General Tag - For Loop Traversal Tag

forIterate over arrays, slice, and other objects.

forUsed to iterate over each item in the array, making the item available in the context variable.

Example Code

For example, to display the document list provided by archiveList:

{% for item in archives %}
<li class="item">
    <a href="/archive/{{item.Id}}" class="link">
        <h5 class="title">{{item.Title}}</h5>
    </a>
</li>
{% endfor %}

The program can also output the count in the for loop, as well as the remaining quantity, and it can also be used.pluralizeDetermine if the number is plural. For example:

{% for item in archives %}
<li class="item">
    <a href="/archive/{{item.Id}}" class="link">
        <h5 class="title">第{{ forloop.Counter }}篇，剩余{{ forloop.Revcounter}}篇，{{ forloop.Revcounter|pluralize:"多于1篇" }}：{{item.Title}}</h5>
    </a>
</li>
{% endfor %}

forIt can also be used.reversedReverse the array,sortedSort the array by int. For example:

{% for item in archives reversed %}
<li class="item">
    <a href="/archive/{{item.Id}}" class="link">
        <h5 class="title">{{item.Title}}</h5>
    </a>
</li>
{% endfor %}
{% for item in archives sorted %}
<li class="item">
    <a href="/archive/{{item.Id}}" class="link">
        <h5 class="title">{{item.Title}}</h5>
    </a>
</li>
{% endfor %}
{% for item in archives reversed sorted %}
<li class="item">
    <a href="/archive/{{item.Id}}" class="link">
        <h5 class="title">{{item.Title}}</h5>
    </a>
</li>
{% endfor %}

forAlso supports checking if the array is empty or null, using:emptyTo output the non-existent situation. For example:

{% for item in archives %}
<li class="item">
    <a href="/archive/{{item.Id}}" class="link">
        <h5 class="title">{{item.Title}}</h5>
    </a>
</li>
{% empty %}
<div>没有内容</div>
{% endfor %}

It is equivalent to using an if statement, but it can be written more concisely:

{% if archives %}
{% for item in archives %}
<li class="item">
    <a href="/archive/{{item.Id}}" class="link">
        <h5 class="title">{{item.Title}}</h5>
    </a>
</li>
{% endfor %}
{% else %}
<div>没有内容</div>
{% endif %}

cycletags. In a for loop, we can also usecycleTags, to loop and output each variable in the definition one by one.

Each time thiscycleWhen a tag is used, it will always produce one of its parameters.The first parameter is generated when it is encountered for the first time, the second parameter is generated when it is encountered for the second time, and so on.Once all parameters are exhausted, the marker will loop back to the first parameter and generate it again.

This tag is especially useful in loops. For example:

{% for item in archives %}
<li class="item">
    <a href="/archive/{{item.Id}}" class="link">
        <h5 class="title">Title,Id 逐个出现：{% cycle item.Title item.Id %}</h5>
    </a>
</li>
{% endfor %}

Or useasto define an alias, and then output through the alias:

{% for item in archives %}
<li class="item">
    <a href="/archive/{{item.Id}}" class="link">
        {% cycle item.Title item.Id as cycleitem %}
        <h5 class="title">Title,Id 逐个出现：{{ cycleitem }}</h5>
    </a>
</li>
{% endfor %}