有效为假但错误为空答案

【问题标题】：Valid is false but errors empty有效为假但错误为空
【发布时间】：2014-03-13 09:08:11
【问题描述】：

当我检查对象是否有效<%= current_user.contact.valid? %> 它返回false。但是<%= current_user.contact.errors.count %> 返回0。我发现 solution 对某些人有用，但我不确定它是否适合我。

Contact 的验证

validates :RPNumber, :RPSerial, :RPNumber, :RPWho, :RPWhen, :RPDivisionCode,
            :Name, :RPDateBorn, :RPWhereBorn, :RPAddress, :RPFamilyStatus, :RPChild,
            :ZPNumber, :ZPWhereBorn, :ZPWhen, :ZPWhenEnd, :ZPWho, :GenderID, :ZPFIO, presence: true

  validates_format_of :ZPFIO, with: /^[a-zA-Z\s\-]*$/, message: 'ZPFIO'
  validates_format_of :Phone, with: /7\(\d+\)\d+/, message: 'Phone'
  validates_format_of :PhoneCode, with: /\d+/, message: 'PhoneCode'
  validates_format_of :PhoneNumber, with: /\d+/, message: 'PhoneNumber'
  validates_format_of :Web, with: /^(http|https)\:\/\/([a-z0-9][a-z0-9_-]*(?:.[a-z0-9][a-z0-9_-]*)+):?(d+)?\/?$/i, allow_blank: true, message: 'Web'
  validates_format_of :Mail, with: /^([0-9a-z]*([-|_]?[0-9a-z]+)*)(([-|_]?)\.([-|_]?)[0-9a-z]*([-|_]?[0-9a-z]+)+)*([-|_]?)@([0-9a-z]+([-]?[0-9a-z]+)*)(([-]?)\.([-]?)[0-9a-z]*([-]?[0-9a-z]+)+)*\.[a-z]{2,4}$/i, message: 'Mail'

【问题讨论】：

你应该发布Contact模型的代码（或者如果它是一个大类，至少是与验证相关的代码）......
@Baldrick 添加了验证

标签： ruby-on-rails

【解决方案1】：

每次您执行current_user.contact 时，您都会创建一个新的联系人对象。所以，你正在做的是：

#make a new contact object and run validations on it
current_user.contact.valid?

#make a new contact object, which hasn't had validation run on it, then see if it has errors
current_user.contact.errors.count

试试这个：

contact = current_user.contact
contact.valid?
contact.errors.count

【讨论】：