Rails 嵌套资源在参数哈希中返回不正确的 ID

Question

我正在尝试制作一个简单的应用程序来提交用户的目标，然后用户可以将目标标记为已完成。我可以很好地完成“新”操作，但是当我尝试“编辑”时，参数包含用户 ID 而不是目标 ID。

对于我的部分表单，我使用了一个简单的 form_with:

> <%= form_with(model: [@user, @goal]) do |f| %>
>     <%= f.label :goal_title, "Title" %>
>     <%= f.text_field :goal_title %>
>     <%= f.label :description, "Description" %>
>     <%= f.text_area :description %>
>     <%= f.select(:public, [['Public', true], ['Private', false]]) %>
>     <%= f.select(:completed, [['Completed', true], ['Not Completed', false]]) %>
>     <%= f.submit "Submit" %> 
>     <% end %>

我的控制器如下：

class GoalsController < ApplicationController
    def index
        @goals = current_user.goals
        render :index
    end

    def new
        @goal = Goal.new(user_id: current_user.id)
        @user = current_user
        render :new
    end

    def create
        @goal = current_user.goals.new(goal_params)
        if @goal.save
            redirect_to user_goals_path
            flash[:notice] = "Goal saved"
        else
            flash.now[:errors] = @goal.errors.full_messages
            render :new
        end
    end

    def update
        @goal = Goal.find_by(id: params[:id])
        if @goal.update_attributes(goal_params)
            redirect_to user_goals_path
            flash[:notice] = "Goal updated"
        else
            flash.now[:errors] = @goal.errors.full_messages
            render :edit
        end
    end

    def edit
        @goal = Goal.find_by(id: params[:id])
        @user = current_user
        render :edit
    end

    def homepage
        @goals = Goal.all
        render :index
    end

    private

    def goal_params
       params.require(:goal).permit(:goal_title, :description, :completed, :public)
    end 
end

我目前的路线是：

                       Prefix Verb   URI Pattern                                                                              Controller#Action
             new_user_session GET    /users/sign_in(.:format)                                                                 devise/sessions#new
                 user_session POST   /users/sign_in(.:format)                                                                 devise/sessions#create
         destroy_user_session DELETE /users/sign_out(.:format)                                                                devise/sessions#destroy
            new_user_password GET    /users/password/new(.:format)                                                            devise/passwords#new
           edit_user_password GET    /users/password/edit(.:format)                                                           devise/passwords#edit
                user_password PATCH  /users/password(.:format)                                                                devise/passwords#update
                              PUT    /users/password(.:format)                                                                devise/passwords#update
                              POST   /users/password(.:format)                                                                devise/passwords#create
     cancel_user_registration GET    /users/cancel(.:format)                                                                  devise/registrations#cancel
        new_user_registration GET    /users/sign_up(.:format)                                                                 devise/registrations#new
       edit_user_registration GET    /users/edit(.:format)                                                                    devise/registrations#edit
            user_registration PATCH  /users(.:format)                                                                         devise/registrations#update
                              PUT    /users(.:format)                                                                         devise/registrations#update
                              DELETE /users(.:format)                                                                         devise/registrations#destroy
                              POST   /users(.:format)                                                                         devise/registrations#create
                   user_goals GET    /user/goals(.:format)                                                                    goals#index
                              POST   /user/goals(.:format)                                                                    goals#create
                new_user_goal GET    /user/goals/new(.:format)                                                                goals#new
               edit_user_goal GET    /user/goals/:id/edit(.:format)                                                           goals#edit
                    user_goal PATCH  /user/goals/:id(.:format)                                                                goals#update
                              PUT    /user/goals/:id(.:format)                                                                goals#update
                              DELETE /user/goals/:id(.:format)                                                                goals#destroy
                     new_user GET    /user/new(.:format)                                                                      users#new
                    edit_user GET    /user/edit(.:format)                                                                     users#edit
                         user GET    /user(.:format)                                                                          users#show
                              PATCH  /user(.:format)                                                                          users#update
                              PUT    /user(.:format)                                                                          users#update
                              DELETE /user(.:format)                                                                          users#destroy
                              POST   /user(.:format)                                                                          users#create
                        goals GET    /goals(.:format)                                                                         goals#homepage
                         root GET    /                                                                                        goals#homepage

“编辑”中的参数散列显示正常：<ActionController::Parameters {"controller"=>"goals", "action"=>"edit", "id"=>"197"} permitted: false> 但“更新”的参数显示 <ActionController::Parameters {"_method"=>"patch", "goal"=>{"goal_title"=>"Updated goal", "description"=>"Updated description", "public"=>"true", "completed"=>"true"}, "commit"=>"Submit", "controller"=>"goals", "action"=>"update", "id"=>"379"} permitted: false>。 ID 应该是 197（目标 ID）而不是 379（用户 ID）。

有什么建议吗？谢谢。

Answer 1

如果你再看看你的路线：

                   user_goals GET    /user/goals(.:format)                                                                    goals#index
                              POST   /user/goals(.:format)                                                                    goals#create
                new_user_goal GET    /user/goals/new(.:format)                                                                goals#new
               edit_user_goal GET    /user/goals/:id/edit(.:format)                                                           goals#edit
                    user_goal PATCH  /user/goals/:id(.:format)                                                                goals#update
                              PUT    /user/goals/:id(.:format)                                                                goals#update
                              DELETE /user/goals/:id(.:format)

目标没有嵌套在用户资源中，而是用户在这里充当命名空间，因此当您调用 form_with(model: [@user, @goal]) 时，Rails 将选择 user.id 作为 id 参数。

解决方案：

如果您希望它成为嵌套资源，您需要将 config/routes.rb 中的路由配置更改为类似这样的内容。
```
resources :users do
  resources :goals
end
```
如果不需要嵌套资源，只需将form_with(model: [@user, @goal])改为form_with(model: @goal)

Rails 嵌套资源在参数哈希中返回不正确的 ID

Rails nested resource returning incorrect ID in params hash

ruby

controller

nested

ruby-on-rails

devise