Rails：沒有路線與[POST]嵌套資源匹配

Question

在routes.rb中，我有此嵌套資源

# OBSERVATIVE SESSIONS
resources :observative_sessions do
# OBSERVATIONS
  resources :observations
end

在observations_controller.rb中

 def new
   @observative_session = ObservativeSession.find(params[:observative_session_id])
   @observation = Observation.new
   @observation.observative_session_id = @observative_session.id
 end

def create
  @observative_session = ObservativeSession.find(params[:observative_session_id])
  @observation = @observative_session.observations.build(observation_params)
  @observation.user_id = current_user.id

   respond_to do |format|
    if @observation.save
     format.html { redirect_to [@observative_session, @observation], notice: 'Observation was successfully created.' }
     format.json { render :show, status: :created, location: @observation }
    else
     format.html { render :new }
     format.json { render json: @observation.errors, status: :unprocessable_entity }
    end
  end
end

在observations_controller_test.rb中，我設置了觀察和觀察性會話。 新作品的測試就很好。

class ObservationsControllerTest < ActionDispatch::IntegrationTest
include Devise::Test::IntegrationHelpers

setup do
  @observative_session = observative_sessions(:one)
  @observation = observations(:two)
  sign_in users(:admin_user)
end

test "should get new" do
  get new_observative_session_observation_path(@observative_session)
  assert_response :success
end

test "should create observation" do
  assert_difference('Observation.count') do
   post observative_session_observation_path(@observative_session, @observation), params: { observation: { start_time: @observation.start_time, description: @observation.description, rating: @observation.rating, notes: @observation.notes, celestial_body_name: @observation.celestial_body_name, telescope_name: @observation.telescope_name, binocular_name: @observation.binocular_name, eyepiece_name: @observation.eyepiece_name, filter_name: @observation.filter_name, user_id: @observation.user_id, observative_session_id: @observation.observative_session_id }}
 end

但這是我在創建測試中遇到的錯誤

 test_should_create_observation 
 ActionController::RoutingError: No route matches [POST] "/observative_sessions/980190962/observations/298486374"  

我不明白我在做什么錯。 謝謝你的幫助。

Answer 1

當您說POST observation_session_observation_path(@observation_session, @observation)您是在告訴它在參數中同時具有:observation_session_id和:id的URL，其中id是@obseravtion的id 。 但是，用於create操作的POST路徑不會采用最后一個id參數（表面上您正在使用該操作創建新記錄）。

嘗試從路徑助手中刪除@observation （並確保使用正確的創建路徑： observation_session_observations_path(@observation_session) 。您可以通過rake routes路由在終端或localhost:3000/rails/info/routes查看localhost:3000/rails/info/routes在瀏覽器中看到它。

我還在您的new操作中看到您正在手動分配observation_session_id 。 我建議您要么做以后做的事，然后調用@obervation_session.observations.build Observation.new(observation_session: @observation_session) ，要么調用Observation.new(observation_session: @observation_session) 。 您應該避免這樣設置id。