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Hello,
I have 2 layers (luminaires and cables) in a geopackage db, and I've defined a trigger in order to update the position of the line when a point is moved (the line should follow the position of the point). The problem is that after the trigger acts, the line moved by the trigger disappears. In fact when I look at the db, the geometry of that line seems to be correct, but the line is not drawn in QGIS.
I've done exactly the same oprations with a spatialite db and it works correctly. The problem is only with a geopackqage db.
You'll find attached the files used (a geopackage version with the problem and a spatialite version that works correctly), and you can see a video that shows you the problem at this address:
https://sigmoe.fr/problem-qgis-geopackage-trigger
password for the video: sgmqgisbug!180323
Same problem with v3.00.
The trigger used is :
CREATE TRIGGER luminaires_upd_updcablesgeom
AFTER UPDATE
ON luminaires
BEGIN
UPDATE cables SET
geom = ST_SetStartPoint(geom, NEW.geom),
observations = 'point départ changé'
WHERE cables."lum départ" = OLD."numéro";
UPDATE cables SET
geom = ST_SetEndPoint(geom, NEW.geom),
observations = 'point final changé'
WHERE cables."lum arrivée" = OLD."numéro";
END;