Rails嵌套控制器-錯誤：沒有路線匹配

Question

Rails 5.2.1 RSpec 3.8

我正在嘗試使用嵌套控制器構建REST API。 我收到一個錯誤：

No route matches {:action=>"index", :controller=>"playlists/playlist_items", :format=>:json, :playlist=>60}

這是我的routes.rb：

Rails.application.routes.draw do
  # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
  resources :playlists do
    resources :playlist_items, controller: 'playlists/playlist_items'
  end
  resources :playlist_items
  resources :artists
  resources :tracks
end

這是rake routes的輸出：

                   Prefix Verb   URI Pattern                                                                              Controller#Action
  playlist_playlist_items GET    /playlists/:playlist_id/playlist_items(.:format)                                         playlists/playlist_items#index
                          POST   /playlists/:playlist_id/playlist_items(.:format)                                         playlists/playlist_items#create
   playlist_playlist_item GET    /playlists/:playlist_id/playlist_items/:id(.:format)                                     playlists/playlist_items#show
                          PATCH  /playlists/:playlist_id/playlist_items/:id(.:format)                                     playlists/playlist_items#update
                          PUT    /playlists/:playlist_id/playlist_items/:id(.:format)                                     playlists/playlist_items#update
                          DELETE /playlists/:playlist_id/playlist_items/:id(.:format)                                     playlists/playlist_items#destroy
... etc ...

這是測試失敗的地方：

describe Playlists::PlaylistItemsController do
  describe "GET #index" do
    before do
      @playlist =  create :playlist, { date: '2000-01-01' } 
      get :index, params: { playlist: @playlist.id, format: :json }
    end
    it "returns http success" do
      expect(response).to have_http_status(:success)
    end
  end
end

該錯誤抱怨沒有路線匹配

{:action=>"index", :controller=>"playlists/playlist_items", :format=>:json, :playlist=>60}

但據我所知，這條與rake routes完全一致的rake routes是：

  playlist_playlist_items GET    /playlists/:playlist_id/playlist_items(.:format)                                         playlists/playlist_items#index

我想念什么？

Answer 1

該參數稱為playlist_id而不是playlist 。

describe Playlists::PlaylistItemsController do
  describe "GET #index" do
    before do
      @playlist =  create :playlist, { date: '2000-01-01' } 
      get :index, params: { playlist_id: @playlist.id, format: :json }
    end
    it "returns http success" do
      expect(response).to have_http_status(:success)
    end
  end
end

請注意，控制器應返回401 CREATED響應。

您還可以通過添加module選項將資源嵌套在module ：

resources :playlists do
  resources :playlist_items, module: :playlists
end