我如何測試has_many：通過關聯，還有一個validates_presence_of驗證與Rails中Factory Girl的關聯？

Question

我想通過與has_many關聯的has_many來驗證具有validates_presence_of的Factory Girl的模型。儘管表單工作正常，而且我可以編寫一個手動填寫表單的測試，但我無法獲得有效的工廠。這個測試持續失敗：

it "has a valid work factory" do 
    work = FactoryGirl.build(:work) 
    work.should be_valid 
end 

這裏的錯誤消息：

Work has a valid work factory 
    Failure/Error: work.should be_valid 
     expected #<Work id: nil, name: "Client Website", date: "2013-06-03 16:13:08", client: #<Client id: 1, name: "Client Number 4", client_code: "CN4", created_at: "2013-06-04 16:13:12", updated_at: "2013-06-04 16:13:12">, description: "A great new website for the client.", image: "/image.jpg", service: "Web", featured: true, created_at: nil, updated_at: nil> to be valid, but got errors: Client can't be blank 

這是我的factories.rb文件：

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

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

    factory :client do 
    sequence(:name)   { |n| "Client Number #{n}"} 
    sequence(:client_code) { |n| "CN#{n}"} 
    end 

    factory :work do 
    name   "Client Website" 
    client 
    date   1.day.ago 
    description  "A great new website for the client." 
    image   "/image.jpg" 
    service   "Web" 
    featured  true 
    end 
end 

我的工作模式：

class Work < ActiveRecord::Base 
    attr_accessible :client, :client_ids, :date, :description, :featured, :image, :name, :service 

    validates_presence_of :client_ids 
    validates_presence_of :date, :image, :name 
    validates_length_of :description, :in => 5..500, :allow_blank => true 
    validates_length_of :name, :in => 5..50 

    has_many :postings 
    has_many :clients, :through => :postings 
end 

我客戶端型號：

class Client < ActiveRecord::Base 
    attr_accessible :client_code, :name 

    validates_presence_of  :client_code, :name 
    validates_uniqueness_of :name 
    validates_length_of  :client_code, :is => 3 
    validates_length_of  :name, :in => 5..50 

    has_many :postings 
    has_many :works, :through => :postings 
end 

看起來這個測試應該通過，因爲工廠正在建立一個客戶端。但我不確定爲什麼驗證會導致錯誤。

Answer 1

錯誤消息說expected ..... to be valid, but got errors: Client can't be blank

work = FactoryGirl.build(:work) # this returns an unsaved object 

使用build沒有保存的對象。對象是nil。如果對象是nil it is blank

要保存的對象創建這樣

work = FactoryGirl.create(:work) # this returns a saved object 

現在

work.should be_valid 

應該通過

UPDATE：

我沒有仔細看看你的`factories.rb'

factory :work do 
    name   "Client Website" 
    client 
    date   1.day.ago 
    description  "A great new website for the client." 
    image   "/image.jpg" 
    service   "Web" 
    featured  true 
end 

您的client屬性在work工廠字面上是空白的。這不會通過驗證，並不會保存對象。在client填寫工廠或東西傳遞創造這樣

work = FactoryGirl.create(:work, client: "fill in with client")