for 循环开始标记中的 Twig If 语句 [英] Twig If statement within for loop opening tag

问题描述

我有这段代码，它应该计算从对象检索的 for 循环中的项目.此代码在 symfony 5.0 项目上运行，使用 php 7.2.5 和 twig-bundle 5.0

I have this code that is supposed to count items in a for loop retrieved from an object. This code is running on a symfony 5.0 project with php 7.2.5 and twig-bundle 5.0

{% set sent_mails = 0 %}

 {% for email in emails if email.status == 1 %}
    {% set sent_mails = (sent_mails + 1) %}
 {% endfor %}

{{ sent_mails }}

它给出了以下错误:

当我使用 php 7.1.3 和 twig-bundle 4.2 在 Symfony 4.2 上运行相同的代码时，一切正常，没有错误.

When I run this same code on Symfony 4.2 using php 7.1.3 and twig-bundle 4.2, everything works without an error.

twig-bundle 代码语法是否有任何更改，我没有正确使用或缺少什么?

is there any change to the twig-bundle code syntax that I am not using correctly or what am I missing?

推荐答案

我找到了一种通过使用 Twitter 用户推荐的过滤器来实现这一目标的方法:@dbrumann

I found a way of achieving this by using filter as recommended by Twitter user: @dbrumann

{% set sent_mails = 0 %}
   {% for email in emails|filter(email => email.status == 1) %}
    {% set sent_mails = (sent_mails + 1) %}
   {% endfor %}

{{ sent_mails }}

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