Filter in Linking Dialogue of Relation Editor Widget (Request in QGIS)

[qgis-bot]

Request for documentation

From pull request qgis/QGIS#58448
Author: @signedav
QGIS version: 3.40

Filter in Linking Dialogue of Relation Editor Widget

PR Description:

While it's quite common to filter the parent entries in the drop down of the relation reference widget, in the relation editor one needed to enter the filter manually every time when linking children.

With this implementation one can configure a filter expression (with the scope of the target layer) on the relation editor configuration.

After that the link children dialogue is filtered accordingly.

Screencast.from.21.08.2024.09.43.10.webm

This resolves #58185

Some technical details:

• We pass the expression to linkFeature in QgsAbstractRelationEditorWidget
• The rest of the implementation (configuration etc.) are all done in the QgsRelationEditorWidget
• QgsFeatureSelectionDlg::setFilterExpression became public

PS. You might have seen that after the filter still the form of the first feature of the unfiltered list is shown - this is a minor bug that existed before and has nothing to do with this implementation.

Commits tagged with [need-docs] or [FEATURE]