Merge pull request #1244 from opf/fix/ruby_2.1.1_hash_select_and_reject

Add patch to fix Rails' hash types with Ruby 2.1.1

config/initializers/10-patches.rb

@@ -233,6 +233,41 @@ module ActiveRecord
   end
 end
 
+
+# Patches to fix Hash subclasses not preserving the class on reject and select
+# on Ruby 2.1.1. Apparently this will be standard behavior in Ruby 2.2, so
+# check please verify things work as expected before removing this.
+#
+# Rails 3.2 won't receive a fix for this, but Rails 4.x has this fixed.
+# Once we're using Rails 4, we can probably remove this.
+#
+# See
+# * https://www.ruby-lang.org/en/news/2014/03/10/regression-of-hash-reject-in-ruby-2-1-1/
+# * https://github.com/rails/rails/issues/14188
+# * https://github.com/rails/rails/pull/14198/files
+module ActiveSupport
+  class HashWithIndifferentAccess
+    def select(*args, &block)
+      dup.tap { |hash| hash.select!(*args, &block) }
+    end
+
+    def reject(*args, &block)
+      dup.tap { |hash| hash.reject!(*args, &block) }
+    end
+  end
+
+  class OrderedHash
+    def select(*args, &block)
+      dup.tap { |hash| hash.select!(*args, &block) }
+    end
+
+    def reject(*args, &block)
+      dup.tap { |hash| hash.reject!(*args, &block) }
+    end
+  end
+end
+
+
 module CollectiveIdea
   module Acts
     module NestedSet