ruby on rails教程第8章测试错误

Question

我在 Michael Hartl 的 Ruby on Rails 教程的第 8.2.1 章中遇到了两个不同的测试错误。我是 Rails 的新手，但我对语法错误和我能找到的任何其他内容进行了三次检查。非常感谢任何帮助。

错误信息 1： 错误[“test_should_get_new”，Minitest::Result，0.9693643249993329] test_should_get_new#Minitest::Result (0.97s) NameError: NameError: undefined local variable or method users_new_url' for #<UsersControllerTest:0x00000006e953f8> test/controllers/users_controller_test.rb:5:inblock in '

错误信息 2： 错误[“test_invalid_signup_information”，Minitest::Result，0.8977870759990765] test_invalid_signup_information#Minitest::Result (0.90s) ActionController::RoutingError: ActionController::RoutingError: 没有路由匹配 [POST] "/signup" test/integration/users_signup_test.rb:8:in block (2 levels) in <class:UsersSignupTest>' test/integration/users_signup_test.rb:7:inblock in '

Routes.rb

    Rails.application.routes.draw do

  root   'static_pages#home'
  get    '/help',    to: 'static_pages#help'
  get    '/about',   to: 'static_pages#about'
  get    '/contact', to: 'static_pages#contact'
  get    '/signup',  to: 'users#new'
  get    '/login',   to: 'sessions#new'
  post   '/login',   to: 'sessions#create'
  delete '/logout',  to: 'sessions#destroy'
  resources :users

end

会话控制器：

    class SessionsController < ApplicationController

  def new
  end

  def create
    user = User.find_by(email: params[:session][:email].downcase)
    if user && user.authenticate(params[:session][:password])
      # Log the user in and redirect to the user's show page.
    else
      flash.now[:danger] = 'Invalid email/password combination'
      render 'new'
    end
  end

  def destroy
  end
end

用户控制器：

    class UsersController < ApplicationController
  def show
    @user = User.find(params[:id])
  end

  def new
    @user = User.new
  end
  def create
    @user = User.new(user_params)
    if @user.save
      flash[:success] = "Welcome to your new profile!"
      redirect_to @user
    else
      render 'new'
    end
  end

  private

    def user_params
      params.require(:user).permit(:name, :email, :password,
                                   :password_confirmation)
    end

end

用户控制器测试

    require 'test_helper'

class UsersControllerTest < ActionDispatch::IntegrationTest
  test "should get new" do
    get users_new_url
    assert_response :success
  end

end

用户注册测试

    require 'test_helper'

class UsersSignupTest < ActionDispatch::IntegrationTest

  test "invalid signup information" do
    get signup_path
    assert_no_difference 'User.count' do
      post users_path, params: { user: { name:  "",
                                         email: "user@invalid",
                                         password:              "foo",
                                         password_confirmation: "bar" } }
    end
    assert_template 'users/new'

  assert_select 'div#error_explanation'
  assert_select 'div.field_with_errors'
  assert_select 'form[action="/signup"]'
  end

  test "valid signup information" do
    get signup_path
    assert_difference 'User.count', 1 do
      post users_path, params: { user: { name: "Example User",
                                        email: "user@example.com", 
                                        password:             "password",
                                        password_confirmation: "password" } }
    end
    follow_redirect!
    assert_template 'users/show'
    assert_not flash.nil?
  end

end

Answer 1

在您的users_controller_test 中，代码不知道users_new_url 是什么。这可能是因为该路线不存在。您很可能必须执行get new_user_path 之类的操作，但您可以通过输入rake routes 并获取可用路线列表来查找。

这是rake routes 将输出的示例：

users     GET     /users(.:format)                    users#index
          POST    /users(.:format)                    users#create
new_user  GET     /users/new(.:format)                users#new
edit_user GET     /users/:id/edit(.:format)           users#edit
user      GET     /users/:id(.:format)                users#show

您可以通过将_path 附加到名称来引用命名路径。即users_path 将映射到"users#index"controller 和方法。

rake routes 也有助于解决您的第二个问题，即您没有为 POST /signup 定义路由——您有一个 GET /signup。

因此，您需要添加如下一行：

post '/signup', to: 'users#create'

这条路线将映射到您的UsersController 的#create 方法，我看到您的代码中有该方法。