为什么工厂女孩不排序独特的属性？

Question

我的控制器规范失败，因为 Factory Girl 似乎正在创建非唯一的用户，即使我对需要唯一的用户属性进行了排序。

错误

  1) TopicsController POST #create when topic is invalid should render new
     Failure/Error: let(:invalid_topic) {Factory.build :invalid_topic}
     ActiveRecord::RecordInvalid:Validation failed: Email has already been taken, Username has already been taken

  2) TopicsController POST #create when topic is valid should redirect to show
     Failure/Error: let(:valid_topic) {Factory.build :topic}
     ActiveRecord::RecordInvalid:
       Validation failed: Email has already been taken, Username has already been taken

控制器规格 (RSpec)

  describe "POST #create" do                          
    let(:valid_topic) {Factory.build :topic}
    let(:invalid_topic) {Factory.build :invalid_topic}

    context "when topic is invalid" do
      it "should render new" do
        post :create, :topic => invalid_topic
        response.should render_template(:new)
      end
    end
    context "when topic is valid" do
      it "should redirect to show" do
        post :create, :topic => valid_topic
        response.should redirect_to(topic_path(assigns(:topic)))
      end
    end
  end

工厂

Factory.define :user do |f|
  f.sequence(:username) { |n| "foo#{n}"}
  f.password "password"
  f.password_confirmation { |u| u.password}
  f.sequence(:email) { |n| "foo#{n}@example.com"}
end

Factory.define :topic do |f|
  f.name "test topic"
  f.association :creator, :factory => :user
  f.forum_id 1
end

为什么当我使用 时，Factory Girl 不排序用户属性Factory.create :主题?

Answer 1

rake db:test:prepare 似乎解决了这个问题。

但不知道为什么。架构没有改变。

Answer 2

请考虑使用 database_cleaner gem。其中一种是专门为了实现在测试运行之间清理数据库的目的而设计的。

这篇文章几乎解释了一切。

Answer 3

您应该考虑在测试结束时手动删除所有主题。当然，这不是第一解决方案，但对我来说效果非常好。

after(:all) { Topic.delete_all }