Remember the stored attributes in a config attribute.

This allows you to retrieve the list of attributes you've defined.
Usable for e.g. selects in the view, or interators based on the
attributes you wish to store in the serialized column.

1 files changed, 12 insertions, 0 deletions

diff --git a/activerecord/lib/active_record/store.rb b/activerecord/lib/active_record/store.rb
index 542cb3187a..f5c7a9f034 100644
--- a/activerecord/lib/active_record/store.rb
+++ b/activerecord/lib/active_record/store.rb
@@ -1,3 +1,4 @@
+require 'active_support/concern'
 require 'active_support/core_ext/hash/indifferent_access'
 
 module ActiveRecord
@@ -33,9 +34,18 @@ module ActiveRecord
   #   class SuperUser < User
   #     store_accessor :settings, :privileges, :servants
   #   end
+  #
+  # The stored attribute names can be retrieved using +stored_attributes+.
+  #
+  #   User.stored_attributes[:settings] # [:color, :homepage]
   module Store
     extend ActiveSupport::Concern
 
+    included do
+      config_attribute :stored_attributes
+      self.stored_attributes = {}
+    end
+
     module ClassMethods
       def store(store_attribute, options = {})
         serialize store_attribute, IndifferentCoder.new(options[:coder])
@@ -55,6 +65,8 @@ module ActiveRecord
             send(store_attribute)[key]
           end
         end
+
+        self.stored_attributes[store_attribute] = keys.flatten
       end
     end