fix #19933

jef-n · jef-n · commit 2b21a979944d · 2019-02-23T22:09:53.000+01:00
diff --git a/python/plugins/db_manager/layer_preview.py b/python/plugins/db_manager/layer_preview.py
@@ -126,10 +126,10 @@ def _loadTablePreview(self, table, limit=False):
                 self.setLayers([vl])
                 QgsProject.instance().addMapLayers([vl], False)
                 self.zoomToFullExtent()
+                self.currentLayerId = vl.id()
             else:
                 self.setLayers([])
-
-            self.currentLayerId = vl.id()
+                self.currentLayerId = None
 
             self.freeze(False)
             super().refresh()
