[1.9.x] Fixed #26138 -- Ensured geometry_field's geometry is always serialized

Thanks Bernd Schlapsi for the report.
Backport of 54236a2c1c from master.

1 files changed, 15 insertions, 2 deletions

diff --git a/tests/gis_tests/geoapp/test_serializers.py b/tests/gis_tests/geoapp/test_serializers.py
index 1bf3ec0acf..de104b5cda 100644
--- a/tests/gis_tests/geoapp/test_serializers.py
+++ b/tests/gis_tests/geoapp/test_serializers.py
@@ -47,8 +47,21 @@ class GeoJSONSerializerTests(TestCase):
         geodata = json.loads(geojson)
         self.assertEqual(geodata['features'][0]['geometry']['type'], 'Point')
 
-        geojson = serializers.serialize('geojson', MultiFields.objects.all(),
-            geometry_field='poly')
+        geojson = serializers.serialize(
+            'geojson',
+            MultiFields.objects.all(),
+            geometry_field='poly'
+        )
+        geodata = json.loads(geojson)
+        self.assertEqual(geodata['features'][0]['geometry']['type'], 'Polygon')
+
+        # geometry_field is considered even if not in fields (#26138).
+        geojson = serializers.serialize(
+            'geojson',
+            MultiFields.objects.all(),
+            geometry_field='poly',
+            fields=('city',)
+        )
         geodata = json.loads(geojson)
         self.assertEqual(geodata['features'][0]['geometry']['type'], 'Polygon')