Fix import

Author: aclark4life

django_mongodb/query.py

@@ -1,7 +1,7 @@
 from functools import reduce, wraps
 from operator import add as add_operator
 
-from django.core.exceptions import EmptyResultSet, FullResultSet
+from django.core.exceptions import EmptyResultSet, FullResultSet, FieldDoesNotExist
 from django.db import DatabaseError, IntegrityError, NotSupportedError, connections
 from django.db.models import QuerySet
 from django.db.models.expressions import Case, Col, When
@@ -382,7 +382,7 @@ def __iter__(self):
             ) = self.queryset.resolve_model_init_order()
             model_cls = self.queryset.model
             if model_cls._meta.pk.attname not in model_init_names:
-                raise exceptions.FieldDoesNotExist(
+                raise FieldDoesNotExist(
                     "Raw query must include the primary key"
                 )
             fields = [self.queryset.model_fields.get(c) for c in self.queryset.columns]