[1.8.x] Fixed #24719 -- Restored the ability to use interators as queryset related object filters.

Backport of 9c2d8cde77ee6edd407e92f93eacd4624290394f from master

1 files changed, 4 insertions, 1 deletions

diff --git a/django/db/models/sql/query.py b/django/db/models/sql/query.py
index 7ba94f205b..387b91a60b 100644
--- a/django/db/models/sql/query.py
+++ b/django/db/models/sql/query.py
@@ -8,7 +8,7 @@ all about the internals of models in order to get the information it needs.
 """
 import copy
 import warnings
-from collections import Mapping, OrderedDict
+from collections import Iterator, Mapping, OrderedDict
 from itertools import chain, count, product
 from string import ascii_uppercase
 
@@ -1167,6 +1167,9 @@ class Query(object):
             field, sources, opts, join_list, path = self.setup_joins(
                 parts, opts, alias, can_reuse=can_reuse, allow_many=allow_many)
 
+            # Prevent iterator from being consumed by check_related_objects()
+            if isinstance(value, Iterator):
+                value = list(value)
             self.check_related_objects(field, value, opts)
 
             # split_exclude() needs to know which joins were generated for the