Hi Luca, Sounds like a case for Python logic! General principles are explained here: http://nathanw.net/2011/09/05/qgis-tips-custom-feature-forms-with-python-logic/
Also nice, and probably exactly what you are looking for: http://medspx.fr/blog/Qgis/cascade_forms/ Cheers Stefan From: qgis-user-boun...@lists.osgeo.org [mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of Luca Lanteri Sent: 1. oktober 2015 22:07 To: qgis-user <Qgis-user@lists.osgeo.org> Subject: [Qgis-user] QGIS - value relation widget Hi to all, I need to build a form when the value of a combo are filtered basing on the value of anoter combobox. I have a first combo where I choose the region and a second with the municipalities. I need that the second combo shows only the municipalities of the choosed region. I tried to use use the widget "relationship value" with the a filter like classe_munic = attribute($currentfeature, 'classe_munic') without any success. Has anyone ever done something similar? Thank in advance Luca
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