relation with uuid generator

[lucienicolier]

What is the bug or the crash? What were your expectations and what actually happened?

Hi QField team,

I’ve encountered an issue with a QField project involving table relations and the UUID widget.

In my setup:

I have a main table related to another table.

The relation uses a UUID field (generated by the UUID generator widget) as the primary key in the main table and the foreign key in the related table.

This configuration works perfectly in QGIS, but the relation does not work properly in QField.

As a workaround, I replaced the UUID widget with a simple text edit widget and used an expression in the default value to generate the UUID. This made it work as expected in QField.

It seems that the UUID generator widget is not behaving consistently between QGIS and QField.

Thanks for your great work, and please let me know if I can provide a sample project or more details to help reproduce the issue.

Steps to reproduce the issue

1. I have a main table related to another table.
2. The relation uses a UUID field (generated by the UUID generator widget) as the primary key in the main table and the foreign key in the related table.

Version

3.7.9

Operating system name

Android

Operating system version

android 16

Reinstall QField

• I have a fresh install of the latest QField version, but the problem persists.
• Problem can be reliably reproduced, doesn't happen randomly.
• Problem happens with all files and projects, not only some files or projects.

Additional context

No response

[m-kuhn]

Thank you for reporting this @lucienicolier can you attach a sample project with the UUID widget so we can reproduce this behavior?

[nirvn]

@m-kuhn , I've got it on QFC (JaquierPointet/leve_chambres_yvonand_31711).

[nirvn]

@lucienicolier , I think the project on QFC migrated away from the UUID generator widget in favor of default values. While I think it's best practice, this prevents me from debugging this issue :) could I get a sample project that relies on the widget? Merci!