Warning when identify a wastewater node

[urskaufmann]

Describe the bug
I get this warning:
WARNING Traceback (most recent call last):
File "C:\Users/KAU/AppData/Roaming/QGIS/QGIS3\profiles\tww_test/python/plugins\linking_relation_editor\gui\linking_relation_editor_widget.py", line 774, in afterSetRelations
self._checkTransactionGroup()
File "C:\Users/KAU/AppData/Roaming/QGIS/QGIS3\profiles\tww_test/python/plugins\linking_relation_editor\gui\linking_relation_editor_widget.py", line 788, in _checkTransactionGroup
connectionString = PluginHelper.connectionString(self.relation().referencedLayer().source())
AttributeError: 'NoneType' object has no attribute 'source'

To Reproduce
Exact steps to reproduce the behavior:

1. Select 'vw_wastewater_node' (Editing status does not matter)
2. Choose 'Identify Features' tool
3. Click on a wastewater node
4. See warning

Same behaviour when click on the Wastewater Nodes Tab in vw_tww_wastewater_structure

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots / data

Desktop (please complete the following information):

• TWW version 0.0.0
• QGIS Version 3.34.4
• OS Win 10

Additional context

[cymed]

Looks like there is a problem with the linking relation editor plugin. What version do you use?

[urskaufmann]

Linking Relation Editor

Provides a relation editor widget with an alternative link child dialog

Provides a relation editor widget with an alternative link child dialog

4 rating vote(s), 14834 downloads
Category Vector
Tags relation
More info homepage bug tracker code repository
Author OPENGIS.ch
Installed version 1.3.0
Available version (stable) v1.3.0 updated at 22.03.2024 11:08

[domi4484]

In QGIS, when we delete (maybe as well rename?) a relation, the corresponding relation editor widgets are not removed from the attribute forms. This is probably what happened with a relation in the table vw_tww_overflow. The relation editor widget seems configured with a non-existing relation (empty string).
@urskaufmann should be trottle_shut off unit-overflow?

I made a pull request for the Linking relation editor to not show a python exception but log a little more explicative warning opengisch/qgis-linking-relation-editor#51

Still this kind of issue can be hard to find. It would be good to find a solution in QGIS to warn the user about such kind of misconfiguration

[domi4484]

@ponceta maybe in the similar direction of qgis/QGIS#58973 we could propose to add a warning icon o something visual in the column Form Layout to indicate when an editor widget is configured for a no-more-existing field or a relation editor is configured for a no-more-existing relation

[ponceta]

@ponceta maybe in the similar direction of qgis/QGIS#58973 we could propose to add a warning icon o something visual in the column Form Layout to indicate when an editor widget is configured for a no-more-existing field or a relation editor is configured for a no-more-existing relation

Very good idea, I open a feature request in that sense, then we look to provide an estimation of such estimations to the QGIS CH Grants.

[ponceta]

See the request QGIS Side : qgis/QGIS#59001