I am using OpenLayers to connects to QGIS Server, to serve a WMS layers.
I want to filter the WMS layer according to one attribute. I have followed the documentation to do so. Everything is working fine if I use the '=' operator, like the following, for example:
FILTER=myLayerName: "myAttribute" = 1
But I need to have the criteria using the 'IN' operator, because I am filtering on multi values, like the following, for example (doesn't work)
FILTER=myLayerName: "myAttribute" IN (1, 2, 3)
Could you please advice me with the proper way to use the 'IN' operator with Integer values?