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satellite-provider/_docs/02_document/modules/dataaccess_migrator.md
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Oleksandr Bezdieniezhnykh b0fffa6d42 [AZ-284] Autodev baseline + testability refactor
Phase A baseline outputs from /autodev (Steps 1-5):
- Problem & solution docs (_docs/00_problem, _docs/01_solution)
- Codebase documentation (_docs/02_document) incl. architecture,
  module-layout, glossary, system-flows, baseline compliance scan
- Test specs (blackbox, performance, resilience, security, resource,
  traceability matrix)
- Test task decomposition (_docs/02_tasks/todo): AZ-285..AZ-290
- Testability refactor (_docs/04_refactoring/01-testability-refactoring):
  - TC-01 Move DownloadedTileInfoV2 + new ExistingTileInfo to Common.DTO
  - TC-02 Replace dead ISatelliteDownloader API with real signatures
  - TC-03 GoogleMapsDownloaderV2 implements ISatelliteDownloader
  - TC-04 TileService depends on ISatelliteDownloader (mockable)
  - TC-05 DI + endpoints use ISatelliteDownloader
- Test runner scripts (scripts/run-tests.sh, run-performance-tests.sh)
- Autodev state pointer (_docs/_autodev_state.md)

Prepares the codebase for AZ-285..AZ-290 unit/integration test work.

Co-authored-by: Cursor <cursoragent@cursor.com>
2026-05-10 04:44:08 +03:00

1.7 KiB

Module: DataAccess/DatabaseMigrator

Purpose

Runs DbUp-based SQL migrations against PostgreSQL on application startup. Ensures the database schema is up to date before the API begins serving requests.

Public Interface

DatabaseMigrator

  • Constructor: DatabaseMigrator(string connectionString, ILogger<DatabaseMigrator>? logger)
  • RunMigrations() → bool: creates the database if missing (EnsureDatabase.For.PostgresqlDatabase), then runs all embedded SQL scripts matching .Migrations. from the DataAccess assembly. Returns true on success.

Internal Logic

  • Uses DbUp.DeployChanges fluent API targeting PostgreSQL
  • Scripts are embedded resources filtered by path containing .Migrations.
  • Logs to console via DbUp's built-in LogToConsole()
  • On failure, logs the error and returns false

Dependencies

  • NuGet: dbup-postgresql (6.0.3)
  • Microsoft.Extensions.Logging
  • Embedded SQL resources from SatelliteProvider.DataAccess/Migrations/

Consumers

  • Program.cs — instantiated directly (not via DI) and called during startup. If migration fails, the application throws and does not start.

Migrations (11 scripts)

  1. 001_CreateTilesTable.sql
  2. 002_CreateRegionsTable.sql
  3. 003_CreateIndexes.sql
  4. 004_AddVersionColumn.sql
  5. 005_CreateRoutesTables.sql
  6. 006_AddStitchTilesToRegions.sql
  7. 007_AddRouteMapFields.sql
  8. 008_AddGeofenceFlagToRouteRegions.sql
  9. 009_AddGeofencePolygonIndex.sql
  10. 010_AddTilesZipToRoutes.sql
  11. 011_AddTileCoordinates.sql

Configuration

Receives connection string directly as constructor parameter.

External Integrations

PostgreSQL — DDL operations via DbUp.

Security

None directly, but controls schema evolution.

Tests

No dedicated tests.