support/active_record_test.rb

@@ -0,0 +1,13 @@
+require 'newbase/test_helper'
+require 'newbase/fixtures/active_record'
+require 'newbase/active_model/serializer_support'
+
+module ActiveModel
+  module SerializerSupport
+    class Test < ActiveModel::TestCase
+      def test_active_model_returns_its_serializer
+        assert_equal ARModelSerializer, ARModel.new.active_model_serializer
+      end
+    end
+  end
+end

test/unit/active_model/serializer_support/poro_test.rb

@@ -4,7 +4,7 @@ require 'newbase/active_model/serializer_support'
 module ActiveModel
   module SerializerSupport
     class Test < ActiveModel::TestCase
-      def test_active_model_returns_its_serializer
+      def test_active_model_on_poro_returns_its_serializer
         assert_equal ModelSerializer, Model.new.active_model_serializer
       end
     end