宝石文件
gem 'rails', '~> 4.2', '>= 4.2.5'
gem 'userstamp', :git => 'https://github.com/stricte/userstamp.git', :branch => 'rails4'
用户模型
class User < ActiveRecord::Base
...
model_stamper
stampable
...
end
我有这个消息
You tried to define an association named creator on the model User, but this will conflict with a method creator already defined by Active Record. Please choose a different association name. (ArgumentError)
我该如何解决?