[Qgis-user] QGIS - value relation widget

[Luca Lanteri]

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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