Hi
> On 27 Dec 2016, at 9:40 AM, Neumann, Andreas <a.neum...@carto.net> wrote: > > Hi Nyall, > > Thanks for clarifying. > > This needs to be properly documented and taught in QGIS courses. > > I wonder if it is not worth floating the idea of layer annotations - something like GDAL does with it's aux.xml files that we can store stuff like this in. It is a shame to open a layer in one project where you have serial counters implemented, and then have to redo it in another project (and remember to do it). I know it would only work for file based (or maybe QGIS Layer Files too?) datasets but I recon that would cover most use cases since the 'proper' databases already have mechanisms to deal with this. Along with that we could have the layer creation dialog include a serial field type which would set up the constraints and annotate them in the layer annotation file. Just a thought anyway... Regards Tim > Andreas > > On 2016-12-27 02:03, Nyall Dawson wrote: > >> On 23 December 2016 at 23:37, Paolo Cavallini <cavall...@faunalia.it >> <mailto:cavall...@faunalia.it>> wrote: >>> >>> Il 23/12/2016 14:32, Giovanni Manghi ha scritto: >>> >>>> The solution from the Gitter discussion >>>> >>>> aggregate( 'layername','max',"id")+1 >>> >>> thanks Giovanni >>> >>>> We need of course a more user friendly way to allow users have >>>> incremental/serial ids in their shapefiles... >>> >>> sure, e.g. a named preset expression, as previously suggested. >>> all the best. >> >> In master you can add UNIQUE and NOT NULL constraints to the field >> from within QGIS. This will cause QGIS to automatically populate it >> with a serial type value whenever a new feature is created. >> >> Nyall >> >> >>> -- >>> Paolo Cavallini - www.faunalia.eu <http://www.faunalia.eu/> >>> QGIS & PostGIS courses: http://www.faunalia.eu/training.html >>> <http://www.faunalia.eu/training.html> >>> https://www.google.com/trends/explore?date=all&geo=IT&q=qgis,arcgis >>> <https://www.google.com/trends/explore?date=all&geo=IT&q=qgis,arcgis> >>> _______________________________________________ >>> Qgis-developer mailing list >>> Qgis-developer@lists.osgeo.org <mailto:Qgis-developer@lists.osgeo.org> >>> List info: http://lists.osgeo.org/mailman/listinfo/qgis-developer >>> <http://lists.osgeo.org/mailman/listinfo/qgis-developer> >>> Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-developer >>> <http://lists.osgeo.org/mailman/listinfo/qgis-developer>_______________________________________________ >> Qgis-developer mailing list >> Qgis-developer@lists.osgeo.org <mailto:Qgis-developer@lists.osgeo.org> >> List info: http://lists.osgeo.org/mailman/listinfo/qgis-developer >> <http://lists.osgeo.org/mailman/listinfo/qgis-developer> >> Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-developer >> <http://lists.osgeo.org/mailman/listinfo/qgis-developer> > > _______________________________________________ > Qgis-developer mailing list > Qgis-developer@lists.osgeo.org > List info: http://lists.osgeo.org/mailman/listinfo/qgis-developer > Unsubscribe: http://lists.osgeo.org/mailman/listinfo/qgis-developer — Tim Sutton Co-founder: Kartoza Project chair: QGIS.org Visit http://kartoza.com <http://kartoza.com/> to find out about open source: Desktop GIS programming services Geospatial web development GIS Training Consulting Services Skype: timlinux IRC: timlinux on #qgis at freenode.net Kartoza is a merger between Linfiniti and Afrispatial
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