Two integration-test failures uncovered after the initial commit:
1) GetTilesByRegionAsync outer ORDER BY referenced 'updated_at' but
the inner DISTINCT ON subquery aliased it to 'UpdatedAt' (Postgres
folds to 'updatedat'). DISTINCT ON already guarantees one row per
(latitude, longitude, ...) so the third tiebreak was unreachable;
removed it.
2) Dapper 2.1.35 silently bypasses SqlMapper.TypeHandler<T> for enum
types during read deserialization (Dapper issue #259). The
TileSourceTypeHandler worked for writes but reads fell through to
Enum.TryParse, which cannot map 'google_maps' to GoogleMaps.
Pivoted: TileEntity.Source is now a string (the wire value).
TileSource enum stays as the public producer surface in
Common.Enums; TileSourceConverter (Common.Enums) provides
ToWireValue / FromWireValue / IsValidWireValue at the boundary.
TileSourceTypeHandler deleted; registration removed from
DapperEnumTypeHandlers.RegisterAll.
tile-storage.md Inv-5 amended to document the storage choice.
_docs/LESSONS.md L-001 records the Dapper bypass for future cycles.
Full suite passes (213 unit + integration suite incl. AZ-484
AC-1..AC-5, security SEC-01..SEC-04, AZ-356/362/357).
Co-authored-by: Cursor <cursoragent@cursor.com>
Add per-source tile rows to support multi-provider imagery (Google
Maps + future UAV). Migration 013 (transactional) introduces
source/captured_at columns, backfills existing rows to
(source='google_maps', captured_at=created_at), and replaces the
4-column unique index with a 5-column index that includes source.
TileRepository:
- ColumnList includes source + captured_at
- GetByTileCoordinatesAsync returns most-recent row across sources
(ORDER BY captured_at DESC, updated_at DESC, id DESC)
- GetTilesByRegionAsync uses DISTINCT ON to pick the most-recent
tile per cell, restoring caller-facing row order
- Insert/Update upsert on the new 5-column conflict key
TileSource enum lives in Common.Enums. Snake_case wire format
(google_maps, uav) is enforced by a focused TileSourceTypeHandler
because the generic ToLowerInvariant pattern would emit
"googlemaps", violating contract v1.0.0.
TileService stamps Source=GoogleMaps + CapturedAt=UtcNow on every
new tile. Tile-storage contract is now frozen at v1.0.0.
AC coverage 7/7. New unit + integration tests cover all ACs;
existing 200 unit + 5 smoke tests preserved.
Co-authored-by: Cursor <cursoragent@cursor.com>
AZ-357 — eliminate year-based tile cache expiry (LF-1):
- Migration 012: drop 5-col unique index, dedupe by (lat,lon,zoom,
size) keeping max(updated_at), add new 4-col unique index, make
version column nullable + drop default. Column itself preserved
per coderule (column drops require explicit confirmation; tracked
in AZ-373 / C20).
- TileEntity.Version, TileMetadata.Version, DownloadTileResponse.
Version: int -> int? (HTTP shape preserved; field still in JSON).
- TileService.DownloadAndStoreTilesAsync: drop currentVersion year
computation and the .Where(t => t.Version == currentVersion)
cache filter. BuildTileEntity: drop year arg; write Version=null.
- TileRepository: ON CONFLICT now 4-col; lookup queries
ORDER BY updated_at DESC instead of version DESC.
- Tests: replace inverted BT02b with positive AZ357_AC1
(prior-year cached tile is reused). Add BuildTileEntity_
DoesNotPopulateVersion_AZ357 to enforce the no-write contract.
- 69 unit + 5 smoke + 3 stub-contract integration tests pass.
Cumulative code review (batches 7-9, 7 tasks): VERDICT=PASS.
Report at _docs/03_implementation/reviews/batch_09_review.md.
Zero Critical/High/Medium/Low findings. Architecture baseline
remains clean.
Co-authored-by: Cursor <cursoragent@cursor.com>
Oleksandr Bezdieniezhnykh