Question

我正在创建一个状态板，它将显示多个服务器的特定详细信息，并需要有关更新视图的帮助。

背景我创建了主要设置，我有以下内容：

一个MySQL数据库，用于保存称为服务器的服务器信息
使用bootstrap显示内容
用于获取每个服务器信息和更新数据库的ruby脚本（application.rb文件中名为update_all_servers的方法）
每分钟运行ruby脚本的Cronjob

我需要帮助： 基本上，我需要帮助我的rails应用程序的javascript部分。我不太确定如何更新表中每个服务器的各个属性。我正在寻找的是javascript / ajax代码将每隔30秒定期从数据库中获取更新的值并更新视图而不刷新页面。

在我的index.html中，您可以看到我为server.rhel_version属性放置了一个id =“comments”。我以为我可以用$（＃comments）。更新它。在application.js文件或其他一些有效/逻辑方法中。

以下是我的所有源代码。如果你们可以指导我采取的方法，我可能会提供一些示例代码，我真的很感激！

/views/servers/index.html.erb

<%- model_class = Server.new.class -%>
<div class="page-header">
  <h1><%=t '.title', :default => model_class.model_name.human.pluralize %></h1>
</div>
<table class="table table-striped">
  <thead>
    <tr>
 <!--     <th><%= model_class.human_attribute_name(:id) %></th> -->
      <th><%= model_class.human_attribute_name(:hostname) %></th>
      <th><%= model_class.human_attribute_name(:port) %></th>
  <!--    <th><%= model_class.human_attribute_name(:username) %></th>
      <th><%= model_class.human_attribute_name(:password) %></th>
      <th><%= model_class.human_attribute_name(:ssh_username) %></th>
      <th><%= model_class.human_attribute_name(:ssh_password) %></th> 
      <th><%= model_class.human_attribute_name(:source_branch) %></th> -->
      <th><%= model_class.human_attribute_name(:source_revision) %></th>
      <th><%= model_class.human_attribute_name(:release) %></th>
      <th><%= model_class.human_attribute_name(:rhel_version) %></th>
      <th><%= model_class.human_attribute_name(:gpu_type) %></th>
      <th><%= model_class.human_attribute_name(:total_users) %></th>
      <th><%= model_class.human_attribute_name(:current_users) %></th>
      <th><%= model_class.human_attribute_name(:created_at) %></th>
      <th><%=t '.actions', :default => t("helpers.actions") %></th>
    </tr>
  </thead>
  <tbody>
    <% @servers.each do |server| %>
      <tr>
  <!--      <td><%= link_to server.id, server_path(server) %></td> -->
        <td><%= server.hostname %></td>
        <td><%= server.port %></td>
   <!--     <td><%= server.username %></td>
        <td><%= server.password %></td>
        <td><%= server.ssh_username %></td>
        <td><%= server.ssh_password %></td>
        <td><%= server.source_branch %></td> -->
        <td><%= server.source_revision %></td>
        <td><%= server.release %></td>
        <td id="comments"><%= server.rhel_version %></td>
        <td><%= server.gpu_type %></td>
        <td><%= server.total_users %></td>
        <td><%= server.current_users %></td>
        <td><%=l server.created_at %></td>
        <td>
          <%= link_to t('.edit', :default => t("helpers.links.edit")),
                      edit_server_path(server), :class => 'btn btn-mini' %>
          <%= link_to t('.destroy', :default => t("helpers.links.destroy")),
                      server_path(server),
                      :method => :delete,
                      :confirm => t('.confirm', :default => t("helpers.links.confirm", :default => 'Are you sure?')),
                      :class => 'btn btn-mini btn-danger' %>
        </td>
      </tr>
    <% end %>
  </tbody>
</table>

<%= link_to t('.new', :default => t("helpers.links.new")),
            new_server_path,
            :class => 'btn btn-primary' %>

/controllers/servers_controller.rb

class ServersController < ApplicationController
  # GET /servers
  # GET /servers.json
  def index
    @servers = Server.all

    update_all_servers

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

  # GET /servers/1
  # GET /servers/1.json
  def show
    @server = Server.find(params[:id])

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

  # GET /servers/new
  # GET /servers/new.json
  def new
    @server = Server.new

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

  # GET /servers/1/edit
  def edit
    @server = Server.find(params[:id])
  end

  # POST /servers
  # POST /servers.json
  def create
    @server = Server.new(params[:server])

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

  # PUT /servers/1
  # PUT /servers/1.json
  def update
    @server = Server.find(params[:id])

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

  # DELETE /servers/1
  # DELETE /servers/1.json
  def destroy
    @server = Server.find(params[:id])
    @server.destroy

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

/assets/javascripts/application.js

// This is a manifest file that'll be compiled into application.js, which will include all the files
// listed below.
//
// Any JavaScript/Coffee file within this directory, lib/assets/javascripts, vendor/assets/javascripts,
// or vendor/assets/javascripts of plugins, if any, can be referenced here using a relative path.
//
// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
// the compiled file.
//
// WARNING: THE FIRST BLANK LINE MARKS THE END OF WHAT'S TO BE PROCESSED, ANY BLANK LINE SHOULD
// GO AFTER THE REQUIRES BELOW.
//
//= require jquery
//= require jquery_ujs
//= require twitter/bootstrap
//= require_tree .

观点截图： statusboard view

Answer 1

您可以使用jQuery.ajax执行所有这些操作，如果您搜索，则可以轻松找到相关的问题/答案，例如How to fire AJAX request Periodically?

Rails - 定期更新某些标记而不刷新页面

1 个答案: