如果给定数组中至少存在一个属性，则检查 twig [英] Check in twig if at least on property exists in a given array

问题描述

假设我有一个数组 $cars 其中 $cars = [$toyota, $vw] 和

Let's assume I have an array $cars where $cars = [$toyota, $vw] and

$toyota= [
    'id' => 1,
    'color' => 'green',
  ];

$vw= [
    'id' => 7,
    'color' => 'red',
  ];

我想在 twig 中检查是否至少有一个汽车 ID 存在于专用数组 ([3, ,7, 15]) 中.

I wanna do a check in twig to see if at least one of the cars ID exists in a dedicated array ([3, ,7, 15]).

最好的方法是什么?执行 for 循环并不理想，因为如果我发现第一个元素符合我的条件，我就无法执行 break.如果两个元素都满足条件，我也不想打印两次文本.如果有一个元素，我只想打印一个文本.

What's the best way to do this? Doing a for loop is not ideal since I cannot do a break if I found the first element matching my criteria. And I also don't wanna print a text twice if both elements satisfy the condition. I just want to print a text if one element does.

我试着做一些奇怪的事情，比如{% if cars in [3, 7, 15] %} .... {% endif %} 但如果显然不起作用，因为我需要检查 id 汽车，而不是物体......

I tried doing something weird like {% if cars in [3, 7, 15] %} .... {% endif %} but if obvously doesn't work since I need to check the id of a car, not the object...

非常感谢任何有关如何最好地解决此问题的建议.

Any suggestions on how to best solve this is much appreciated.

附:我知道在控制器中使用 array_filter 会更容易，但遗憾的是这对我不起作用.那是因为我使用 AJAX 并且在提交之后，我将无法再访问 cars 了.因此，我需要在视图中执行它..

P.S. I know using array_filter in the controller makes it much easier, but sadly that doesn't work for me. That's because I use AJAX and after a submit, I won't have access to cars anymore. Therefore, I need to do it in the view..

推荐答案

只需在 twig 中添加一个新的过滤器

Just add a new filter to twig

$twig = new Twig_Environment($loader);

$twig->addFilter(new Twig_SimpleFilter('has', function($haystack, $needles) {
    if (!is_array($needles)) $needles = [ $needles, ];
    return count(array_intersect($haystack, $needles)) > 0;
});

然后您可以在 twig

{% set data = [ 'foo', 'bar', 'foobar', 'lorem', 'lipsum' ] %}
{% if data | has('foo') %}
    data contains foo
{% endif %}

{% if data | has(['lorem', 'lipsum', 'boat']) %}
    data contains lorem, lipsum or boat
{% endif %}

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