Rails (RoR) ActiveRecord 自定义验证 [英] Rails (RoR) ActiveRecord custom validation

问题描述

我正在尝试使用自定义验证方法 validate_as_email 扩展 ActiveRecord，以便我可以像这样使用它:

I'm trying to extend ActiveRecord with the custom validation method validate_as_email so i could use it like this:

class User < ActiveRecord::Base
  validates_as_email :email
end

我在这里找到了关于如何扩展 ActiveRecord::Base 类的描述:http://guides.rubyonrails.org/activerecord_validations_callbacks.html它说你必须在 config/initializers/{myfile}.rb 下创建一个 *.rb 类.

I found description on how to extend ActiveRecord::Base class here: http://guides.rubyonrails.org/activerecord_validations_callbacks.html It says you have to create a *.rb class under config/initializers/{myfile}.rb.

ActiveRecord::Base.class_eval do  
   def self.validates_as_email(attr_name)  
      validate is_email_fn(attr_name)
   end
end 

接下来我必须做什么才能在我的模型中使用 validates_as_email 以及我应该在哪里放置 is_email_fn() 函数.

What do I have to do next so I could use validates_as_email in my model and where should I put is_email_fn() function.

推荐答案

希望对你有所帮助 http://marklunds.com/articles/one/312

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