#49 Extends sanitize db command

* extends sanitize db command to remove unrelated parcels and district from the database
* fixes bug where single parcel wfs match would lead to unexpected behaviour
* adds admin interface for parcels and districts
* adds updating of parcels in case of SimpleGeomForm saving

konova/management/commands/sanitize_db.py

@@ -9,7 +9,7 @@ from compensation.models import CompensationState, Compensation, EcoAccount, Com
 from ema.models import Ema
 from intervention.models import Intervention
 from konova.management.commands.setup import BaseKonovaCommand
-from konova.models import Deadline, Geometry
+from konova.models import Deadline, Geometry, Parcel, District
 from user.models import UserActionLogEntry
 
 
@@ -23,6 +23,7 @@ class Command(BaseKonovaCommand):
             self.sanitize_actions()
             self.sanitize_deadlines()
             self.sanitize_geometries()
+            self.sanitize_parcels_and_districts()
         except KeyboardInterrupt:
             self._break_line()
             exit(-1)
@@ -266,3 +267,34 @@ class Command(BaseKonovaCommand):
             self._write_success("No unused states found.")
         self._break_line()
 
+    def sanitize_parcels_and_districts(self):
+        """ Removes unattached parcels and districts
+
+        Returns:
+
+        """
+        self._write_warning("=== Sanitize parcels and districts ===")
+        unrelated_parcels = Parcel.objects.filter(
+            geometries=None,
+        )
+        num_unrelated_parcels = unrelated_parcels.count()
+        if num_unrelated_parcels > 0:
+            self._write_error(f"Found {num_unrelated_parcels} unrelated parcel entries. Delete now...")
+            unrelated_parcels.delete()
+            self._write_success("Unrelated parcels deleted.")
+        else:
+            self._write_success("No unrelated parcels found.")
+
+        unrelated_districts = District.objects.filter(
+            parcels=None,
+        )
+        num_unrelated_districts = unrelated_districts.count()
+        if num_unrelated_districts > 0:
+            self._write_error(f"Found {num_unrelated_districts} unrelated district entries. Delete now...")
+            unrelated_districts.delete()
+            self._write_success("Unrelated districts deleted.")
+        else:
+            self._write_success("No unrelated districts found.")
+
+        self._break_line()
+