Jinja2 和 Bootstrap 轮播 - "item active"

Question

我是 Jinja 的新手，这是我第一次 post 在 Stack Overflow 上。我正在尝试循环浏览由 bootstrap carousel/modal 处理的图像库。我能够让它发挥作用； <img> 和 <div> 呈现正确，但我无法循环遍历活动元素。在网上搜索，我发现宏可以帮助实现它，但我不熟悉使用它们。这是我正在处理的代码：

<div class="modal fade" id="myModalGal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
<div class="modal-dialog" role="document">
    <div class="modal-content">
        <div class="modal-body">
            <!-- Wrapper for slides -->
            <div id="carousel-example-generic" class="carousel slide" data-ride="carousel">
                <div class="carousel-inner">
                    <div class="item active">
                        {% for content in porte %} 
                        {% if content.gal_porte %} 
                        <img src="{{content.gal_porte}}" class="img-responsive" alt="test">
                        <div class="carousel-caption"></div>
                    </div>
                    <div class="item">
                        {% elif content.gal_porte %} <img src="{{content.gal_porte}}" class="img-responsive" alt="test1">
                        <div class="carousel-caption"></div>
                        {% endif %} 
                        {% endfor %}
                    </div>
                    <!-- Controls -->
                    <a class="home-icon left" href="#carousel-example-generic" role="button" data-slide="prev"> <i class="fa fa-arrow-left"></i>
                    </a> <a class="home-icon right" href="#carousel-example-generic" role="button" data-slide="next"> <i class="fa fa-arrow-right" style="text-align: right;"></i>
                    </a>
                </div>
            </div>
        </div>
        <div class="modal-footer">
            <button type="button" class="btn btn-default" data-dismiss="modal">Chiudi</button>
        </div>
    </div>
</div>

Answer 1

Jinja for 循环有计数器，因此您可以检查您是否在循环的第一次迭代中并将其设为活动幻灯片。

像这样：

<div class="carousel-inner">
  {% for content in porte %}
  <div class="item{% if loop.index == 1 %} active{% endif %}">
    <img src="{{content.gal_porte}}" class="img-responsive" alt="test1">
    <div class="carousel-caption"></div>
  </div>
  {% endfor %}
  <!-- Controls -->
  <a class="home-icon left" href="#carousel-example-generic" role="button" data-slide="prev"> 
    <i class="fa fa-arrow-left"></i>
  </a> 
  <a class="home-icon right" href="#carousel-example-generic" role="button" data-slide="next"> 
    <i class="fa fa-arrow-right" style="text-align: right;"></i>
  </a>
</div>

Jinja2 和 Bootstrap 轮播 - "item active"

Jinja2 and Bootstrap carousel - "item active"

html

python

jinja2

twitter-bootstrap