如何在 Twig 中渲染一棵树 [英] How to render a tree in Twig

问题描述

我想渲染一棵深度不确定的树(孩子的孩子的孩子，等等).我需要递归遍历数组；我怎样才能在 Twig 中做到这一点?

I would like to render a tree with an undetermined depth (children of children of children, etc.). I need to loop through the array recursively; how can I do this in Twig?

推荐答案

我玩弄了 domi27 的想法 并想出了这个.我创建了一个嵌套数组作为我的树，['link']['sublinks'] 为 null 或另一个相同的数组.

I played around with domi27's idea and came up with this. I made a nested array as my tree, ['link']['sublinks'] is null or another array of more of the same.

模板

要递归的子模板文件:

<!--includes/menu-links.html-->
{% for link in links %}
    <li>
        <a href="{{ link.href }}">{{ link.name }}</a>
        {% if link.sublinks %}
            <ul>
                {% include "includes/menu-links.html" with {'links': link.sublinks} %}
            </ul>
        {% endif %}
    </li>
{% endfor %}

然后在主模板中，调用它(那里有一些多余的with"东西):

Then in the main template, call this (kind of redundant 'with' stuff there):

<ul class="main-menu">
    {% include "includes/menu-links.html" with {'links':links} only %}
</ul>

宏

使用宏可以达到类似的效果:

A similar effect can be achieved with macros:

<!--macros/menu-macros.html-->
{% macro menu_links(links) %}
    {% for link in links %}
        <li>
            <a href="{{ link.href }}">{{ link.name }}</a>
            {% if link.sublinks %}
                <ul>
                    {{ _self.menu_links(link.sublinks) }}
                </ul>
            {% endif %}
        </li>
    {% endfor %}
{% endmacro %}

在主模板中，执行以下操作:

In the main template, do this:

{% import "macros/menu-macros.html" as macros %}
<ul class="main-menu">
    {{ macros.menu_links(links) }}
</ul>

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