Hi, The @current_feature is, according to the doc[0], available when editing in attribute table and form contexts which are not actually the one you have, Matteo.
[0] https://github.com/qgis/QGIS/blob/master/src/core/expression/qgsexpression.cpp#L861and in documentation https://docs.qgis.org/3.10/fr/docs/user_manual/working_with_vector/expression.html#variables Greetings, Harrissou Le mer. 8 juil. 2020 à 14:51, Andreas Neumann <a.neum...@carto.net> a écrit : > Hi Matteo, > > The "$" prefix marks a function without arguments, "@" are variables. > Sometimes both variants exist, as you have discovered. Mainly due to > historic reasons and the fact that the "$"-stuff is around for a lont time > already, but the variables where added quite a bit later. > > Are you sure that "@current_feature" really exists? I can't find it in my > expression builder (in layer scope). > > You are probably aware that variables have different scopes (global, > project, layer, layout, etc.) - some variables are only available in some > scopes, because they wouldn't work in other scopes or it wouldn't make > sense there. > > Greetings, > > Andreas > > On 2020-07-08 14:03, matteo wrote: > > Hi all, > > before to file a ticker I'd like to have a small feedback. Maybe I'm > missing something but what is actually the difference between > $currentfeature and @current_feature? > > Because I was expecting to use @current_feature together with attribute > like: > > attribute(@current_feature, 'my_field') > > within the Default Value of a Field in the Attributes Form, but it > didn't work while > > attribute($currentfeature, 'my_field') > > works nice > > If someone has a small explanation I will gladly add it to the > documentation > > Cheers and thanks for any hint > > Matteo > _______________________________________________ > QGIS-Developer mailing list > QGIS-Developer@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer > > > _______________________________________________ > QGIS-Developer mailing list > QGIS-Developer@lists.osgeo.org > List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
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