ADd supports_dwithin_distance_expr=False and better subquery error

Author: NoahStapp

django_mongodb_backend/gis/features.py

@@ -6,6 +6,7 @@ class GISFeatures(BaseSpatialFeatures):
     has_spatialrefsys_table = False
     supports_distance_geodetic = False
     supports_transform = False
+    supports_dwithin_distance_expr = False
 
     @cached_property
     def django_test_expected_failures(self):
@@ -50,9 +51,6 @@ def django_test_skips(self):
                     # Error: Index already exists with a different name
                     "gis_tests.geoapp.test_indexes.SchemaIndexesTests.test_index_name",
                 },
-                "Cannot use a non-Point geometry with distance lookups.": {
-                    "gis_tests.distapp.tests.DistanceTest.test_dwithin_with_expression_rhs"
-                },
                 "Subqueries not supported.": {
                     "gis_tests.geoapp.tests.GeoLookupTest.test_subquery_annotation",
                     "gis_tests.geoapp.tests.GeoQuerySetTest.test_within_subquery",

django_mongodb_backend/gis/lookups.py

@@ -9,6 +9,8 @@ def gis_lookup(self, compiler, connection, as_expr=False):
         raise NotSupportedError("MongoDB does not support GIS lookups as expressions.")
     lhs_mql = process_lhs(self, compiler, connection, as_expr=as_expr)
     rhs_mql = process_rhs(self, compiler, connection, as_expr=as_expr)
+    if "subquery" in rhs_mql or "subquery" in lhs_mql:
+        raise NotSupportedError("MongoDB does not support GIS lookups with subqueries.")
     try:
         rhs_op = self.get_rhs_op(connection, rhs_mql)
     except KeyError as e: