我的问题是关于这个 AR 及其实例变量 @saved
class PhoneNumber < ActiveRecord::Base
has_one :user
validates_presence_of :number
def self.create_phone_number( user, phone_hash )
@new_phone = PhoneNumber.new(phone_hash)
@user = user
PhoneNumber.transaction do
@user.phone_numbers << @new_phone
@new_phone.save!
@user.save!
end
@saved = true
return @new_phone
rescue ActiveRecord::RecordInvalid => invalid
@saved = false
return @new_phone
end
def saved?
@saved ||= false
end
end
据我了解,实例变量将通过实例的存在保持其值。
在我的控制器中使用此 AR 时,保存了吗?总是返回假..
@phone_number = PhoneNumber.create_phone_number(@active_user, params[:phone_number])
puts "add_phone_number"
if @phone_number.saved? => always false
关于这些实例变量,我缺少什么?谢谢