路由嵌套资源和匹配控制器

Question

在过去的几天里,我遇到了一个问题,即让我的嵌套资源正确创建和显示.StackOverflow上有很多类似的问题和许多关于此的博客文章,但它们似乎都处理旧版本的Rails或其他问题.我正处于一旦我最终修复某些东西,另一个错误弹出的地步.我已经把它缩小到我犯了一个愚蠢的错误或错字太缺乏经验而无法注意到.

我有一个属于Venue模型的Jobs模型.场地工作正常,我甚至可以在每个Venue下找到我的嵌套Jobs索引,并调出New和Edit表单,但是去'Show'或创建一个新Job导致了一个undefined method错误.经过大量的搜索,我发现了很多同样的问题,并试图实现他们的修复,但现在我得到一个路由错误.

我的大部分混淆来自何时离开@,何时使用:venue_id而不是:id in params等.我看到的每个例子似乎都有不同的方式,我似乎无法让它们中的任何一个工作我.

任何正确方向的碰撞都会非常有帮助.

路由错误

No route matches {:action=>"show", :controller=>"jobs", :venue_id=>#<Venue id: 1, name: "Burger Chef", city: "Chicago", state: "Illinois", areacode: 60614, created_at: "2013-02-05 21:33:41", updated_at: "2013-02-06 23:01:05", avatar_file_name: nil, avatar_content_type: nil, avatar_file_size: nil, avatar_updated_at: nil>}

的routes.rb

Twist::Application.routes.draw do


  resources :users
  devise_for :users

  resources :venues do
    resources :jobs
  end

end

jobs_controller.rb

class JobsController < ApplicationController
  # GET /jobs
  # GET /jobs.json
  before_filter :get_venue

  def get_venue
    @venue = Venue.find(params[:venue_id])
  end

  def index
    @jobs = @venue.jobs

    respond_to do |format|
      format.html # index.html.erb
      format.json { render json: @jobs }
    end
  end

  # GET /jobs/1
  # GET /jobs/1.json
  def show
    @job = @venue.job.find(params[:id])

    if params[:id]
      @venue = Venue.where(:id => params[:id]).first
      @jobs = @venue.job_url
    else
      @jobs = Jobs.all
    end

    respond_to do |format|
      format.html # show.html.erb
      format.json { render json: @job }
    end
  end

  # GET /jobs/new
  # GET /jobs/new.json
  def new
    @job = @venue.jobs.build

    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @job }
    end
  end

  # GET /jobs/1/edit
  def edit
    @job = @venue.job.find(params[:venue_id])


  end

  # POST /jobs
  # POST /jobs.json
  def create
    @job = @venue.jobs.new(params[:job])

    respond_to do |format|
      if @job.save


        format.html { redirect_to :action => :show, :id => @venue.id, 
                      notice: 'Job was successfully created.' }
        format.json { render json: [@venue, @job],
                             status: :created, 
                             location: [@venue, @job] }
      else
        format.html { render action: "new" }
        format.json { render json: @job.errors, status: :unprocessable_entity }
      end
    end
  end

  # PUT /jobs/1
  # PUT /jobs/1.json
  def update
    @job = Job.find(params[:id])

    respond_to do |format|
      if @job.update_attributes(params[:job])
        format.html { redirect_to @job, notice: 'Job was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render action: "edit" }
        format.json { render json: @job.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /jobs/1
  # DELETE /jobs/1.json
  def destroy
    @job = Job.find(params[:id])
    @job.destroy

    respond_to do |format|
      format.html { redirect_to jobs_url }
      format.json { head :no_content }
    end
  end
end

venues_controller.rb

class VenuesController < ApplicationController
  # GET /venues
  # GET /venues.json


  def index
    @venues = Venue.all

    if params[:name]
      @user = User.where(:name => params[:name]).first
      @venues = @user.venues
    end

    respond_to do |format|
      format.html # index.html.erb
      format.json { render json: @venues }
    end
  end

  # GET /venues/1
  # GET /venues/1.json
  def show
    @venue = Venue.find(params[:id])


    respond_to do |format|
      format.html # show.html.erb
      format.json { render json: @venue }
    end
  end

  # GET /venues/new
  # GET /venues/new.json
  def new
    @venue = Venue.new

    respond_to do |format|
      format.html # new.html.erb
      format.json { render json: @venue }
    end
  end

