Merge branch 'scenarios' of gitlab.com:pamhyr/pamhyr2 into scenarios

src/Model/SedimentLayer/SedimentLayer.py

@@ -426,30 +426,31 @@ class SedimentLayer(SQLSubModel):
             f"AND pamhyr_id NOT IN ({', '.join(map(str, loaded))}) "
         )
 
-        for row in table:
-            it = iter(row)
+        if table is not None:
+            for row in table:
+                it = iter(row)
 
-            pid = next(it)
-            deleted = (next(it) == 1)
-            name = next(it)
-            comment = next(it)
-            owner_scenario = next(it)
+                pid = next(it)
+                deleted = (next(it) == 1)
+                name = next(it)
+                comment = next(it)
+                owner_scenario = next(it)
 
-            sl = cls(
-                id=pid,
-                name=name,
-                comment=comment,
-                status=data['status'],
-                owner_scenario=owner_scenario
-            )
-            if deleted:
-                sl.set_as_deleted()
+                sl = cls(
+                    id=pid,
+                    name=name,
+                    comment=comment,
+                    status=data['status'],
+                    owner_scenario=owner_scenario
+                )
+                if deleted:
+                    sl.set_as_deleted()
 
-            data["sl"] = sl
-            sl._layers = Layer._db_load(execute, data)
+                data["sl"] = sl
+                sl._layers = Layer._db_load(execute, data)
 
-            loaded.add(pid)
-            new.append(sl)
+                loaded.add(pid)
+                new.append(sl)
 
         data["scenario"] = scenario.parent
         new += cls._db_load(execute, data)