我想为has_many / has_many关系定义一个工厂（我认为我做对了）但我不知道如何为这些创建工厂的每个对象定义属性。
这是主页，它是交易卡的列表
我们假设下面的主页视图是针对SIGNED-IN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，如果用户有特定交易（在表user_deals上，请参见下面的模型）a user_deal.number_of_clicks = 4然后，在卡上会出现一个按钮，其中显示“您达到了最大点击次数”的消息。如果点击次数<4，则不显示任何按钮。
所以我想在功能测试中使用工厂，我会检查如果我用fatcory girl创建一个对象@ userdeal1，用户达到4次点击，在这张卡上他看到按钮及其文本，但是他没有看到任何其他交易。
这是我到目前为止所拥有的
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
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
继工厂女性自述文件后，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
但是现在我不知道怎么说'确定这些在工厂中创建的user_deals之一，我想要一个有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
但测试不起作用，根据我尝试的小改动给我不同类型的错误。我很确定我无法真正创建2个对象user_deals，一个是number_of_clicks = 4而另一个是number_of_clicks = 1.
修改
发布错误请求后：
如果我离开@user_deal_with_max_of_clicks“：user =＆gt; @user，并且：deal =＆gt; @ deal1”，我会
NoMethodError:
undefined method `user=' for #<User:0x0000000b4754e0>
和
NoMethodError:
undefined method `deal=' for #<User:0x0000000b451568>
但我将它们删除如下：
@user_deal_with_max_of_clicks = FactoryGirl.build( :user_with_deals,
:number_of_clicks => 4
).save(validate: false)
然后我收到了这个错误：
NoMethodError:
undefined method `number_of_clicks=' for #<User:0x0000000b46ce80>
编辑2
utilities.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
答案 0 :(得分：2)
首先，我建议你使用let。写一个很棒的指南cleaner and better specs。
其次，建立良好的工厂至关重要。它们将极大地简化测试过程：
首先，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是有选择地调整工厂的好方法。因此，如果您希望您的用户成为superadmin，现在只需使用
create(:user, :superadmin)
想要超级拉特拉丁交易吗？容易。
create(:user, :superadmin, :with_deals)
你还没有发布你的交易工厂，但我相信你也可以适应这些技巧。
最后，导致user_deals。在您当前的工厂中，您没有找到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
现在对规范本身来说，通过学习的技巧，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