Rails：如何区分保持属性不变与显式将新值设置为与旧值相同？

Question

ActiveRecord User 有 email 和 email_verified。如果电子邮件发生变化，它将 email_verified 设置为 false 使用：

before_save :process_new_email, if: :email_changed?

process_new_email 基本上就是：

def process_new_email
   self.email_verified = false
end

但是，对于 user.update(email: email, email_verified: true)，如果 email_verified 之前是 true，这也会将 email_verified 设置为 false。

即这失败了：

      user = create(:user, email: 'test@example.com', email_verified: true)
      user.update!(email: 'other@example.com', email_verified: true)
      expect(user.email_verified).to eq(true)

这就过去了：

      user = create(:user, email: 'test@example.com', email_verified: true)
      user.update!(email: 'other@example.com')
      expect(user.email_verified).to eq(false)

如何让两个测试用例都通过？

Answer 1

我认为您可以使用 ActiveRecord 为您创建的 email_verified_came_from_user? 方法（它为每个属性创建该方法）。

例如检查这个：

user = User.find_by(email: 'test@example.com')
user.email_came_from_user? # => false
user.email = 'test@example.com' # setting the same so no change
user.email_came_from_user? # => true

所以，我会做类似的事情：

def process_new_email
  self.email_verified = false unless email_verified_came_from_user?
end

Answer 2

如果已更改，请尝试还原 email_verified。

before_save :revert_email_verified, if: :email_verified_changed?
before_save :process_new_email, if: :email_changed?

def revert_email_verified
  self.email_verified = email_verified_was
end

Rails：如何区分保持属性不变与显式将新值设置为与旧值相同？

Rails: how to tell the difference between leaving an attribute unchanged vs explicitly setting the new value to be the same as the old value?

ruby

rspec

ruby-on-rails