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ersatztv/ErsatzTV.Infrastructure/Data
timothyandClaude Opus 4.8 61bd374494
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fix(476): cascade FileNotFound from removed shows/seasons to descendants
The media-server television scanner reconciles removed items at three levels
via existing.Except(incoming), but the season and episode sweeps live inside
the per-parent loops (ScanSeasons inside the show loop, ScanEpisodes inside the
season loop). Those loops only iterate parents present in the incoming list, so
a show (or season) that is gone from the media server is never visited and its
descendants are never swept — they keep their last state. On Jellyfin/Emby that
is RemoteOnly, which PlayoutBuilder does NOT skip even with PlayoutSkipMissingItems
on, so every orphaned episode keeps getting scheduled as a guaranteed tune-in
failure (the #473 reproduction; 717 stale prod rows across 10 removed shows).

Fix: cascade the flag by parent MediaItem.Id. Two provider-agnostic repo helpers
(Season.ShowId / Episode.SeasonId are on the base tables) flag descendants and the
scanner drives them after each parent sweep — show → seasons → episodes, and
season → episodes for the show-present case. Shared abstract base fixes
Jellyfin/Plex/Emby at once; Movie/OtherVideo are flat and have no such gap.

Tests: a Scanner.Tests case asserts the scanner cascades through the (substituted)
repository (non-vacuous — fails if the cascade calls are removed), and Integration
tests exercise the real cascade SQL against the schema, proving it flags only the
targeted subtree and no-ops on empty input.

fixes #476

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-19 21:49:33 +02:00
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