Rails 4:after_update回调导致无限循环

Question

我在User模型中使用了after_update回调.

型号User.rb

after_update :check_phone

check_phone
  phone_validation if phone_changed?
end

def phone_validation
  code = Array.new(8){rand(36).to_s(36)}.join
  self.phone_verification_code = code
  self.save
end

然而,这导致无限循环.问题是self.save在phone_validation方法之后再次调用回调.phone_changed?显然仍然回归true.我该如何改变这种行为？

Answer 1

试试这个:

User.rb

attr_accessor  :phone_checked

after_update :check_phone, :unless => "phone_checked"

check_phone
  phone_validation if phone_changed?
end

def phone_validation
  code = Array.new(8){rand(36).to_s(36)}.join
  self.phone_verification_code = code
  self.phone_checked = true  # update flag
  self.save
end

要么

谨慎使用: 跳过回调

def phone_validation
 code = Array.new(8){rand(36).to_s(36)}.join
 self.update_column(:phone_verification_code => code)
end