Bug report #6616

Preview in expression builder not always showing

Added by Paolo Cavallini almost 11 years ago. Updated over 5 years ago.

Affected QGIS version:3.0.0 Regression?:No
Operating System: Easy fix?:No
Pull Request or Patch supplied:No Resolution:
Crashes QGIS or corrupts data:No Copied to github as #:15803


The preview in the field calculator expression builder is often missing. This happens because the expression text is evaluated against the first feature in the layer. If the expression doesn't evaluate for the first feature there will be no text.

Thanks Nathan for the explanation.


#1 Updated by Nathan Woodrow almost 11 years ago

Not sure the best way to handle this yet.

#2 Updated by Giovanni Manghi over 6 years ago

  • Easy fix? set to No
  • Regression? set to No

#3 Updated by Paolo Cavallini over 5 years ago

  • Description updated (diff)

Possibly the first 5 results could be shown, or the first valid (not NULL) result.

#4 Updated by Giovanni Manghi over 5 years ago

  • Affected QGIS version changed from master to 3.0.0

Also available in: Atom PDF