  # GET /venues/1/edit
  def edit
    @venue = Venue.find(params[:id])

    #if session[:user_id] != @venue.user_id
    #  flash[:notice] = "Sorry, you cannot edit this venue."
    #  redirect_to(venues_path)
    # =>end
  end

  # POST /venues
  # POST /venues.json
  def create
    @venue = Venue.new(params[:venue_id])


    respond_to do |format|
      if @venue.save
        format.html { redirect_to @venue, notice: 'Venue was successfully created.' }
        format.json { render json: @venue, status: :created, location: @venue }
      else
        format.html { render action: "new" }
        format.json { render json: @venue.errors, status: :unprocessable_entity }
      end
    end
  end

  # PUT /venues/1
  # PUT /venues/1.json
  def update
    @venue = Venue.find(params[:id])

    respond_to do |format|
      if @venue.update_attributes(params[:venue])
        format.html { redirect_to @venue, notice: 'Venue was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render action: "edit" }
        format.json { render json: @venue.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /venues/1
  # DELETE /venues/1.json
  def destroy
    @venue = Venue.find(params[:id])
    @venue.destroy

    respond_to do |format|
      format.html { redirect_to venues_url }
      format.json { head :no_content }
    end
  end
end

job.rb

class Job < ActiveRecord::Base
  attr_accessible :description, :name, :requirement, :venue_id

  validates :name, :presence => true, :length => { :minimum => 3 }

  belongs_to :venue
end

venue.rb

class Venue < ActiveRecord::Base
  attr_accessible :areacode, :avatar, :city, :name, :state


  has_many :jobs

  has_attached_file :avatar, :styles => { :medium => "300x300>", :thumb => "100x100>" }

end

/jobs/show.html.erb

<p id="notice"><%= notice %></p>


    <% @job = Job.find(param[:venue_id]) %>

    <p>
      <b>Name:</b>
      <%= @job.name %>
    </p>

    <p>
      <b>Company:</b>
      <p><%= @venue.name %></p>
      <p><%= link_to @job.venue.name, venue_path(@venue) %></p>


    <p>
      <b>Job:</b>
      <%= @job.job_id %>
    </p>

    <p>
      <b>Description:</b>
      <%= @job.description %>
    </p>

    <p>
      <b>Requirement:</b>
      <%= @job.requirement %>
    </p>




    <%= link_to 'Edit', edit_venue_job_path(@venue, @job) %> |
    <%= link_to 'Back', venue_jobs_path(@venue, @job) %>

**/jobs/index.html.erb**

<div class="usergrid">

  <% jobs = @venue.jobs %>


  <% @venue.jobs.each do |job| %>
<div class = "user venue">

    <p>
        <h2><%= link_to job.name, venue_job_path(@venue) %></h2>
        <%= link_to 'Edit', edit_venue_job_path(@venue, job) %><br/>
        <%= link_to 'Delete', venue_jobs_path(@venue, @job), :confirm => 'Are you sure?', :method => :delete %>
</div>
<% end %>
<div style="clear:both"></div>
</div>




<%= link_to 'New Job', new_venue_job_path(@venue) %>

我意识到......

1. 这可能是一个非常明显的修复,但作为Rails的新手,肯定还有一些我不完全理解的基本原理.
2. 如果我发布太多或太少的代码请告诉我,我不完全确定这是最不必要的.
3. 可能存在多个错误,可能存在很多错误,其中许多错误可能是由于当我真的不知道自己在做什么时试图解决这个问题.我想自己解决这个问题,但是当我真的让它变得更糟时,我不能再处理它了.

我已经尝试搞乱路由,改变实际的链接和路由,搞乱范围,以及我可以找到的这些错误的许多常见修复,但似乎没有任何帮助.

谢谢!

Answer 1

错误是说没有给定params的路由:

{:action=>"show", :controller=>"jobs", :venue_id=> "an_id"}

您可以通过运行rake路由来检查,并且您将看到,由于作业嵌套在场地下,jobs#show控制器操作需要两个参数:(venue_id作业的"父")和id作业ID.

我快速检查了你的代码,我认为造成错误的原因之一是这一行:

<h2><%= link_to job.name, venue_job_path(@venue) %></h2>

这应该是

<h2><%= link_to job.name, venue_job_path(@venue, @job) %></h2>

基本上,只要你试图在不提供场地的情况下渲染到工作的链接,你就会遇到这种错误.

如果您需要更多详细信息或更多信息,请与我们联系.