Bug report #14235: Merge selected features tool corrupts data when columns are defined as "hidden" - QGIS Application - QGIS Issue Tracking

Bug report #14235

Merge selected features tool corrupts data when columns are defined as "hidden"

Added by David Beni - arx iT almost 9 years ago. Updated almost 9 years ago.

Status:	Closed
Priority:	High
Assignee:	Nyall Dawson
Category:	Digitising
Affected QGIS version:	master	Regression?:	No
Operating System:		Easy fix?:	No
Pull Request or Patch supplied:	No	Resolution:
Crashes QGIS or corrupts data:	Yes	Copied to github as #:	22232

Description

This bug concerns the "Merge selected features" tool from the "Advanced Digitizing Toolbar". A sample project is enclosed with the report to reproduce.

Steps :

Open the enclosed project
Zoom to the "BATIMENT" layer, there are 2 features overlapping
Turn on editing on this layer
Select the two features
Select the "Merge selected features" tool from the "Advanced Digitizing Toolbar"
Keep the default settings in the merge dialog
Validate to launch the merge
The features are deleted, no new features created
Open the "BATIMENTS" layer properties, go to the "Fields" section
For the "ImportId" field, set the editor widget to "Text editor", instead of "Hidden"
Validate and close the properties
Merge again the 2 features with the defaults settings
The merge is now working

The problem seems to come from this hidden "ImportId" field, because if you make the test with the "OGC_FID" field, the merge works in all cases.

MergeBug.zip - Project to reproduce the bug (330 KB) David Beni - arx iT, 2016-02-05 02:42 AM

Associated revisions

Revision 1566e37a
Added by Nyall Dawson almost 9 years ago

Fix merge attribute dialog mangles field values when layer has hidden
fields (fix #14235)

History

#1 Updated by Giovanni Manghi almost 9 years ago

Subject changed from Merge selected features tool deletes features in certain case to Merge selected features tool corrupts data when columns are defined as "hidden"
OS version deleted (~~8.1~~)
Operating System deleted (~~Windows~~)
Priority changed from Normal to High
Crashes QGIS or corrupts data changed from No to Yes

Does not seems to happen just in special cases... any time you have an hidden column that is not the PK this operation will lead to this data corruption...