Update django_mongodb_backend/gis/lookups.py

Co-authored-by: Emanuel Lupi <emanuel.lupi91@gmail.com>

Author: NoahStapp

django_mongodb_backend/gis/lookups.py

@@ -5,7 +5,7 @@
 
 
 def gis_lookup(self, compiler, connection, as_expr=False):
-    if as_expr:
+    if as_expr or not self.can_use_path:
         raise NotSupportedError("MongoDB does not support GIS lookups in expressions.")
     lhs_mql = process_lhs(self, compiler, connection, as_expr=as_expr)
     rhs_mql = process_rhs(self, compiler, connection, as_expr=as_expr)