ruby-on-rails - Rails 4/Factory Girl - has_many/has_many 工厂和定义不同的对象

Question

我想为 has_many/has_many 关系定义一个工厂(我想我做对了)但是我不知道如何为这些创建的工厂的每个对象定义属性。

这是主页，这是交易卡片的列表

我们假设下面的主页 View 是针对登录用户的(注意 current_user 来自 Devise)。

<% @deals.each do |deal| %>
  @userdeal = UserDeal.where('user_id = ? AND deal_id = ?', current_user.id, deal.id).take

    <div>
      <div class="button">
        <% if @userdeal.number_of_clicks = 4 %>you reached the maximum clicks
        <% end %>
      </div>
    </div>
  <% end %>

基本上，如果用户有一个特定的交易(在表 user_deals 上，见下面的模型)a user_deal.number_of_clicks = 4 然后，在卡片上会出现一个按钮，并显示一条消息，如“您达到了最大点击次数”。如果点击次数 <4，则不会出现任何按钮。

所以我想在功能测试中使用工厂，我将检查如果我用 fatcory girl 创建一个对象 @userdeal1，用户点击了 4 次，他会在这张卡片上看到按钮及其文本，但是对于他看不到其他交易。

这是我目前所拥有的

模型

class Deal < ActiveRecord::Base
  has_many   :user_deals,           dependent:  :destroy
  has_many   :users,                through:    :user_deals
end

class User < ActiveRecord::Base
  has_many :user_deals          
  has_many :deals,                through: :user_deals
end

class UserDeal < ActiveRecord::Base
  belongs_to :user,         :foreign_key => 'user_id'
  belongs_to :deal,         :foreign_key => 'deal_id'
end

以及表user_deal的结构

# Table name: user_deals
#
#  id                 :integer          not null, primary key
#  user_id            :integer
#  deal_id            :integer
#  number_of_clicks   :integer          default(0)
#  created_at         :datetime
#  updated_at         :datetime

到目前为止我找到了如何创建

FactoryGirl.define do
  factory :user_deal do
    association :user
    association :deal  

end

根据 factorygirl 自述文件，我创建了这个:

FactoryGirl.define do
  factory :user do

    sequence(:email) { |n| "person#{n}@example.com"}   
    password "vddfdf"
    password_confirmation "vddfdf"
      confirmed_at Time.now
      confirmation_token nil

    factory :superadmin do
      after(:create) {|user| user.add_role(:superadmin)}
    end

    after(:create) do |user|
      user.deals << FactoryGirl.create(:deal)
    end

    factory :user_with_deals do
      # used for defining user_deals
      transient do
        deals_count 5 
      end
      after(:create) do |user, evaluator|
        create_list(:deal, evaluator.deals_count, user: user)
      end
    end

  end
end

但现在我不知道如何说“在工厂中创建的这些 user_deals 之一是好的，我希望一个有 number_of_clicks =4，另一个有 number_of_clicks=1)。所以我试着把它直接放在测试中，如下所示:

describe 'HP deal card features', :type => :feature do

    context "As signed-in USER" do
    let(:subject) { ApplicationController.new }

    before do       
      @user = FactoryGirl.create(:user, :user_country_name => 'Germany') 
      @deal1   = FactoryGirl.build( :deal)
      @deal2  = FactoryGirl.build( :deal)
      @user_deal_with_max_of_clicks = FactoryGirl.build( :user_with_deals,
                                                            :user             => @user,
                                                            :deal             => @deal1,
:number_of_clicks => 4
                                                        ).save(validate: false)
      @user_deal_with_clicks_available = FactoryGirl.build( :user_with_deals,
                                                            :user             => @user,
                                                            :deal             => @deal2,
number_of_clicks => 1 # still has clicks
                                                        ).save(validate: false)
    it "the right behavior for the buttons telling him how many clicks he has left" do

      sign_in @user
      visit root_path
      # I'll find a way to test here if there is the text "you reached the maximum clicks" for the first card and not for the second   
    end
    after do
      visit destroy_user_session_path
    end

  end

但是测试不起作用，并且根据我尝试的小改动给出不同类型的错误。我很确定我没有设法真正创建 2 个对象 user_deals ，一个 number_of_clicks= 4，另一个 number_of_clicks= 1。

编辑

请求发布错误后:

如果我离开@user_deal_with_max_of_clicks ":user=> @user, and :deal => @deal1", 我得到

NoMethodError:
       undefined method `user=' for #<User:0x0000000b4754e0>

和

NoMethodError:
       undefined method `deal=' for #<User:0x0000000b451568>

但我删除它们如下:

@user_deal_with_max_of_clicks = FactoryGirl.build( :user_with_deals,                                                               
    :number_of_clicks => 4
                                                        ).save(validate: false)

然后我得到这个错误:

NoMethodError:
       undefined method `number_of_clicks=' for #<User:0x0000000b46ce80>

编辑 2

实用工具.rb

include ApplicationHelper

def sign_in(user)
    visit new_user_session_path
    fill_in     I18n.t("formtastic.labels.user.email"),         with: user.email
    fill_in     I18n.t("formtastic.labels.user.password"),      with: user.password
    click_on    I18n.t("devise.sessions.login_page.login")  
end

Answer 1

首先，我建议您使用let。有一个很棒的指南写cleaner and better specs .

其次，办好工厂很重要。它们将极大地简化测试过程:

所以开始时，您的用户工厂可以重组为

FactoryGirl.define do
  factory :user do
    sequence(:email) { |n| "person#{n}@example.com" }

    password "vddfdf"
    password_confirmation "vddfdf"

    confirmed_at Time.now
    confirmation_token nil

    trait :superadmin do
      role :superadmin
    end

    trait :with_deals do 
      after(:create) do |user|
        create_list(:deal, 5, user: user)
      end
    end
  end
end

Traits是选择性调整工厂的好方法。因此，如果您希望您的用户成为 super 管理员，现在只需使用

create(:user, :superadmin)

想要一个处理交易的 super 管理员？很简单。

create(:user, :superadmin, :with_deals)

您还没有发布您的交易工厂，但我相信您也可以将这些技巧应用到它们身上。

最后，通向 user_deals。在您当前的工厂中，您没有解决您的 number_of_clicks 列。

同样，您可以使用特征轻松设置它:

FactoryGirl.define do
  factory :user_deal do
    association :user
    association :deal

    trait :few_clicks do
      number_of_clicks 1
    end

    trait :many_clicks do
      number_of_clicks 4
    end
  end
end

现在回到规范本身，通过学到的技巧，建立你想要的关系是一件容易的事:

describe 'HP deal card features', :type => :feature do
  context "As signed-in USER" do
    let(:subject) { ApplicationController.new }
    let(:user) { create(:user, user_country_name: 'Germany')  }
    let(:deal1) { create(:deal) }
    let(:deal2) { create(:deal) }

    before do
      create(:user_deal, :few_clicks, user: user, deal: deal1)
      create(:user_deal, :many_clicks, user: user, deal: deal2)
    end

    it "tells the user how many clicks he has left" do
      sign_in user
      visit root_path
      # I'll find a way to test here if there is the text "you reached the maximum clicks" for the first card and not for the second
    end

    after do
      visit destroy_user_session_path
    end
  end
end