Hi Alice Many-to-many functionality is available in QGIS, see here:
https://gis.stackexchange.com/a/233944/9839 usability-wise it's sometimes still a bit tricky though. Regards Matthias On 09/11/2018 03:21 PM, Alice MARTIN wrote: > Hello, > > I'm a QGIS user and I need information about a QGIS functionnality which > doesn't exist yet to my knowledge. Here's my problem : > > I have a PostgreSQL database with two tables : > > - The first one contains geometry data defining hiking sections > - The second one contains a list of trails > One section can be linked to several trails, and a trail can be linked > to several sections : it's a many-to-many relationship. > > I then create an intermediate table to link trails with sections and use > a QGIS project I've created to update it. I've set appropriate > relationships in project's features. From there, when I click on a > section with the "Identify Features" tool or in the attribute table's > section, I can easily indicate which trail(s) is(are) linked. > > However, I need to do this section by section : I can't select several > sections at once and indicate in a few clicks which trail(s) are linked > to the sections I've selected. Is it possible to do that with QGIS ? I > couldn't find anything about it. > > If such a feature isn't available, do you know if its under development > or if there's a way to help to create this tool? Please let me know. > > Thank you in advance for your help. > > Best regards, > > Alice Martin > _______________________________________________ QGIS-Developer mailing list [email protected] List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
