仅在选项卡处于活动状态时加载数据

Question

我将所有数据渲染到页面一次(在单个网址' http:// localhost:9111/sale / ').

并显示在该页面上的不同选项卡中.

<div class="tab-base">
             <!--Nav Tabs-->
             <ul class="nav nav-tabs">
                <li class="active">
                   <a data-toggle="tab" href="#demo-lft-tab-1">Daily Sale</a>
                </li>
                <li>
                   <a data-toggle="tab" href="#demo-lft-tab-2">Channel Wise Sale</a>
                </li>
                <li>
                   <a data-toggle="tab" href="#demo-lft-tab-3">Returns</a>
                </li>
               </ul>
            </div>
     <div class="tab-content">
<form method="POST" action="{% url 'sale' %}">
   {% csrf_token %}

   <div id="demo-lft-tab-1" class="tab-pane fade active in">
      <div class="panel-body">
         <table data-toggle="table">
            <thead >
               <tr>
                  <th data-align="center" data-sortable="true">Day</th>
                  <th data-align="center" data-sortable="true">Sale Value</th>
                  <th data-align="center" data-sortable="true">Quantity Sold</th>
               </tr>
            </thead>
            <tbody>
               {% for day, val, qty in sale_data %}
               <tr>
                  <td>{{day}}</td>
                  <td>{{val}}</td>
                  <td>{{qty}}</td>
               </tr>
               {% endfor %}
            </tbody>
         </table>
      </div>
   </div>



<div id="demo-lft-tab-2" class="tab-pane fade">
   <div class="panel-body">
      <table data-toggle="table" >
         <thead>
            <tr>
               <th data-align="center" data-sortable="true">Channel</th>
               <th data-align="center" data-sortable="true">Brand</th>
               <th data-align="center" data-sortable="true">Category</th>
               <th data-align="center" data-sortable="true">Selling Price</th>
               <th data-align="center" data-sortable="true">Quantity Sold</th>
               <th data-align="center" data-sortable="true">Percentage %</th>
            </tr>
         </thead>
         <tbody>
            {% for channel,brand,category,selling_price,quantity_sold, percentage in sal_data %}
            <tr>
               <td>{{channel}}</td>
               <td>{{brand}}</td>
               <td>{{category}}</td>
               <td>{{selling_price}}</td>
               <td>{{quantity_sold}}</td>
               <td>{{percentage}}%</td>
            </tr>
            {% endfor %}
         </tbody>
      </table>
   </div>
</div>

<!--   here is more code for other tab same as above  -->
<!--  -->


</form>


</div>

但是当渲染数据很大时,页面加载会花费更多时间.

现在我想知道,如何仅为活动选项卡加载数据？

Answer 1

如果您使用Spring框架，那么使用分页概念。它将确保只需要获取所需的数据并且速度很快