actually call function from teksi#302

plugin/teksi_wastewater/teksi_wastewater_plugin.py

@@ -46,7 +46,7 @@
 from .tools.twwnetwork import TwwGraphManager
 from .utils.plugin_utils import plugin_root_path
 from .utils.translation import setup_i18n
-from .utils.tww_validity_check import tww_check_oid_prefix
+from .utils.tww_validity_check import tww_check_oid_prefix,tww_check_fk_defaults
 from .utils.twwlayermanager import TwwLayerManager, TwwLayerNotifier
 from .utils.twwlogging import TwwQgsLogHandler
 
@@ -310,25 +310,25 @@ def initGui(self):
         QgsApplication.processingRegistry().addProvider(self.processing_provider)
 
         self.network_layer_notifier.layersAdded([])
+
+        # check if database defaults are set
+        self.iface.projectRead.connect(
+            self.tww_validity_check
+        )
 
     def tww_validity_check(self):
         pg_layer = TwwLayerManager.layer("vw_tww_wastewater_structure")
-        if not pg_layer:
-            self.iface.messageBar().pushMessage(
-                "Error",
-                "Could not determine the Postgres connection information. Make sure the TWW project is loaded.",
-                level=Qgis.Critical,
-            )
-
-        pgservice = pg_layer.dataProvider().uri().service()
-        msgs = tww_check_oid_prefix(pgservice)
-        msgs.extend(tww_check_oid_prefix(pgservice))
-        for msg in msgs:
-            self.iface.messageBar().pushMessage(
-                "Error",
-                msg,
-                level=Qgis.Critical,
-            )
+        if pg_layer:
+            pgservice = pg_layer.dataProvider().uri().service()
+            msgs = tww_check_oid_prefix(pgservice)
+            msgs.extend(tww_check_oid_prefix(pgservice))
+            msgs.extend(tww_check_fk_defaults(pgservice))
+            for msg in msgs:
+                self.iface.messageBar().pushMessage(
+                    "Error",
+                    msg,
+                    level=Qgis.Critical,
+                )
 
     def unload(self):
         """