1 files changed, 7 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/attribute_methods/serialization.rb b/activerecord/lib/active_record/attribute_methods/serialization.rb
index 1287de0d0d..d484659190 100644
--- a/activerecord/lib/active_record/attribute_methods/serialization.rb
+++ b/activerecord/lib/active_record/attribute_methods/serialization.rb
@@ -24,6 +24,9 @@ module ActiveRecord
         # serialized object must be of that class on retrieval or
         # <tt>SerializationTypeMismatch</tt> will be raised.
         #
+        # A notable side effect of serialized attributes is that the model will
+        # be updated on every save, even if it is not dirty.
+        #
         # ==== Parameters
         #
         # * +attr_name+ - The field name that should be serialized.
@@ -66,6 +69,10 @@ module ActiveRecord
         def type
           @column.type
         end
+
+        def accessor
+          ActiveRecord::Store::IndifferentHashAccessor
+        end
       end
 
       class Attribute < Struct.new(:coder, :value, :state) # :nodoc: