Ruby on rails 3.2 accept_nested_attributes验证

问题描述：

我正在研究Rails 3.2应用程序上的ruby，我需要验证带有嵌套属性的窗体。在我的模型我有这个Ruby on rails 3.2 accept_nested_attributes验证

 
class Member 
    attr_accessible :email, :password.............etc 
    has_many :purchase_informations, :dependent => :destroy 
    accepts_nested_attributes_for :purchase_informations, :allow_destroy => true 
end 

class PurchaseInformation 
    belongs_to :member 
    attr_accessor :same_billing 
end

及以下表单数据：

{ members: 
    { purchase_informations_attributes: 
      { 0: 
       { information_type: "billing", 
       title: "Mr", 
       first_name: "", 
       last_name: "", 
       cuhk_no: "", 
       organization: "", 
       address: "", 
       zip_code: "", 
       country: "*", 
       telephone: "", 
       mobile: "", fax: "", 
       email: "asdasdasda", id: "27" 
       }, 
      1: 
       { information_type: "shipping", 
       title: "Mr", 
       first_name: "", 
       last_name: "", 
       cuhk_no: "", 
       organization: "", 
       address: "", 
       zip_code: "", 
       country: "*", 
       telephone: "", 
       mobile: "", 
       fax: "", 
       email: "", 
       id: "28" 
       } 
     } 
    } 
}

请帮我验证这个属性是空白。

谢谢！

答

你好你可以试试这个：

accepts_nested_attributes_for : purchase_informations, :reject_if => :all_blank

或在您的形式把一个：要求=>真正的功能

<%= f.input :name, :required => true %>

嗨艾伦。感谢您的洞察力，不幸的是上面的方法不是一个选项，因为我需要遍历每个值来检查是否有空值。只有所有值都是空白的，它才会起作用。对于输入字段中的必需属性，这用于html 5，并非所有浏览器都支持这一点。非常感谢你。 – Azrael1932 2013-04-24 11:15:02

尝试此操作：此操作验证特定列并验证是否存在嵌套属性的名称： accepting_attributes_for：purchase_informations，：reject_if => lambda {| a | a [：name] .blank？ } – 2013-04-25 03:58:29

Ruby on rails 3.2 accept_nested_attributes验证

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