# Hotfix #480

* (potentially) fixes a bug occuring on non multipolygon geometries processed in an api call
* simplifies casting into multipolygon
* simplifies casting into rlp srid (epsg:25832)

api/tests/v1/update/test_api_update.py

@@ -12,7 +12,7 @@ from django.contrib.gis import geos
 from django.urls import reverse
 
 from api.tests.v1.share.test_api_sharing import BaseAPIV1TestCase
-from konova.sub_settings.lanis_settings import DEFAULT_SRID_RLP
+from konova.models import Geometry
 
 
 class APIV1UpdateTestCase(BaseAPIV1TestCase):
@@ -64,7 +64,7 @@ class APIV1UpdateTestCase(BaseAPIV1TestCase):
 
         put_props = put_body["properties"]
         put_geom = geos.fromstr(json.dumps(put_body))
-        put_geom.transform(DEFAULT_SRID_RLP)
+        put_geom = Geometry.cast_to_rlp_srid(put_geom)
         self.assertEqual(put_geom, self.intervention.geometry.geom)
         self.assertEqual(put_props["title"], self.intervention.title)
         self.assertNotEqual(modified_on, self.intervention.modified)
@@ -94,7 +94,7 @@ class APIV1UpdateTestCase(BaseAPIV1TestCase):
 
         put_props = put_body["properties"]
         put_geom = geos.fromstr(json.dumps(put_body))
-        put_geom.transform(DEFAULT_SRID_RLP)
+        put_geom = Geometry.cast_to_rlp_srid(put_geom)
         self.assertEqual(put_geom, self.compensation.geometry.geom)
         self.assertEqual(put_props["title"], self.compensation.title)
         self.assertNotEqual(modified_on, self.compensation.modified)
@@ -124,7 +124,7 @@ class APIV1UpdateTestCase(BaseAPIV1TestCase):
 
         put_props = put_body["properties"]
         put_geom = geos.fromstr(json.dumps(put_body))
-        put_geom.transform(DEFAULT_SRID_RLP)
+        put_geom = Geometry.cast_to_rlp_srid(put_geom)
         self.assertEqual(put_geom, self.eco_account.geometry.geom)
         self.assertEqual(put_props["title"], self.eco_account.title)
         self.assertNotEqual(modified_on, self.eco_account.modified)
@@ -156,7 +156,7 @@ class APIV1UpdateTestCase(BaseAPIV1TestCase):
 
         put_props = put_body["properties"]
         put_geom = geos.fromstr(json.dumps(put_body))
-        put_geom.transform(DEFAULT_SRID_RLP)
+        put_geom = Geometry.cast_to_rlp_srid(put_geom)
         self.assertEqual(put_geom, self.ema.geometry.geom)
         self.assertEqual(put_props["title"], self.ema.title)
         self.assertNotEqual(modified_on, self.ema.modified)

api/utils/serializer/serializer.py

@@ -13,7 +13,7 @@ from django.contrib.gis.geos import GEOSGeometry
 from django.core.paginator import Paginator
 from django.db.models import Q
 
-from konova.sub_settings.lanis_settings import DEFAULT_SRID_RLP
+from konova.models import Geometry
 from konova.utils.message_templates import DATA_UNSHARED
 
 
@@ -145,8 +145,8 @@ class AbstractModelAPISerializer:
         if isinstance(geojson, dict):
             geojson = json.dumps(geojson)
         geometry = geos.fromstr(geojson)
-        if geometry.srid != DEFAULT_SRID_RLP:
+        geometry = Geometry.cast_to_rlp_srid(geometry)
-            geometry.transform(DEFAULT_SRID_RLP)
+        geometry = Geometry.cast_to_multipolygon(geometry)
         return geometry
 
     def _get_obj_from_db(self, id, user):

konova/forms/geometry_form.py

@@ -117,8 +117,7 @@ class SimpleGeomForm(BaseForm):
             form_geom = form_geom.union(feature)
 
         # Make sure to convert into a MultiPolygon. Relevant if a single Polygon is provided.
-        if form_geom.geom_type != "MultiPolygon":
+        form_geom = Geometry.cast_to_multipolygon(form_geom)
-            form_geom = MultiPolygon(form_geom, srid=DEFAULT_SRID_RLP)
 
         # Write unioned Multipolygon into cleaned data
         if self.cleaned_data is None:

konova/models/geometry.py

@@ -11,6 +11,7 @@ from django.contrib.gis.db.models import MultiPolygonField
 from django.core.exceptions import ObjectDoesNotExist, MultipleObjectsReturned
 from django.db import models, transaction
 from django.utils import timezone
+from django.contrib.gis.geos import MultiPolygon
 
 from konova.models import BaseResource, UuidModel
 from konova.sub_settings.lanis_settings import DEFAULT_SRID_RLP
@@ -383,6 +384,36 @@ class Geometry(BaseResource):
 
         return complexity_factor
 
+    @staticmethod
+    def cast_to_multipolygon(input_geom):
+        """ If input_geom is not a MultiPolygon, cast to MultiPolygon
+
+        Args:
+            input_geom ():
+
+        Returns:
+            output_geom
+        """
+        output_geom = input_geom
+        if input_geom.geom_type != "MultiPolygon":
+            output_geom = MultiPolygon(input_geom, srid=DEFAULT_SRID_RLP)
+        return output_geom
+
+    @staticmethod
+    def cast_to_rlp_srid(input_geom):
+        """ If input_geom is not of RLP SRID (25832), cast to RLP SRID
+
+        Args:
+            input_geom ():
+
+        Returns:
+            output_geom
+        """
+        output_geom = input_geom
+        if output_geom.srid != DEFAULT_SRID_RLP:
+            output_geom.transform(DEFAULT_SRID_RLP)
+        return output_geom
+
 
 class GeometryConflict(UuidModel):
     """