How to populate up variables from included twig template
Question
I want to be able to populate up variables from included twig templates, just like when you're extending another template. Here's an example:
I have base.twig as follows:
{# base.twig #}
<html>
<head></head>
<body class="body {{class_from_index}}">
<nav>...</nav>
{% block content %}
{% endblock %}
<footer>...</footer>
</body>
</html>
and index.twig as follows:
{# index.twig #}
{% extends "base.twig" %}
{% set class_from_index = 'index' }
{% block content %}
<div>My actual content</div>
{% endblock %}
doing like this, the variable class_from_index is populated to base.twig , when I'm rendering index.twig . However if i have gallery.twig like this:
{# gallery.twig #}
{% set class_from_index = 'gallery' %}
<div>
A gallery
</div>
and adding {% include gallery.twig %} in index.twig , the variable class_from_index is not populated up to index.twig or base.twig . I know that if gallery.twig extends index.twig and index.twig extends base.twig , this will work, but this is not the case.
Is there a way to achieve what I'm trying to explain? Thank you :)
1 answers
solution1
1 ACCPTED 2015-11-09 08:14:45
The problem
If main.twig contains:
{% include "gallery.twig" %}
The compiled result will be:
protected function doDisplay(array $context, array $blocks = array())
{
// line 1
$this->loadTemplate("gallery.twig", "main.twig", 1)->display($context);
}
And if gallery.twig contains:
{% set var = 42 %}
The result is:
protected function doDisplay(array $context, array $blocks = array())
{
// line 1
$context["var"] = 42;
}
As you can see, the context is not given as a reference, so your variable can't be populated.
The PHP equivalent
The reason is quite obvious. It looks very exotic to use variables from a lower scope to a upper one. That's like if you were doing in PHP:
<?php
function gallery() {
$var = 42;
}
gallery();
echo $var;
There must be a better solution to your problem... by designing your templates architecture another way. The question itself is not relevant, that's totally out of good practices.
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