使用动态参数调用Twig函数

I'm using Twig with Slim and their Twig-View view layer. This view layer has a function for creating URLs, which from the documentation looks like this:

{{ path_for('profile', { 'name': 'josh' }) }}

This works fine, but I have problems when the parameters are built with variables from dynamic data. For example this expression:

{{ path_for('profile', { 'name': '{{ PERSON.name }}' }) }}

Is simply evaluated as {{ PERSON.name }}. Twig does not parse the content of {{ PERSON.name }}, it just returns this as the value, so my URL looks something like /path/to/profile/{{ PERSON.name}}. If I move the expression outside my function call it is evaluated correctly.

I have looked at the attribute function, but can not figure out how to use this is my situation, as it seem more suited for calling functions dynamically on objects.

To use vars inside your twig expression, you don't have to use the {{.}} syntax. Just write the plain var and it should work.

{{ path_for('profile', { 'name': PERSON.name }) }}