:fix: Force simple geometrycollection on sites

docs/changelog.rst

@@ -26,6 +26,8 @@ In preparation for HD Views developments (PR #3298)
 **Bug fixes**
 
 - Recreate cache folders if missing. (#3384)
+- Modify site's geometry before saving to avoid edition and export of shapefiles (#3399)
+
 
 2.94.0     (2022-12-12)
 -----------------------

geotrek/outdoor/models.py

@@ -2,10 +2,12 @@
 from django.conf import settings
 from django.contrib.contenttypes.models import ContentType
 from django.contrib.gis.db import models
+from django.contrib.gis.geos import GEOSGeometry, GeometryCollection
 from django.contrib.gis.measure import D
 from django.contrib.postgres.indexes import GistIndex
 from django.core.validators import MinValueValidator
 from django.db.models import Q
+from django.db import connection
 from django.utils.html import escape
 from django.utils.translation import gettext_lazy as _
 from mptt.models import MPTTModel, TreeForeignKey
@@ -299,6 +301,15 @@ def site_interventions(self):
         qs |= Q(target_id__in=topologies) & ~Q(target_type__in=not_topology_content_types)
         return Intervention.objects.existing().filter(qs).distinct('pk')
 
+    def save(self, *args, **kwargs):
+        with connection.cursor() as c:
+            c.callproc('ST_Dump', [self.geom.wkt])
+            geometries = []
+            for ids, geometry in c.fetchall():
+                geometries.append(GEOSGeometry(geometry, srid=settings.SRID))
+        self.geom = GeometryCollection(geometries, srid=settings.SRID)
+        return super().save(*args, **kwargs)
+
 
 Path.add_property('sites', lambda self: intersecting(Site, self), _("Sites"))
 Topology.add_property('sites', lambda self: intersecting(Site, self), _("Sites"))

geotrek/outdoor/tests/test_models.py

@@ -2,7 +2,7 @@
 
 from django.contrib.gis.geos import Polygon
 from django.contrib.gis.geos.collections import GeometryCollection
-from django.contrib.gis.geos.point import Point
+from django.contrib.gis.geos.point import Point, GEOSGeometry
 from django.test import TestCase, override_settings
 
 from geotrek.common.tests.factories import OrganismFactory
@@ -25,6 +25,16 @@ def test_published_children_by_lang(self):
         SiteFactory(name='child3', parent=parent, published_fr=True)
         self.assertQuerysetEqual(parent.published_children, ['<Site: child2>', '<Site: child3>'])
 
+    def test_validate_collection_geometrycollection(self):
+        site_simple = SiteFactory.create(name='site', description='LUL', geom='GEOMETRYCOLLECTION(POINT(0 0), POLYGON((1 1, 2 2, 1 2, 1 1))))')
+        self.assertEqual(site_simple.geom.wkt,
+                         GEOSGeometry('GEOMETRYCOLLECTION(POINT(0 0), POLYGON((1 1, 2 2, 1 2, 1 1)))').wkt
+                         )
+        site_complex_geom = SiteFactory.create(name='site', geom='GEOMETRYCOLLECTION(MULTIPOINT(0 0, 1 1), POLYGON((1 1, 2 2, 1 2, 1 1))))')
+        self.assertEqual(site_complex_geom.geom.wkt,
+                         GEOSGeometry('GEOMETRYCOLLECTION(POINT(0 0), POINT(1 1), POLYGON((1 1, 2 2, 1 2, 1 1)))').wkt
+                         )
+
 
 class SiteSuperTest(TestCase):
     @classmethod