add modaction helper

app/models/ban.rb

@@ -100,6 +100,6 @@ class Ban < ActiveRecord::Base
   end
 
   def create_mod_action
-    ModAction.create(:description => %{Banned "#{user_name}":/users/#{user_id} until #{expires_at}})
+    ModAction.log(%{Banned "#{user_name}":/users/#{user_id} until #{expires_at}})
   end
 end