Twig: in_array 或 if 语句中的类似内容? [英] Twig: in_array or similar possible within if statement?

问题描述

我使用 Twig 作为模板引擎，我真的很喜欢它.但是，现在我遇到的情况肯定必须以比我发现的更简单的方式来完成.

I am using Twig as templating engine and I am really loving it. However, now I have run in a situation which definitely mustbe accomplishable in a simpler way than I have found.

我现在拥有的是:

{% for myVar in someArray %}    
    {% set found = 0 %}
    {% for id, data in someOtherArray %}
        {% if id == myVar %}
            {{ myVar }} exists within someOtherArray.
            {% set found = 1 %} 
        {% endif %}
    {% endfor %}

    {% if found == 0 %}
        {{ myVar }} doesn't exist within someOtherArray.
    {% endif %}
{% endfor %}

我正在寻找的东西更像是这样的:

What I am looking for is something more like this:

{% for myVar in someArray %}    
    {% if myVar is in_array(array_keys(someOtherArray)) %}
       {{ myVar }} exists within someOtherArray.
    {% else %}
       {{ myVar }} doesn't exist within someOtherArray.
    {% endif %}
{% endfor %}

有没有一种方法可以实现我还没有见过的?

Is there a way to accomplish this which I haven't seen yet?

如果我需要创建自己的扩展，如何在测试函数中访问 myVar?

If I need to create my own extension, how can I access myVar within the test function?

感谢您的帮助！

推荐答案

您只需要将第二个代码块的第二行从

You just have to change the second line of your second code-block from

{% if myVar is in_array(array_keys(someOtherArray)) %}

到

{% if myVar in someOtherArray|keys %}

in 是容器操作符，keys 一个返回数组键的过滤器.

in is the containment-operator and keys a filter that returns an arrays keys.

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