1 files changed, 5 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/core.rb b/activerecord/lib/active_record/core.rb
index d39e5fddfe..47183752e7 100644
--- a/activerecord/lib/active_record/core.rb
+++ b/activerecord/lib/active_record/core.rb
@@ -108,6 +108,11 @@ module ActiveRecord
     end
 
     module ClassMethods
+      def allocate
+        define_attribute_methods
+        super
+      end
+
       def initialize_find_by_cache
         self.find_by_statement_cache = {}.extend(Mutex_m)
       end