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* Tests fail when a request writes outside request.ctx.db.write()
A request's transaction begins deferred. A write in it after a read fails
instantly ("database is locked") when another connection wrote in between,
and a write left for the response middleware's commit can be lost after the
response was sent. #846-#853 and #863 moved handlers' writes into
request.ctx.db.write(); this keeps it that way.
Under pytest, a listener records every INSERT/UPDATE/DELETE/REPLACE made
while a request runs (or in a task it started) outside RequestDB.write()
or get_db_session(commit=True), and the autouse no_deferred_request_writes
fixture fails the test. allow_deferred_request_writes opts a test out.
The test-only response listener now runs switches outside the request,
as production's perpetual process does.
It found three more:
- DELETE /api/zim/<ids> deleted the .zim file, returned 204, then lost the
row's delete when the middleware's commit failed under contention. It
now writes in request.ctx.db.write().
- Viewing a file recorded the view in a background task on the request's
Session, after the request ended. set_file_viewed opens its own write.
- tags.import_config (startup and config import) read, then wrote, in a
deferred get_db_session(). It now begins as a writer.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* Tasks don't inherit a declared write; tags import change backed out
From review of #864:
- background_task's task copied its creator's Context, including
_write_intent when started inside get_db_session(commit=True) or
RequestDB.write(), so the guard ignored the task's own writes for its
lifetime. The task now starts with no declared write. That exposes
fetch_channel_source_id (started by the channels config import): it read
the Channel, asked the remote site for its source_id, then committed in
the same deferred transaction. It now reads, fetches with no
transaction open, then writes in a short get_db_session(commit=True).
- tags.import_config: commit=True held the write lock through its directory
walk, and its exit commit saved changes the need_commit gate used to
drop. Reverted to master; splitting its reads from a short write is its
own change. The two tests that run it through a request are marked
allow_deferred_request_writes until then.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
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|---|---|---|
| .. | ||
| __init__.py | ||
| test_api.py | ||
| test_lib.py | ||
| test_read_config_value.py | ||
| test_restart_kiwix.py | ||
| test_start_kiwix_serve.py | ||
| test_zim_downloaders.py | ||
| test_zim_modeler_loop.py | ||