qc.test.object_id selection only offers invalid choices

[cparadis777]

Module

quality_control_oca

Describe the bug

The first selection menu of the qc.test.object_id field has 5 "empty" (no selection text) choices: "S", "e", "t", "(", ")".
No matter which value is selected, trying to select a model from the second selection menu causes an Odoo server error to appear.

To Reproduce

Affected versions: 14, 15, 16, 17
The same bug was reported previously, but marked stale:
V14: #823
V12: #562
I have reproduced the bug in runboat for V14, V15, V16 and V17 myself.

Steps to reproduce the behavior:

1. Create a new related test
2. Set the first selection of the object_id field
3. Try to selected a related model

Expected behavior
The user should be able to select a model from the second selection menu, and the options in the first selection menu should be visible.

Additional context

I don't have much experience with the module, but I checked the code and it seems the error would be located in QcTest.objectSelectionValue() method:

manufacture/quality_control_oca/models/qc_test.py

Line 21 in 4d44182

return set()

Odoo server error trace:
Traceback (most recent call last):
File "/opt/odoo/odoo/http.py", line 1748, in _serve_db
return service_model.retrying(self._serve_ir_http, self.env)
File "/opt/odoo/odoo/service/model.py", line 133, in retrying
result = func()
File "/opt/odoo/odoo/http.py", line 1775, in _serve_ir_http
response = self.dispatcher.dispatch(rule.endpoint, args)
File "/opt/odoo/odoo/http.py", line 1979, in dispatch
result = self.request.registry['ir.http']._dispatch(endpoint)
File "/opt/odoo/odoo/addons/base/models/ir_http.py", line 222, in _dispatch
result = endpoint(**request.params)
File "/opt/odoo/odoo/http.py", line 725, in route_wrapper
result = endpoint(self, *args, **params_ok)
File "/opt/odoo/addons/web/controllers/dataset.py", line 24, in call_kw
return self._call_kw(model, method, args, kwargs)
File "/opt/odoo/addons/web/controllers/dataset.py", line 20, in _call_kw
return call_kw(request.env[model], method, args, kwargs)
File "/opt/odoo/odoo/api.py", line 534, in getitem
return self.registry[model_name](self, (), ())
File "/opt/odoo/odoo/modules/registry.py", line 213, in getitem
return self.models[model_name]
KeyError: 't'

The above server error caused the following client error:
RPC_ERROR: Odoo Server Error
RPCError@http://oca-manufacture-17-0-4d44182ab4e5.runboat.odoo-community.org/web/assets/debug/web.assets_web.js:27806:9 (/web/static/src/core/network/rpc_service.js:11)
makeErrorFromResponse@http://oca-manufacture-17-0-4d44182ab4e5.runboat.odoo-community.org/web/assets/debug/web.assets_web.js:27832:19 (/web/static/src/core/network/rpc_service.js:37)
jsonrpc/promise</<@http://oca-manufacture-17-0-4d44182ab4e5.runboat.odoo-community.org/web/assets/debug/web.assets_web.js:27880:48 (/web/static/src/core/network/rpc_service.js:85)

[github-actions]

There hasn't been any activity on this issue in the past 6 months, so it has been marked as stale and it will be closed automatically if no further activity occurs in the next 30 days.
If you want this issue to never become stale, please ask a PSC member to apply the "no stale" label.