Fixed #27385 -- Fixed QuerySet.bulk_create() on PostgreSQL when the number of objects is a multiple plus one of batch_size.

1 files changed, 2 insertions, 2 deletions

diff --git a/django/db/models/query.py b/django/db/models/query.py
index ee59103017..aedce13be4 100644
--- a/django/db/models/query.py
+++ b/django/db/models/query.py
@@ -1052,9 +1052,9 @@ class QuerySet(object):
         for item in [objs[i:i + batch_size] for i in range(0, len(objs), batch_size)]:
             if connections[self.db].features.can_return_ids_from_bulk_insert:
                 inserted_id = self._insert(item, fields=fields, using=self.db, return_id=True)
-                if len(objs) > 1:
+                if isinstance(inserted_id, list):
                     inserted_ids.extend(inserted_id)
-                if len(objs) == 1:
+                else:
                     inserted_ids.append(inserted_id)
             else:
                 self._insert(item, fields=fields, using=self.db)