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GetOrAddFolder read libraryPath.LibraryFolders, a navigation collection only
eager-loaded on the local scan path (via GetLibrary). The Jellyfin remote sync
path takes its LibraryPath off the JellyfinLibrary entity, where LibraryFolders
is null, so .Filter(null) threw ArgumentNullException('source') on the first
item of every Jellyfin music-video scan — a feature that had therefore never
run in prod, CI, or locally.
Look the folder up from the DB by (LibraryPathId, Path) instead, removing the
implicit eager-load contract entirely (correct for all nine callers) and
documenting it on ILibraryRepository. null != empty is preserved so a re-scan
does not insert duplicate LibraryFolder rows. No new hot-path cost: local
scanners already query GetParentFolderId per folder just before this call.
Tests:
- LibraryRepositoryTests: GetOrAddFolder with a null LibraryFolders (the exact
remote-path shape) creates the folder, is idempotent on re-scan, and persists
a supplied ParentId.
- JellyfinMusicVideoLibraryScannerTests: an end-to-end scan of one synthetic
music video, wiring the REAL LibraryRepository/ArtistRepository/
MusicVideoRepository against in-memory SQLite (the existing MediaServer*
scanner tests mock every repo, which is why the bug escaped), asserts the scan
completes and creates Artist + MusicVideo rows with a real LibraryFolder.
Both proven non-vacuous against the reverted fix (each reproduces the issue's
ArgumentNullException). decisions.md entry added.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
docs/ — reading order
Purpose: index of docs/ so a fresh contributor/agent knows what to read and in what order.
Update this doc in the same PR that adds, removes, or retitles a doc below.
Read in this order at session start:
CLAUDE.md(repo root) — project intro: architecture, layout, dev commands, conventions.docs/contributing.md— established code patterns (CQRS/MediatR, LanguageExt, the ChicoryTV SPA, EF Core dual-provider migrations, FFmpeg pipeline, analyzers, testing). Read before any non-trivial change.docs/domain-model.md— what the app IS: entity glossary, channel→playout→schedule/block concept map, where each concept is edited in the SPA.docs/api-conventions.md— checklist for adding/changing a/api/*endpoint (controllers, DTOs, error mapping, auth, OpenAPI regen, tests).docs/spa-conventions.md— playbook for adding a screen to the ChicoryTV React SPA.docs/e2e-local.md(+scripts/e2e-local.sh) — how to run a live local instance for manual or Playwright-MCP verification.docs/testing.md— testing map: what each*.Testsproject /websuite covers, golden-file nets, the timezone-independence rule, how to run subsets, the per-PR verification gate.docs/blazor-route-parity.md— historical record of the completed #91 phase (b) cutover: the Blazor Server UI is removed and every legacy route now 302-redirects to its SPA equivalent (or falls through to the catch-all →/app). Read it for the full legacy→SPA route inventory.docs/decisions.md— append-only "why" log. Check here before challenging an existing convention. Start from its Index, which links the four topic files underdocs/decisions/(large same-topic clusters) and lists the remaining in-file entries.docs/ci-cd.md— build/test/release pipeline, versioning, dependency management.
Also present in docs/:
docs/rest-api.md— REST API design doc for ersatztv#2 (goals, conventions, per-slice plan). Largely superseded day-to-day bydocs/api-conventions.md; read this for the original rationale.docs/channels.md— Channel entity field reference.docs/m3u-xmltv.md— M3U/XMLTV generation overview (ChannelPlaylist,GetChannelGuideHandler).docs/fork-strategy.md— divergence policy vs upstream ErsatzTV.docs/design-sync.md— Claude Design ↔ repo screen workflow (#92).docs/endpoint-index.md— generated REST endpoint index (method/path/operationId/summary per OpenAPI tag). Do not edit by hand; regenerated byscripts/generate-endpoint-index.py/scripts/update-openapi.sh.docs/handoffs/chicorytv-issue-queue.md— static session kickoff prompt + workflow lore. Queue state (goal, arc, what's in flight/next) lives in the pinned Gitea tracker ersatztv#237 — read that, not this file, for current state (protocol: decisions.md 2026-07-11).docs/handoffs/rest-api.md— original handoff prompt for kicking off the REST API work (#2).