fix Polygon initialization

Author: timgraham

django_mongodb_backend_gis/features.py

@@ -29,9 +29,6 @@ def django_test_expected_failures(self):
                 "gis_tests.geoapp.tests.GeoModelTest.test_gis_query_as_string",
                 # No lookups are supported (yet?)
                 "gis_tests.geoapp.tests.GeoLookupTest.test_gis_lookups_with_complex_expressions",
-                # LinearRing requires at least 4 points, got 1.
-                "gis_tests.geoapp.tests.GeoLookupTest.test_null_geometries",
-                "gis_tests.geoapp.tests.GeoModelTest.test_geometryfield",
                 # Trying to remove spatial index fails:
                 # "index not found with name [gis_neighborhood_geom_id]"
                 "gis_tests.gis_migrations.test_operations.OperationTests.test_alter_field_remove_spatial_index",

django_mongodb_backend_gis/operations.py

@@ -74,7 +74,12 @@ def converter(value, expression, connection):  # noqa: ARG001
             geom_class = getattr(geos, value["type"])
             if geom_class.__name__ == "GeometryCollection":
                 return geom_class(
-                    [getattr(geos, v["type"])(v["coordinates"]) for v in value["geometries"]],
+                    [
+                        getattr(geos, v["type"])(
+                            *v["coordinates"] if v["type"] == "Polygon" else v["coordinates"]
+                        )
+                        for v in value["geometries"]
+                    ],
                     srid=4326,
                 )
             if issubclass(geom_class, geos.GeometryCollection):
@@ -88,6 +93,8 @@ def converter(value, expression, connection):  # noqa: ARG001
                     ],
                     srid=4326,
                 )
+            if geom_class.__name__ == "Polygon":
+                return geom_class(*value["coordinates"], srid=4326)
             return geom_class(value["coordinates"], srid=4326)
 
         return converter