following [this improvement],
: http://oslandia.com/en/2017/10/07/refresh-your-maps-from-postgresql/ and the video inside the link,
I am trying to refresh automatically a layer.
I select the option in the render tab in the properties, but did not use any message for now.
I insert a new polygon in my postgres database.
Then I use the psql command
NOTIFY qgis ;
Nothing happens in Qgis.
The question is why the canevas does not refresh despite the notify executed from the psql shell.
Qgis 2.99 4a2da5006b