How to test the existence of a file in a webform email twig template

Question

I have a webform with a Document File field. In my twig email template, I want to test if that field is empty. For text area fields for example, this syntax works :

{% if webform_token('[webform_submission:values:question_text_area:value]', webform_submission) %} <br> <table> <tr> <th>Questions</th> </tr> <tr> <td>{{ webform_token('[webform_submission:values:question_text_area:value]', webform_submission) }}</td> </tr> </table> {% endif %}

But for a Document File field, the same syntax does not work, meaning that if no file is uploaded, that part of my template is still printed.

I tried

{% if webform_token('[webform_submission:values:join_a_file:value]', webform_submission) %}

or

{% if webform_token('[webform_submission:values:join_a_file:value]', webform_submission) is not null %}

or

{% if webform_token('[webform_submission:values:join_a_file]', webform_submission) is not null %}

and none of them work.

Does anybody know the proper syntax for what I'm trying to do? Thanks!

Answer 1

The solution is to do this

{% if webform_token('[webform_submission:values:file:clear]', webform_submission) %} FILE UPLOADED {% else %} NO FILE UPLOADED {% endif %}

Solution given first here : https://www.drupal.org/project/webform/issues/2969437