循环中的Twig变量范围

Question

来自twig documentation：

  

请注意，循环的范围是Twig;因此声明了一个变量   在循环内部无法访问for循环内部。如果你   想要访问变量，只需在循环之前声明它。

有人可以解释为什么以下代码：

# Bundle/Resources/views/parent
{% set id = 5 %}

# Bundle/Resources/views/child
{% extends 'Bundle::parent.html.twig' %}

{%block one%}
    {% for item in threeitemarray %}
        {% set id = id + 1 %}
        {{id}}
    {%endfor%}
{%endblock%}

{%block two%}
    {% for item in threeitemarray %}
        {% set id = id + 1 %}
        {{id}}
    {%endfor%}
{%endblock%}

返回6,7,8,6,7,8而不是6,7,8,9,10,11？如何设置它以返回后者？

Answer 1

试试这个

{% set id = 5 %}

{% for item in 0..3 %}
    {% set id = id + 1 %}
    {{id}}
{%endfor%}

{% for item in 0..3 %}
    {% set id = id + 1 %}
    {{id}}
{%endfor%}

Answer 2

如果您的块也在父Twig中定义，我认为您不能这样做。如果情况并非如此，请尝试：

# Bundle/Resources/views/parent
{% set id = 5 %}

# Bundle/Resources/views/child
{% extends 'Bundle::parent.html.twig' %}

{% set id = id %}

{%block one%}
    {% for item in threeitemarray %}
        {% set id = id + 1 %}
        {{id}}
    {%endfor%}
{%endblock%}

{%block two%}
    {% for item in threeitemarray %}
        {% set id = id + 1 %}
        {{id}}
    {%endfor%}
{%endblock%}