Question

在我的ruby on rails应用程序中，我在每个页面都有标准视图，在每个页面上呈现导航视图，但我有一个通知控制器，我希望在每个页面上使用，所以理论上我需要加载此控制器和视图在每一页上都是可能的

此<%= render 'shared/navigation' %>呈现视图，因此无用我试图做什么我在另一个控制器内运行控制器基本上

感谢您的帮助

PS。我已经好好看看，找不到任何适合我试图做的事情

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

所有服务器端页面每次都由一个控制器呈现。这是rails的工作方式。然后，一旦您的页面被加载，您就可以使用客户端代码（javascript）从您的＆＃34; NotificationsController＆＃34;中获取通知。这实际上是一种非常常见的模式，也是解决问题的好方法。想象一下，当用户检查页面时会出现新的通知。使用简单的ajax代码，轮询＆＃34; NotificationsController＆＃34;每隔X秒，您甚至可以在用户到达时打印出通知

示例：shared/_notifications.html.erb

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

现在假设您有一个HomeController和DashboardController，两者都有通知显示在他们的视图中

home/index.html.erb

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

<%= render 'shared/notifications' %>

＆＃39;仪表板/ index.html.erb＆＃39;

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

<%= render 'shared/notifications' %>

一页上的多个控制器

1 个答案: