Feature request #8893

raise warning if an expression cannot be evaluated.

Added by Regis Haubourg over 3 years ago.

Status:Open Start Date:10/17/2013
Priority:Normal Due date:
Assigned to:- % Done:


Target version:Future Release - High Priority
Platform: Resolution:
Platform version: Pull Request or Patch supplied:No
Status info: Tag:


when opening an existing project using expressions or sql queries in Rule based classes or labels or feature subset, if expression cannot be evaluated, no warning is raised.
For example, the data field names have changed.
User have some empty classes, or totally empty classes or labels, and finding why can be long.
Having a soft warning would be sufficient. Something like "expression XXX on layer (labeling / style) could not be evaluated... please check"

Related issues

related to QGIS Application - Bug report #9071: Filter queries ignore "" Closed 11/16/2013

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