Feature request #15461

Updated by Andreas Neumann over 4 years ago

In the relation reference widget it is possible to add new values without having to open the linked table first (comfortable).



We would, however, like to have a unique constraint on the "display expression"/"display column" to avoid double entries.



We need to discuss several options how to achieve this:



a) having a separate "value list manager" that takes care of it, but can also handle other stuff, like renaming/deleting values



b) Using the existing QGIS constraint mechanism (haven't found a way to check a newly entered value against other already existing values in the table though)



c) introducing a new "built in" Unique constraint on a table column

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