[3.0.x] Fixed #30854 -- Fixed QuerySet.select_related() with multiple FilteredRelations.

Backport of 6a75cea76a98c08bf2e20d787be9b14c2cd94860 from master.

1 files changed, 6 insertions, 4 deletions

diff --git a/django/db/models/sql/compiler.py b/django/db/models/sql/compiler.py
index 5da862f716..e85e73de50 100644
--- a/django/db/models/sql/compiler.py
+++ b/django/db/models/sql/compiler.py
@@ -1,6 +1,7 @@
 import collections
 import re
 import warnings
+from functools import partial
 from itertools import chain
 
 from django.core.exceptions import EmptyResultSet, FieldError
@@ -902,6 +903,10 @@ class SQLCompiler:
                     select, model._meta, alias, cur_depth + 1,
                     next, restricted)
                 get_related_klass_infos(klass_info, next_klass_infos)
+
+            def remote_setter(name, obj, from_obj):
+                setattr(from_obj, name, obj)
+
             for name in list(requested):
                 # Filtered relations work only on the topmost level.
                 if cur_depth > 1:
@@ -917,15 +922,12 @@ class SQLCompiler:
                         # Set a reverse fk object when relation is non-empty.
                         if from_obj:
                             f.remote_field.set_cached_value(from_obj, obj)
-
-                    def remote_setter(obj, from_obj):
-                        setattr(from_obj, name, obj)
                     klass_info = {
                         'model': model,
                         'field': f,
                         'reverse': True,
                         'local_setter': local_setter,
-                        'remote_setter': remote_setter,
+                        'remote_setter': partial(remote_setter, name),
                         'from_parent': from_parent,
                     }
                     related_klass_infos.append(klass_info)