From a110df6caf79fe0e79ef61c364542a722063f14d Mon Sep 17 00:00:00 2001
From: Jason Truluck <jason.truluck@gmail.com>
Date: Tue, 12 Nov 2013 12:57:31 -0500
Subject: [PATCH] Add @options back into serializers to maintain the
 functionality of render :json as noted in the docs

This functionality used to exist in v0.8.1. This adds the ability to
pass other options that will be usable in the serializer via the
options accessor.

This works by adding an attr_accessor for options so it is available
and is set by the remaining options in the provided options hash during
initialization.
---
 lib/active_model/array_serializer.rb            |  2 +-
 lib/active_model/serializer.rb                  |  3 ++-
 .../active_model/serializer/options_test.rb     | 17 +++++++++++++++++
 3 files changed, 20 insertions(+), 2 deletions(-)
 create mode 100644 test/unit/active_model/serializer/options_test.rb

diff --git a/lib/active_model/array_serializer.rb b/lib/active_model/array_serializer.rb
index ce73ece1b..54278ea8a 100644
--- a/lib/active_model/array_serializer.rb
+++ b/lib/active_model/array_serializer.rb
@@ -20,7 +20,7 @@ def initialize(object, options={})
       @each_serializer = options[:each_serializer]
       @options         = options.merge(root: nil)
     end
-    attr_accessor :object, :root, :meta_key, :meta
+    attr_accessor :object, :root, :meta_key, :meta, :options
 
     def json_key
       if root.nil?
diff --git a/lib/active_model/serializer.rb b/lib/active_model/serializer.rb
index b0563beec..c582128a4 100644
--- a/lib/active_model/serializer.rb
+++ b/lib/active_model/serializer.rb
@@ -106,8 +106,9 @@ def initialize(object, options={})
       @root     = options.fetch(:root, self.class._root)
       @meta_key = options[:meta_key] || :meta
       @meta     = options[@meta_key]
+      @options  = options.reject{|k,v| [:scope, :root, :meta_key, :meta].include?(k) }
     end
-    attr_accessor :object, :scope, :meta_key, :meta, :root
+    attr_accessor :object, :scope, :meta_key, :meta, :root, :options
 
     def json_key
       if root == true || root.nil?
diff --git a/test/unit/active_model/serializer/options_test.rb b/test/unit/active_model/serializer/options_test.rb
new file mode 100644
index 000000000..b064f3107
--- /dev/null
+++ b/test/unit/active_model/serializer/options_test.rb
@@ -0,0 +1,17 @@
+require 'test_helper'
+
+module ActiveModel
+  class Serializer
+    class OptionsTest < ActiveModel::TestCase
+      def setup
+        @profile = Profile.new({ name: 'Name 1', description: 'Description 1', comments: 'Comments 1' })
+      end
+
+      def test_meta
+        profile_serializer = ProfileSerializer.new(@profile, root: 'profile', random_option: "This is an option")
+
+        assert_equal("This is an option", profile_serializer.options[:random_option])
+      end
+    end
+  end
+end