Question

我想在我实际发送电子邮件时验证email对象，而不是每次我更新时都验证：

class Email < ActiveRecord::Base
  # Runs on every update/save method
  validates :body, presence: true

  def send_email
    # Only run when this method is called
    if body.blank?
      errors.add :body, "can't be blank"
      raise ActiveRecord::InvalidRecord.new(self)
    end

    update_column(:sent_at, Time.zone.now)
    EmailMailer.new_email(self).deliver
  end
end

目前，此代码将在每次更新时验证body，但我只想验证调用send_email方法的时间。原因是我希望允许用户在不实际发送的情况下保存电子邮件，并且此验证会强制他们拥有值。

我可以在我的方法中手动检查验证，但是想知道是否有一个＆＃34;清洁剂＆＃34;接近这个，比如：

validates :body, presence: true, action: :send_email # does not work, but what I want

更新2015-08-13 15:30

我有一些半工作代码，但更喜欢比我更清晰的解决方案：

class Email < ActiveRecord::Base
  # remove validate methods

  def send_email
    errors.add :body, "can't be blank" if body.blank?

    # My application has some higher level controller code that handles exceptions.
    raise ActiveRecord::InvalidRecord.new(self) if errors.any?

    # code execution should be stopped by exception...
  end
end

Rails 4：仅针对特定操作验证模型

0 个答案: