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siftlode/backend/alembic/versions/0073_saved_view_source.py
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peter b7a4eaff8d fix(plex): resolve deep-review findings on the filter-bar overhaul
Self-review of the branch diff (feature/plex-filter-bar-overhaul) against main:

- Surprise rail query key omitted `lang` while the backend /surprise now filters
  against the language-specific genre column → a HU/EN switch under an active genre
  filter left the rail stale. Key it by scope+lang+filters, matching plexDiscover.
- Chip-removing a collection left its entry in `collectionTitles` (hashed into the
  plex query keys), splitting the cache from the pristine no-collection state and
  growing the titles map unboundedly. Prune the title on remove, like CollectionPicker.
- The saved-views default-mirror effect gained `cfg` in its deps (re-memoized on every
  live filter edit) → a synchronous localStorage write per keystroke. Depend on the
  module-stable mirror fn instead.
- Collections-browse search input had no accessible name (placeholder only). Add
  aria-label + type="search".
- Extract the tile hue-hash + gradient duplicated between PlexDiscover and
  plexBrowseLists into a shared lib/hueTile so the two surfaces can't drift.
- Document migration 0073 downgrade() as lossy and de-dup non-feed rows before
  recreating the narrow (user_id, name) constraint (verified by the drift test).
- Add unit tests for coercePlexFilters (legacy single-collection migration) and
  plexFiltersSignature (order-independence, title-ignoring).

Gate: tsc/lint/knip/prettier clean, 410 vitest; backend ruff + migration drift +
saved-views tests green.
2026-08-23 01:39:29 +02:00

40 lines
1.8 KiB
Python

"""saved_views.source (ask 4: per-module saved views)
Saved "smart views" were feed-only; the Plex module now has them too. Add a `source` discriminator
(default "feed" so every existing row stays a feed view) and widen the per-user unique name constraint
to (user_id, source, name) so a feed view and a Plex view can share a name. `source` is NOT NULL with a
server_default, so the ADD is a metadata-only rewrite-free change; the constraint swap is quick on a
small per-user table.
"""
from typing import Sequence, Union
import sqlalchemy as sa
from alembic import op
revision: str = "0073_saved_view_source"
down_revision: Union[str, None] = "0072_plex_person_bio"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None
def upgrade() -> None:
op.add_column(
"saved_views",
sa.Column("source", sa.String(length=16), nullable=False, server_default="feed"),
)
op.drop_constraint("uq_user_saved_view", "saved_views", type_="unique")
op.create_unique_constraint(
"uq_user_source_saved_view", "saved_views", ["user_id", "source", "name"]
)
def downgrade() -> None:
# LOSSY / effectively forward-only: upgrade lets a user hold a feed view and a plex view of the same
# name, so re-creating the narrow (user_id, name) constraint can raise IntegrityError on such a pair.
# De-dup by dropping the non-feed rows first (they can't exist in the pre-0073 schema anyway) so the
# narrow constraint re-applies cleanly for the drift test's downgrade→re-upgrade cycle.
op.execute("DELETE FROM saved_views WHERE source <> 'feed'")
op.drop_constraint("uq_user_source_saved_view", "saved_views", type_="unique")
op.create_unique_constraint("uq_user_saved_view", "saved_views", ["user_id", "name"])
op.drop_column("saved_views", "source")