ruby-on-rails - Rspec "no route matches"

Question

我有一个奇怪的情况。
我的routes.rb中有这样的代码:

concern :votable do
  post :vote_up, on: :member, controller: :votes
  post :vote_down, on: :member, controller: :votes
end

resources :questions, concerns: [:commentable, :votable], shallow: true do
  resources :answers, concerns: [:commentable, :votable]
end

所以，它给了我 helper vote_up_question和 vote_up_answer通过“帖子”:

vote_up_answer POST   /answers/:id/vote_up(.:format)                 votes#vote_up
vote_down_answer POST   /answers/:id/vote_down(.:format)               votes#vote_down
vote_up_question POST   /questions/:id/vote_up(.:format)               votes#vote_up
vote_down_question POST   /questions/:id/vote_down(.:format)             votes#vote_down

我的投票 Controller :

  before_action :load_parent

  def vote_up
    current_user.vote_for(@parent)
    redirect_to :back, notice: "Voted up"
  end

  private

  def load_parent
    resource, id = request.path.split("/")[1, 2]
    @parent = resource.singularize.classify.constantize.find(id)
  end

一切都很完美，但是!
我想测试一下 load_parent使用 RSpec 的方法:

RSpec.describe VotesController, type: :controller do
  let(:question) {create(:question)}
  let(:answer) {create(:answer, user_id: user, question_id: question)}
  let(:user) {create(:user)}
  before(:each) do |example|
    sign_in user if example.metadata[:sign_in]
    request.env["HTTP_REFERER"] = question_path(question) if example.metadata[:redirect_back]
  end


  describe 'POST #vote_up', sign_in: true, redirect_back: true  do
    it 'should assign question to @parent' do
      post vote_up_question_path(question)
      expect(assigns(:parent)).to eq 'question'
    end
  end
end

这是一个问题:

ActionController::UrlGenerationError:
       No route matches {:action=>"/questions/1/vote_up", :controller=>"votes"}

怎么了？我也尝试了不同的方法来明确路线，比如 post :vote_up, question_id: question ，但它不起作用

Answer 1

尝试:

 let!(:question) {create(:question)}
 let!(:user) {create(:user)}
 let!(:answer) {create(:answer, user_id: user, question_id: question)}

let 是惰性求值的，所以如果它没有在这个块中被调用，它可能是未定义的。

然后做:

 describe 'POST #vote_up', sign_in: true, redirect_back: true  do
it 'should assign question to @parent' do
  post :vote_up, id: question.id
  expect(assigns(:parent)).to eq 'question'
end

结尾