* Fix: selection_data re-derives the filtered document set 5 times over
_get_selection_data_for_queryset() (powers ?include_selection_data=true on
the document list and search endpoints) computed document_count for
Correspondent/DocumentType/StoragePath/Tag/CustomField by embedding the
caller's full filtered queryset -- filters plus the permission check -- as
a subquery inside 5 separate Count(filter=Q(documents__in=queryset), ...)
calls. Each one re-evaluates that whole queryset from scratch.
Resolve the document ids once into a concrete list and reuse it across all
five annotations instead. For Tag/CustomField specifically (M2M via a
through-model table), also route through annotate_document_count_by_ids()
-- extracted from the tag/custom-field document_count fix (#13203) -- to
avoid the same Count(filter=Q(id__in=...), distinct=True)-on-an-M2M-relation
anti-pattern diagnosed there.
On a 400k-document/1,000-tag corpus, the correspondents portion alone
previously didn't finish within several minutes (killed twice while
investigating, including one run that left a zombie query still consuming
a CPU 30+ minutes later). All five queries together now complete in
~30-35s. Root-caused from a real report (paperless-ngx#13201) via a
different, already-fixed query (#13205) -- this one hasn't been reported
in the wild yet, found by auditing the same call path.
Depends on #13203 for annotate_document_count_by_ids().
Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>
* Address review feedback: drop unnecessary ordering before collecting ids
queryset passed into _get_selection_data_for_queryset() carries the
default/user-specified ordering, which is irrelevant once we're only
collecting a flat id list. Clearing it removes a pointless sort.
No measurable change in benchmarking at 400k documents -- the id-list
materialization/IN-clause cost still dominates -- but it's a free,
strictly-correct cleanup, not just noise-neutral in the other direction.
Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>
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Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>
* Fix (beta): tag/custom-field document_count scales badly with tag count
TagViewSet and CustomFieldViewSet's document_count annotation used a
per-row correlated subquery (annotate_document_count_for_related_queryset),
executed once per tag/custom-field row. Fine at a few dozen rows, but at
~1,000 tags it degrades to a full per-tag GroupAggregate over the tags M2M
table -- 6s+ in production reports, confirmed via EXPLAIN (loops=1000).
Replaced with a single, independent GROUP BY over the through table
(permission filter expressed as a plain WHERE, not an aggregate FILTER),
then injected via Case/When. Also tried a more "obvious" fix -- a plain
Count(filter=Q(id__in=permitted_ids), distinct=True) directly on the M2M
relation -- but that's worse: Postgres fails to plan the id__in check as a
semi-join once a large M2M bridge table is involved, and instead re-checks
subquery membership once per joined row.
Benchmarked against a synthetic corpus (400k documents, 1,000 tags @ ~5/doc,
matching real-world reports in discussion #13161): tag list wall-clock drops
from ~180s to ~8s for a permission-restricted user, ~21s to ~8s for a
superuser. No measurable change at typical home-instance scale (tens of
tags).
Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>
* Address review feedback: restore validation, scope aggregation to queryset
- Restore the document_count_source_field validation helper dropped during
the refactor -- misconfiguring a viewset (document_count_through set
without document_count_source_field) now fails fast with a clear error
again instead of an obscure runtime failure.
- Restrict annotate_document_count_for_related_queryset()'s through-table
aggregation to rows whose related_object_field is one of the annotated
queryset's pks. No-op for the main tag-list call site (queryset is all
tags), but avoids unnecessary work for narrower callers like the tag
descendants branch in TagViewSet.list().
Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>
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Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>
Sebastian SteinbeißerandGitHub