FactoryGirl.update實際上並沒有更新關聯對象

Question

我使用Rails 4.1.7，Rspec 3.0.4與FactoryGirl和postgresql ActiveRecord數據庫。

我想測試一個方法，找到一個關聯的模型，然後更新該模型中的列。這個測試很粗糙，但它使所有必要的協會（我檢查撬）。調用該方法時，期望值將繼續返回nil（因爲該列默認爲零，但應更新爲日期時間）。下面是代碼：

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 

圖片工廠

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 

錯誤：

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

您的@campaign變量在修改之前已經加載，所以您需要在檢查新值之前重新加載它。

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 

Answer 2

我會建議，加入該協會爲廣告活動中factory_girl圖片。我認爲問題在於，當您在活動記錄對象上使用<<時，實際上並未創建關聯。

我會嘗試在update_campaign方法中包括pry gem和binding.pry以查看模型是否正確創建。另外，我還會使用let語法來代替before do中的所有內容，只是可重用性。