#34227: multi level FilteredRelation with select_related may set wrong related
object
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Reporter: zhu | Owner: nobody
Type: Uncategorized | Status: new
Component: Uncategorized | Version: 4.1
Severity: Normal | Resolution:
Keywords: | Triage Stage: Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by zhu):
Seems this bug can be fixed by:
{{{
M django/db/models/sql/compiler.py
@@ -1270,6 +1270,9 @@ class SQLCompiler:
if from_obj:
final_field.remote_field.set_cached_value(from_obj,
obj)
+ def no_local_setter(obj, from_obj):
+ pass
+
def remote_setter(name, obj, from_obj):
setattr(from_obj, name, obj)
@@ -1291,7 +1294,7 @@ class SQLCompiler:
"model": model,
"field": final_field,
"reverse": True,
- "local_setter": partial(local_setter,
final_field),
+ "local_setter": partial(local_setter,
final_field) if len(joins) <= 2 else no_local_setter,
"remote_setter": partial(remote_setter, name),
"from_parent": from_parent,
}
}}}
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Ticket URL: <https://code.djangoproject.com/ticket/34227#comment:1>
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