如何使用break或在Twig模板中的for循环继续？ [英] How can I use break or continue within for loop in Twig template?

问题描述

我尝试使用一个简单的循环，在我的真实代码中，这个循环更加复杂，我需要 break 这样的迭代：

  {％发布在帖子中％} 
 {％如果post.id == 10％} 
 {＃break＃} 
 {％endif％} 
< h2> {{post.heading}}< / h2> 
 {％endfor％} 
  

如何使用 break 或继续在Twig中的PHP控制结构？

解决方案

通过设置一个新变量作为 break 迭代的标志，可以完成 ：

  {％set break = false％} 
 {％在帖子中发帖，如果不休息％} 
< h2> {{发帖.heading}}< / h2> 
 {％if post.id == 10％} 
 {％set break = true％} 
 {％endif％} 
 {％end for％} 
  

更难看的是 continue 的工作示例：

$ p $ {code> {％set continue = false％}
{％发表的帖子％}
{％if post.id == 10％}
{％set continue = true％}
{％endif％}
{％if not continue％}
< h2> {{post.heading }}< / H2>
{％endif％}
{％如果继续％}
{％set continue = false％}
{％endif％}
{％endfor％}

但是，没有表现盈利与内置的 break 和 continue 语句类似的行为，就像在PHP中一样。

I try to use a simple loop, in my real code this loop is more complex, and I need to break this iteration like:

{% for post in posts %}
    {% if post.id == 10 %}
        {# break #}
    {% endif %}
    <h2>{{ post.heading }}</h2>
{% endfor %}

How can I use behavior of break or continue of PHP control structures in Twig?

解决方案

This can be nearly done by setting a new variable as a flag to break iterating:

{% set break = false %}
{% for post in posts if not break %}
    <h2>{{ post.heading }}</h2>
    {% if post.id == 10 %}
        {% set break = true %}
    {% endif %}
{% endfor %}

More ugly, but work example for continue:

{% set continue = false %}
{% for post in posts %}
    {% if post.id == 10 %}
        {% set continue = true %}
    {% endif %}
    {% if not continue %}
        <h2>{{ post.heading }}</h2>
    {% endif %}
    {% if continue %}
        {% set continue = false %}
    {% endif %}
{% endfor %}

But there is no performance profit, only similar behaviour to the built-in break and continue statements like in flat PHP.

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