没有路线匹配 {:action=>"show", :controller=>"scoo.....缺少必需的键：[:id]

Question

我有一个用于创建和更新的部分表单...对于新的它呈现部分但在进行编辑时我不断收到此错误

ActionController::UrlGenerationError in Scoopes#edit
no route matches {:action=>"show", :controller=>"scoopes", :id=>nil, :user_name=>#<Scoope id: 11, name: "asdsada", user_id: 3, created_at: "2016-08-07 20:37:52", updated_at: "2016-08-07 20:37:52">} missing required keys: [:id]

我从旧问题中寻找答案，但没有人解决我的问题...该表格用于创建独家新闻...

scoope 和用户之间的关联是：

scoope belong_to user
and user has_many scoopes

这是我的勺子控制器：

class ScoopesController < ApplicationController
  before_action :authenticate_user!, except: [:show]
  before_action :set_scoope, only: [:show, :edit, :update, :destroy, :index]
  before_action :owned_scoope, only: [:edit, :update, :destroy]

  def index
    @scoopes = @user.scoopes.all
  end

  def show
    @scoope = @user.scoopes.find(params[:id])
  end

  def new
    @scoope = current_user.scoopes.build
  end

  def create
    @scoope = current_user.scoopes.build(scoope_params)
    if @scoope.save
        redirect_to scoope_path(current_user.user_name, @scoope)
    else
        render 'new'
    end
  end

  def edit
    @scoope = @user.scoopes.find(params[:id])
  end

  def update
    @scoope = @user.scoopes.find(params[:id])
    if @scoope.update(scoope_params)
        redirect_to scoope_path(@user, @scoope)
    else
        render 'edit'
    end
  end


  def destroy
    @scoope = @user.scoopes.find(params[:id])
    @scoope.destroy
    redirect_to scoopes_path
  end

  private

  def scoope_params
    params.require(:scoope).permit(:name)
  end

  def set_scoope
    @user = User.find_by(user_name: params[:user_name])
  end
  def owned_scoope
    unless @user == current_user
        flash[:danger] = "this scope dont belong to you"
        redirect_to root_path
    end
  end
end

这是我的部分表单（我认为问题可能与编辑路径有关，因为当我尝试用 edit_scoope_path 替换 scoope 时，它​​会在编辑页面下呈现表单......但它不会解决我的鲸鱼问题，因为它是部分）：

<div class="row">
  <div class="col-md-5 formm">
    <%= render 'shared/errors', obj: @scoope %>
    <div class="well">
      <%= form_for @scoope do |f| %>
        <div class="form-group">
          <%= f.label :name %><br/>
          <%= f.text_area :name, rows: 6, class: 'form-control' %>
        </div>
        <div class="form-group">
          <%= f.submit class: 'btn btn-primary'  %> <%= link_to "Back", :back, class: "btn btn-danger" unless current_page?(scoopes_path) %>
        </div>
      <% end %>
    </div>
  </div>
</div>

这是我的scoopes路线：

               scoopes GET    /:user_name/scoopes(.:format)               scoopes#index
                     POST   /:user_name/scoopes(.:format)               scoopes#create
          new_scoope GET    /:user_name/scoopes/new(.:format)           scoopes#new
         edit_scoope GET    /:user_name/scoopes/:id/edit(.:format)      scoopes#edit
              scoope GET    /:user_name/scoopes/:id(.:format)           scoopes#show
                     PATCH  /:user_name/scoopes/:id(.:format)           scoopes#update
                     PUT    /:user_name/scoopes/:id(.:format)           scoopes#update
                     DELETE /:user_name/scoopes/:id(.:format)           scoopes#destroy

我的勺子桌：

create_table "scoopes", force: :cascade do |t|
  t.string   "name"
  t.integer  "user_id"
  t.datetime "created_at", null: false
  t.datetime "updated_at", null: false
end

路线：

devise_for :users, :controllers => { :registrations => "user/registrations" }
root "posts#index" 
scope '/:user_name' do
 resources :scoopes
end
get ':user_name', to: 'profiles#show', as: :profile  
get ':user_name/edit', to: 'profiles#edit', as: :edit_profile  
patch ':user_name/edit', to: 'profiles#update', as: :update_profile  
................

Answer 1

您的呼叫失败，因为您使用的是nested route，正如scoope belongs to user 关系所定义的那样。

在routes.rb中，你可以在user和scoope之间设置ReSTful路由，如下：

resources :users do
  resources :scoopes
end

这个符号应该给你你需要的嵌套路由：

edit_user_scoope_path

要组织user_name 下的嵌套对象，请尝试：

scope "/:user_name" do
  resources :posts
end

这应该给你这样的路线：

edit_scoope GET /:user_name/scoopes/:id/edit(.:format) scoopes#edit

Answer 2

问题在于您的routes.rb 文件。您可以添加如下嵌套路由：

resources :users do
  resources :scoopes
end 

这将输出如下所示的 url。从这个输出中你可以清楚地看到路径将是 user_scoope_path(current_user, @scoope) 。

                                                                                                                                             scoopes#index
                                                            POST     /users/:user_id/scoopes(.:format)                                          scoopes#create
                                            new_user_scoope GET      /users/:user_id/scoopes/new(.:format)                                      scoopes#new
                                           edit_user_scoope GET      /users/:user_id/scoopes/:id/edit(.:format)                                 scoopes#edit
                                                user_scoope GET      /users/:user_id/scoopes/:id(.:format)                                      scoopes#show
                                                            PATCH    /users/:user_id/scoopes/:id(.:format)                                      scoopes#update
                                                            PUT      /users/:user_id/scoopes/:id(.:format)                                      scoopes#update
                                                            DELETE   /users/:user_id/scoopes/:id(.:format)                                      scoopes#destroy

希望对您有所帮助。