Merge pull request MongoEngine#2677 from bagerard/improve_last_merged_fix

Improve last merged fix

Author: bagerard

docs/changelog.rst

@@ -7,6 +7,7 @@ Changelog
 Development
 ===========
 - (Fill this out as you fix issues and develop your features).
+- Turning off dereferencing for the results of distinct query. #2663
 
 Changes in 0.24.2
 =================

mongoengine/queryset/base.py

@@ -953,11 +953,12 @@ def distinct(self, field):
             field = self._fields_to_dbfields([field]).pop()
         except LookUpError:
             pass
+
+        raw_values = queryset._cursor.distinct(field)
         if not self._auto_dereference:
-            return queryset._cursor.distinct(field)
-        distinct = self._dereference(
-            queryset._cursor.distinct(field), 1, name=field, instance=self._document
-        )
+            return raw_values
+
+        distinct = self._dereference(raw_values, 1, name=field, instance=self._document)
 
         doc_field = self._document._fields.get(field.split(".", 1)[0])
         instance = None