shapely's cascaded_union was deprecated, replace with unary_union

src/c3nav/editor/api.py

@@ -12,7 +12,7 @@ from rest_framework.generics import get_object_or_404
 from rest_framework.response import Response
 from rest_framework.viewsets import ReadOnlyModelViewSet, ViewSet
 from shapely import prepared
-from shapely.ops import cascaded_union
+from shapely.ops import unary_union
 
 from c3nav.api.utils import get_api_post_data
 from c3nav.editor.forms import ChangeSetForm, RejectForm
@@ -69,7 +69,7 @@ class EditorViewSet(EditorViewSetMixin, ViewSet):
     @staticmethod
     def _get_level_geometries(level):
         buildings = level.buildings.all()
-        buildings_geom = cascaded_union([building.geometry for building in buildings])
+        buildings_geom = unary_union([building.geometry for building in buildings])
         spaces = {space.pk: space for space in level.spaces.all()}
         holes_geom = []
         for space in spaces.values():
@@ -77,11 +77,11 @@ class EditorViewSet(EditorViewSetMixin, ViewSet):
                 space.geometry = space.geometry.difference(buildings_geom)
             columns = [column.geometry for column in space.columns.all()]
             if columns:
-                columns_geom = cascaded_union([column.geometry for column in space.columns.all()])
+                columns_geom = unary_union([column.geometry for column in space.columns.all()])
                 space.geometry = space.geometry.difference(columns_geom)
             holes = [hole.geometry for hole in space.holes.all()]
             if holes:
-                space_holes_geom = cascaded_union(holes)
+                space_holes_geom = unary_union(holes)
                 holes_geom.append(space_holes_geom.intersection(space.geometry))
                 space.geometry = space.geometry.difference(space_holes_geom)
 
@@ -89,7 +89,7 @@ class EditorViewSet(EditorViewSetMixin, ViewSet):
             building.original_geometry = building.geometry
 
         if holes_geom:
-            holes_geom = cascaded_union(holes_geom)
+            holes_geom = unary_union(holes_geom)
             holes_geom_prep = prepared.prep(holes_geom)
             for obj in buildings:
                 if holes_geom_prep.intersects(obj.geometry):
@@ -221,7 +221,7 @@ class EditorViewSet(EditorViewSetMixin, ViewSet):
             if request.user_permissions.can_access_base_mapdata:
                 doors = [door for door in level.doors.filter(Door.q_for_request(request)).all()
                          if door.geometry.intersects(space.geometry)]
-                doors_space_geom = cascaded_union([door.geometry for door in doors]+[space.geometry])
+                doors_space_geom = unary_union([door.geometry for door in doors]+[space.geometry])
 
                 levels, levels_on_top, levels_under = self._get_levels_pk(request, level.primary_level)
                 if level.on_top_of_id is not None:
@@ -251,7 +251,7 @@ class EditorViewSet(EditorViewSetMixin, ViewSet):
 
                 # deactivated for performance reasons
                 buildings = level.buildings.all()
-                # buildings_geom = cascaded_union([building.geometry for building in buildings])
+                # buildings_geom = unary_union([building.geometry for building in buildings])
                 # for other_space in other_spaces:
                 #     if other_space.outside:
                 #         other_space.geometry = other_space.geometry.difference(buildings_geom)

src/c3nav/mapdata/migrations/0003_space_outside.py

@@ -3,13 +3,13 @@
 from __future__ import unicode_literals
 
 from django.db import migrations, models
-from shapely.ops import cascaded_union
+from shapely.ops import unary_union
 
 
 def set_space_outside(apps, schema_editor):
     Section = apps.get_model('mapdata', 'Section')
     for section in Section.objects.all():
-        building_geometries = cascaded_union(tuple(building.geometry for building in section.buildings.all()))
+        building_geometries = unary_union(tuple(building.geometry for building in section.buildings.all()))
         for space in section.spaces.all():
             if space.geometry.intersection(building_geometries).area / space.geometry.area < 0.5:
                 space.outside = True

src/c3nav/mapdata/models/level.py

@@ -7,7 +7,7 @@ from django.db import models
 from django.urls import reverse
 from django.utils.functional import cached_property
 from django.utils.translation import gettext_lazy as _
-from shapely.ops import cascaded_union
+from shapely.ops import unary_union
 
 from c3nav.mapdata.models.locations import SpecificLocation
 
@@ -94,8 +94,8 @@ class Level(SpecificLocation, models.Model):
 
     @cached_property
     def bounds(self):
-        return cascaded_union(tuple(item.geometry.buffer(0)
-                                    for item in chain(self.altitudeareas.all(), self.buildings.all()))).bounds
+        return unary_union(tuple(item.geometry.buffer(0)
+                                 for item in chain(self.altitudeareas.all(), self.buildings.all()))).bounds
 
     def get_icon(self):
         return super().get_icon() or 'layers'

src/c3nav/mapdata/utils/locations.py

@@ -10,7 +10,7 @@ from django.apps import apps
 from django.db.models import Prefetch, Q
 from django.utils.functional import cached_property
 from django.utils.translation import gettext_lazy as _
-from shapely.ops import cascaded_union
+from shapely.ops import unary_union
 
 from c3nav.mapdata.grid import grid
 from c3nav.mapdata.models import Level, Location, LocationGroup, MapUpdate
@@ -137,7 +137,7 @@ def get_better_space_geometries():
     result = {}
     for space in Space.objects.prefetch_related('columns', 'holes'):
         geometry = space.geometry.difference(
-            cascaded_union(tuple(obj.geometry for obj in chain(space.columns.all(), space.holes.all())))
+            unary_union(tuple(obj.geometry for obj in chain(space.columns.all(), space.holes.all())))
         )
         if not geometry.is_empty:
             result[space.pk] = geometry