没有路由错误未初始化的常量站点

没有路由错误未初始化的常量站点

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Rails 5的多个嵌套属性，没有路由错误未初始化的常量站点

本文介绍了Rails 5的多个嵌套属性，没有路由错误未初始化的常量站点的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

你好，我有一个带有三个嵌套模型Client，Site和Damper的小应用程序.当我添加一个client或client_site时，一切都很好...但是当我添加一个阻尼器时，我得到

Hello I have a little app with three nested models Client, Site and Damper. When I add a client or client_site all is fine... but when i come to add a damper I get 

Routing Error
uninitialized constant Sites

在控制台中

Started GET "/clients/1/sites/1/dampers/new" for my ip at 2018-10-26 18:05:29 +1000

ActionController::RoutingError (uninitialized constant Sites):

app/controllers/clients/sites/dampers_controller.rb:1:in `<main>'

路线 

resources :clients do
  resources :sites, controller: 'clients/sites' do
    resources :dampers, controller: 'clients/sites/dampers'
  end
end

模型

app/models/client.rb

app/models/client.rb

class Client < ApplicationRecord
  has_many :sites
end

app/models/site.rb

app/models/site.rb

class Site < ApplicationRecord
  belongs_to :client
  has_many :dampers
end

app/models/damper.rb

app/models/damper.rb

class Damper < ApplicationRecord
  belongs_to :site
end

请注意，我犯了一个错误，该错误原本是:sites，但是即使更改了此错误，仍然存在.

please note I had made a mistake and this was originally :sites but even after changing this the fault remained.

控制器

app/controllers/clients_controller.rb

app/controllers/clients_controller.rb

class ClientsController < ApplicationController
  before_action :set_client, only: [:show, :edit, :update, :destroy]

  # GET /clients
  # GET /clients.json
  def index
    @clients = Client.all
  end

  # GET /clients/1
  # GET /clients/1.json
  def show
    @client = Client.find(params[:id])
    @sites = @client.sites
  end

  # GET /clients/new
  def new
    @client = Client.new
  end

  # GET /clients/1/edit
  def edit
  end

  # POST /clients
  # POST /clients.json
  def create
    @client = Client.new(client_params)

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

  # PATCH/PUT /clients/1
  # PATCH/PUT /clients/1.json
  def update
    respond_to do |format|
      if @client.update(client_params)
        format.html { redirect_to @client, notice: 'Client was successfully updated.' }
        format.json { render :show, status: :ok, location: @client }
      else
        format.html { render :edit }
        format.json { render json: @client.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /clients/1
  # DELETE /clients/1.json
  def destroy
    @client.destroy
    respond_to do |format|
      format.html { redirect_to clients_url, notice: 'Client was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_client
      @client = Client.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def client_params
      params.require(:client).permit(:name)
    end
end

app/controllers/clients/sites_controller.rb

app/controllers/clients/sites_controller.rb

class Clients::SitesController < ApplicationController
  before_action :set_client
  before_action :set_site, except: [:new, :create]

  # GET /sites
  # GET /sites.json
  def index
    @sites = Site.all
  end

  # GET /sites/1
  # GET /sites/1.json
  def show
    @client = Client.find(params[:client_id])
    @site = @client.sites.find(params[:id])
  end

  # GET /sites/new
  def new
    @site = Site.new
  end

  # GET /sites/1/edit
  def edit
  end

  # POST /sites
  # POST /sites.json
  def create
    @site = Site.new(site_params)
    @site.client = @client

    respond_to do |format|
      if @site.save
        format.html { redirect_to @client, notice: 'Site was successfully created.' }
        format.json { render :show, status: :created, location: @client }
      else
        format.html { render :new }
        format.json { render json: @client.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /sites/1
  # PATCH/PUT /sites/1.json
  def update
    respond_to do |format|
      if @site.update(site_params)
        format.html { redirect_to @client, notice: 'Site was successfully updated.' }
        format.json { render :show, status: :ok, location: @site }
      else
        format.html { render :edit }
        format.json { render json: @client.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /sites/1
  # DELETE /sites/1.json
  def destroy
    @site.destroy
    respond_to do |format|
      format.html { redirect_to sites_url, notice: 'Site was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_site
      @site = Site.find(params[:id])
    end

  def set_client
    @client = Client.find(params[:client_id])
  end

    # Never trust parameters from the scary internet, only allow the white list through.
    def site_params
      params.require(:site).permit(:name, :client_id)
    end
end

app/controllers/clients/sites/dampers_controller.rb

app/controllers/clients/sites/dampers_controller.rb

class Sites::DampersController < ApplicationController
  before_action :set_client
  before_action :set_site
  before_action :set_damper, except: [:new, :create]

  # GET /dampers
  # GET /dampers.json
  def index
    @dampers = Damper.all
  end

  # GET /dampers/1
  # GET /dampers/1.json
  def show
  end

  # GET /dampers/new
  def new
    @damper = Damper.new
  end

  # GET /dampers/1/edit
  def edit
  end

  # POST /dampers
  # POST /dampers.json
  def create
    @damper = Damper.new(damper_params)
    @damper.site = @site

    respond_to do |format|
      if @damper.save
        format.html { redirect_to @site, notice: 'Damper was successfully created.' }
        format.json { render :show, status: :created, location: @site }
      else
        format.html { render :new }
        format.json { render json: @site.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /dampers/1
  # PATCH/PUT /dampers/1.json
  def update
    respond_to do |format|
      if @damper.update(damper_params)
        format.html { redirect_to @site, notice: 'Damper was successfully updated.' }
        format.json { render :show, status: :ok, location: @site }
      else
        format.html { render :edit }
        format.json { render json: @site.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /dampers/1
  # DELETE /dampers/1.json
  def destroy
    @damper.destroy
    respond_to do |format|
      format.html { redirect_to dampers_url, notice: 'Damper was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_damper
      @damper = Damper.find(params[:id])
    end
  def set_site
    @site = Site.find(params[:site_id])
  end
  def set_client
    @client = Client.find(params[:client_id])
  end

    # Never trust parameters from the scary internet, only allow the white list through.
    def damper_params
      params.require(:damper).permit(:location, :number, :site_id, :client_id)
    end
end

推荐答案

dampers_controller.rb位于controllers/clients/sites下，因此您需要将类名更改为

The dampers_controller.rb sits under controllers/clients/sites, so you need to change the class name to 

class Clients::Sites::DampersController < ApplicationController

代替

class Sites::DampersController < ApplicationController

为了命名空间

此外，我建议您看看 控制器命名空间和路由

Also, I recommend you to have a look at controller-namespaces-and-routing

这篇关于Rails 5的多个嵌套属性，没有路由错误未初始化的常量站点的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

08-21 18:12
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