Bug report #20251
virtual fields can't be filtered
|Affected QGIS version:||3.5(master)||Regression?:||No|
|Operating System:||Easy fix?:||No|
|Pull Request or Patch supplied:||No||Resolution:|
|Crashes QGIS or corrupts data:||No||Copied to github as #:||28072|
After creating a virtual field with $area (float), it's not possible to filter on this variable - they don't appear on the list. It works for normal variables.
I don't know if this is a bug or a missing feature (perhaps you can select those fields by virtual layers only?).