ruby-on-rails - validates_associated 和 validates_presence_of 没有按预期与 rspec 一起工作？

Question

我有一个用户模型和一个友谊模型。

class Friendship < ActiveRecord::Base
  belongs_to :sender, :class_name=>'User', :foreign_key=>'sender_id'
  belongs_to :receiver, :class_name=>'User', :foreign_key=>'receiver_id'

  validates_presence_of :receiver_id, :sender_id
  validates_associated :receiver, :sender
end

class User < ActiveRecord::Base
  has_many :sent_friendships, :class_name => "Friendship", :foreign_key => "sender_id", :dependent => :destroy
  has_many :received_friendships, :class_name => "Friendship", :foreign_key => "receiver_id", :dependent => :destroy
end

我的 rspec 测试之一是

describe Friendship do

  before(:each) do
    @valid_attributes = {
      :sender_id => 1,
      :receiver_id => 2,
      :accepted_at => nil
    }
  end

  it "should not be valid with non-existant receiver_id" do
    f = Friendship.new(@valid_attributes)
    f.receiver_id = 99999
    f.should_not be_valid
  end
end

测试不应该是有效的，因为没有 user_id 9999 的用户。但是测试表明友谊模型是有效的。

为什么会这样？

编辑:

但我想像上面提到的那样进行测试 -> 而不是直接分配发件人。这不可能吧？？

Answer 1

如果您希望您的模型以这种方式工作，请更改:

validates_presence_of :receiver_id, :sender_id

为此:

validates_presence_of :receiver, :sender