如何在twig的template_from_string中注入变量？

Question

I want to use template variable (as string) inside a loop.

{# Define my template #}
{% set my_template %}
    <span>{{ job.title }}</span>
    ...
{% endset %}

{# Using the template inside a loop #}
{% for job in jobs %}
    {{ include(template_from_string(my_template), { 'job', job }) }}
{% endfor %}

I expect it shows the template content with the corresponding value for "job", but there is an error: "Variable job is not defined"

Answer 1

use macro https://twig.symfony.com/doc/2.x/tags/macro.html

{% macro my_template(job) %}
    <span>{{ job.title }}</span>
    ...
{% endset %}

{# Using the template inside a loop #}
{% for job in jobs %}
    {{ include(template_from_string(_self.my_template(job)), { 'job', job }) }}
{% endfor %}

Answer 2

I think your include call has a mistake in passing the parameters. You are providing a regular array instead of the hash (using the comma instead of the colon):

{{ include(template_from_string(_self.my_template(job)), { 'job': job }) }}

Answer 3

Another option is to use the verbatim tag. This stops twig parsing the variables, and force string, so we can we run as twig template later on.

Without verbatim :

{# Define my template #}
{% set jobs = ['11', '22'] %}
{% set job = 'outside' %}

{% set my_template %}
  <span>{{ job }}</span>
{% endset %}

{# Using the template inside a loop #}
{% for job in jobs %}
  {{ include(template_from_string(my_template), { 'job': job }) }}
{% endfor %

Output: outside outside (wrong)

With verbatim :

{# Define my template #}
{% set jobs = ['11', '22'] %}
{% set job = 'outside' %}

{% set my_template %}
  {% verbatim  %}
    <span>{{ job }}</span>
  {% endverbatim %}
{% endset %}

{# Using the template inside a loop #}
{% for job in jobs %}
  {{ include(template_from_string(my_template), { 'job': job }) }}
{% endfor %

Output: 11 22 (correct)

Bonus - Drupal - no template_from_string() With verbatim :

{# Define my template #}
{% set jobs = ['11', '22'] %}
{% set job = 'outside' %}

{% set my_template %}
  {% verbatim  %}
    <span>{{ job }}</span>
  {% endverbatim %}
{% endset %}

{# Using the template inside a loop #}
{% for job in jobs %}
  {{ {'#type': 'inline_template', '#template': my_template, '#context': {'job': job} } }}
{% endfor %

Output: 11 22 (correct)