New annotation, because of db switch to mysql.

Background: sqlite has some problems with decimal option.

app/models/order_comment.rb

@@ -1,14 +1,3 @@
-# == Schema Information
-#
-# Table name: order_comments
-#
-#  id         :integer         not null, primary key
-#  order_id   :integer
-#  user_id    :integer
-#  text       :text
-#  created_at :datetime
-#
-
 class OrderComment < ActiveRecord::Base
 
   belongs_to :order
@@ -16,3 +5,15 @@ class OrderComment < ActiveRecord::Base
 
   validates_presence_of :order_id, :user_id, :text
 end
+
+# == Schema Information
+#
+# Table name: order_comments
+#
+#  id         :integer(4)      not null, primary key
+#  order_id   :integer(4)
+#  user_id    :integer(4)
+#  text       :text
+#  created_at :datetime
+#
+