Project: QGIS
Version: 3.2.0
QGIS 3.2 introduces drill-down (cascading) form support, where the values available in one field depend on the values of other fields. This feature allows users to create “value-relation” expressions based on the current value of another field in the same form. When the user modifies a field’s value, the choices available in all related fields are filtered to match the new value – allowing a hierarchical filtering strategy (drill-down, or cascading) inside a form.
This feature was funded by Grant Boxer, NaturalGIS, Tudor Bărăscu, NotioGIS, République et canton de Neuchâtel, Arpa Piemonte, Nelson Silva, QGIS Danish User Group, Bo Victor Thomsen and Lene Fischer, North River Geographic
This feature was developed by Alessandro Pasotti (North Road)