Rails 3，未知驗證器：'EmailValidator'

Question

我嘗試在我的Rails應用程序中添加一個電子郵件驗證器。我創建以下文件/lib/validators/email_validator.rb

class EmailValidator < ActiveModel::EachValidator 
    def validate_each(object, attribute, value) 
    unless value =~ /^([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})$/i 
     object.errors[attribute] << (options[:message] || "is not formatted properly") 
    end 
    end 
end 

在application.rb中添加此行：

config.autoload_paths << "#{config.root}/lib/validators"

這裏是我的用戶模型：

class User < ActiveRecord::Base 
    attr_accessible :email, :password,:name 
    validates :email, :presence => true, :uniqueness => true, :email => true 
end 

，如果我想啓動服務器我得到一個錯誤：

Unknown validator: 'EmailValidator' (ArgumentError) 

有沒有人有一個想法，我可以如何解決這個問題？

Answer 1

If you place your custom validators in app/validators they will be automatically loaded without needing to alter your config/application.rb file.

資源：Where should Rails 3 custom validators be stored?（第二應答）

Answer 2

嘗試修改後的用戶模型;

class User < ActiveRecord::Base 

    attr_accessible :email, :password,:name 

    validates :email, :presence => true, :uniqueness => true 

end 

Answer 3

此錯誤occures，becouse軌道載荷模型文件的驗證文件之前

嘗試手動要求您的驗證文件在你的模型文件的開始

require_dependency 'validators/email_validator.rb'