FactoryGirl .update实际上不会更新关联的对象

Question

我正在使用带有FactoryGirl的Rails 4.1.7，Rspec 3.0.4和一个Postgresql ActiveRecord数据库。

我正在尝试测试一种找到关联模型的方法，然后更新该模型中的列。在这一点上，测试还很粗糙，但它使所有关联成为必要（我在撬动中检查）。调用该方法时，期望值将继续返回nil（默认情况下该列为nil，但应更新为日期时间）。下面是代码：

post_picture_spec.rb

require 'rails_helper'

RSpec.describe ModelName::PostPicture, :type => :model do

  describe 'update_campaign method' do

    context 'when the picture is tied to a campaign' do

      before do
        @campaign = FactoryGirl.create(:campaign)
        @campaign.media << @picture1 = FactoryGirl.create(:picture, posted: true, time_scheduled: Date.parse('2014-07-15 18:00:00'), time_posted: Date.parse('2014-07-15 18:00:00'))
        @campaign.media << @picture2 = FactoryGirl.create(:picture, posted: true, time_scheduled: Date.parse('2014-08-20 19:00:00'), time_posted: Date.parse('2014-08-20 19:00:00'))
      end

      it 'should update first item in campaign' do
        # pending("FactoryGirl update issue")
        ModelName::PostPicture.send(:update_campaign, @picture)
        expect(@campaign.time_started).to eq(@picture.time_posted)
      end

  end

end

图片工厂

FactoryGirl.define do
  factory :picture do
    time_approved { Date.parse('2014-08-22 17:00:00') }
    time_posted { Date.parse('2014-08-22 17:00:00') }
    time_scheduled { Date.parse('2014-08-22 17:00:00') }
    processed true
  end
end

post_picture.rb

class ModelName::PostPicture

  def self.call(id)
    [collapsed]
  end

private

      def self.update_campaign(picture)
        campaign = picture.campaign
        campaign_pictures = campaign.pictures.sort_by(&:time_scheduled)
            campaign.update(time_started: picture.time_posted) if campaign_pictures.first == picture
            campaign.update(time_completed: picture.time_posted) if campaign_pictures.last == picture
      end
end

错误：

 Failure/Error: expect(@campaign.time_started).to eq(@picture1.time_posted)

   expected: 2014-07-15 00:00:00.000000000 +0000
        got: nil

   (compared using ==)

Answer 1

@campaign在进行修改之前，您的变量已被加载，因此您需要在检查新值之前重新加载它。

it 'should update first item in campaign' do
  ModelName::PostPicture.send(:update_campaign, @picture)
  @campaign.reload
  expect(@campaign.time_started).to eq(@picture.time_posted)
end