Mutilple控制器在一个页面上

Question

在我的ruby on rails应用程序中，我在每个页面中都有标​​准视图，它在每个页面上呈现导航视图，但是我有一个通知控制器，我希望在每个页面上使用，因此理论上我需要加载这个控制器和视图每一页上这是可能的

这<%= render 'shared/navigation' %>呈现一个视图，以便不使用 什么即时试图做我运行一个控制器，另一个控制器里面基本上

感谢您的帮助

PS 。我有我做一件事，不能找到任何五星级什么即时试图做

通知控制器代码

class NotificationsController < ApplicationController 
    before_action :set_notification, only: [:show, :edit, :update, :destroy] 

    # GET /notifications 
    # GET /notifications.json 
    def index 
    @notificationlastid = Notification.last 
    # if the id params is present 
    if params[:id] 
     # get all records with id less than 'our last id' 
     # and limit the results to 5 
     @notifications = Notification.where('id > ?', params[:id]).where(userid: current_user.id) 
    else 
     @notifications = Notification.where(userid: current_user.id) 
    end 
    respond_to do |format| 
     format.html 
     format.js 
    end 
    end 

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

    # GET /notifications/new 
    def new 
    @notification = Notification.new 
    end 

    # GET /notifications/1/edit 
    def edit 
    end 

    # POST /notifications 
    # POST /notifications.json 
    def create 
    @notification = Notification.new(notification_params) 

    respond_to do |format| 
     @notification.userid = current_user.id 
     if @notification.save 
     format.html { redirect_to @notification, notice: 'Notification was successfully created.' } 
     format.json { render action: 'show', status: :created, location: @notification } 
     else 
     format.html { render action: 'new' } 
     format.json { render json: @notification.errors, status: :unprocessable_entity } 
     end 
    end 
    end 

    # PATCH/PUT /notifications/1 
    # PATCH/PUT /notifications/1.json 
    def update 
    respond_to do |format| 
     if @notification.update(notification_params) 
     format.html { redirect_to @notification, notice: 'Notification was successfully updated.' } 
     format.json { head :no_content } 
     else 
     format.html { render action: 'edit' } 
     format.json { render json: @notification.errors, status: :unprocessable_entity } 
     end 
    end 
    end 

    # DELETE /notifications/1 
    # DELETE /notifications/1.json 
    def destroy 
    @notification.destroy 
    respond_to do |format| 
     format.html { redirect_to notifications_url } 
     format.json { head :no_content } 
    end 
    end 

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

    # Never trust parameters from the scary internet, only allow the white list through. 
    def notification_params 
     params.require(:notification).permit(:content, :description) 
    end 
end 

Answer 1

你所有的服务器端网页是由每一个时间控制器渲染。这是导轨工作的方式。 然后，一旦你的页面已经被加载，你可以使用客户端代码（JavaScript）来从你的“NotificationsController”中获取通知。这实际上是一种很常见的模式，也是解决问题的好方法。 想象一下，当用户检查页面时会产生新的通知。用一个简单的Ajax代码，轮询“NotificationsController”每X秒，你甚至能打印出来给用户的通知，而他们到达

一个例子：shared/_notifications.html.erb

<script> 
$(function() { 
    $.ajax({ 
    url: <%= [path_to_your_notifications_controller] %> 
    }).done(function(data) { 
    $("#mynotificationsdiv").html(data); 
    }); 
}); 
</script> 

现在，假设你有一个HomeController的和DashboardController，都有通知在他们的观点中显示

home/index.html.erb

<div id='mynotificationsdiv'></div> 

<%= render 'shared/notifications' %> 

“仪表板/ index.html.erb”

<div id='mynotificationsdiv'></div> 

<%= render 'shared/notifications' %>