使用嵌套路线无法找到没有 ID 错误的锻炼

Question

我有一组嵌套路由，如下所示：

  resources :workouts do
    resources :exercises do
      resources :reports, shallow: true
    end
  end

我试图让它们尽可能浅，但不嵌套它们只会产生太多错误。

现在他们工作正常，除非我尝试访问 exercises#index 页面进行特定锻炼。我正在 link 页面是这样的：

<%= link_to 'Add/Edit Exercises', workout_exercises_path(@workout, exercise), method: :index %>

当我点击 link 我得到：

ActiveRecord::RecordNotFound at /workouts/3/exercises
Couldn't find Workout without an ID

我的 exercises_controller 在指示的行上调用错误：

class ExercisesController < ApplicationController
  before_action :authenticate_user!

  def index
      @workout = Workout.friendly.find(params[:id]) <<<<<THIS LINE
      @exercise = Exercise.new
      @exercises = Exercise.all
  end

  def new
    @exercise = Exercise.new
  end

  def create
    @workout = Workout.friendly.find(params[:id])
    exercise = @workout.exercises.new(exercise_params)
    exercise.user = current_user

    if exercise.save
      flash[:notice] = "Results saved successfully."
      redirect_to [@workout]
    else
      flash[:alert] = "Results failed to save."
      redirect_to [@workout]
    end
  end

  def destroy
    @workout = Workout.friendly.find(params[:workout_id])
    exercise = @workout.exercises.find(params[:id])

    if exercise.destroy
      flash[:notice] = "Exercise was deleted successfully."
      redirect_to [@workout]
    else
      flash[:alert] = "Exercise couldn't be deleted. Try again."
      redirect_to [@workout]
    end
  end

  private

  def exercise_params
      params.require(:exercise).permit(:name, :needs_seconds, :needs_weight, :needs_reps, :workout_id)
  end

  def authorize_user
    exercise = Exercise.find(params[:id])
    unless current_user == current_user.admin?
      flash[:alert] = "You do not have permission to create or delete an exercise."
      redirect_to [exercise.workout]
    end
  end
end

friendly.find 是因为我正在使用 friendly_id gem，它在 url 中生成 slug 而不是 id。我在其他工作模型中以相同的方式使用它，所以我不认为这是导致当前问题的原因。

谁能看出我为什么会收到此错误？我在我的错误的实时 shell 中输入了 @workout，它说 @workout 是 nil，这意味着它没有以某种方式获取值。我知道这是重要信息，但不知道如何修复它。

Answer 1

问题是：

您的路线是 /workouts/3/exercises，因此格式如下：/workouts/:workout_id/exercises

所以稍微修改一下您的create方法：

def create
  @workout = Workout.friendly.find(params[:workout_id])
  exercise = @workout.exercises.build(exercise_params)
  ...
end

Answer 2

  def index
      @workout = Workout.friendly.find(params[:workout_id])
      @exercise = Exercise.new
      @exercises = Exercise.all
  end

试试这个，希望对你有帮助。

使用嵌套路线无法找到没有 ID 错误的锻炼

Couldn't find Workout without an ID Error With Nested Routes

ruby-on-rails

nested-routes