quality_control_oca: Broken quality control reference related-type tests

[giarve]

Module

quality_control_oca

To Reproduce

Affected versions: 16.0

Steps to reproduce the behavior:

1. Create a new test
2. Select type: Related
3. Enjoy a blank list

[StuartJMackintosh]

+1

[cparadis-impressfoods]

I've posted a similar issue #1286 a few months ago. There was also #823 dating back to V14 with a similar bug. I just retried the module on a new dev database and experiencing the same issue. As per my bug report, I was able to reproduce the bug on runboat for versions going back to V14.
I've received no response on my initial issue.

[aviejo]

Conceptually, what is that field for? What should it contain?

[cparadis-impressfoods]

Conceptually, what is that field for? What should it contain?

It should contain the object reference for related fields. Right now

Currently, the selection values for this field are ['s','e','t','(',')'], which strangely is the string representation of the return value of the object_selection_values() method of qc.test:
https://github.com/OCA/manufacture/blob/171badef793a255a8d5763f55f1be19a5a87c2f0/quality_control_oca/models/qc_test.py#L21C2-L21C3
Since it's a related field, I would expect it to be a list of possible models to link the test to: pickings, production_orders, etc.

[aviejo]

I see the technical problem and understand it, but not functionally, I don't know what it's for, what philosophy and if it's relevant.

It is possibly related to this field of inspections. and can be a filter for when an inspection is for a reference.

Could that be its function? filter the bring test window?