docs(01-02): complete PostgreSQL and Migrations plan
Tasks completed: 3/3 - Create Quill PostgreSQL context - Create Flyway migrator service - Add /ready endpoint with database check SUMMARY: .planning/phases/01-foundation/01-02-SUMMARY.md
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Jakub Zych
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.planning/phases/01-foundation/01-02-SUMMARY.md
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.planning/phases/01-foundation/01-02-SUMMARY.md
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---
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phase: 01-foundation
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plan: 02
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subsystem: database
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tags: [quill, postgresql, hikaricp, flyway, zio, migrations]
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# Dependency graph
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requires:
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- phase: 01-01
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provides: Mill build with ZIO HTTP server and HOCON configuration
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provides:
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- Quill PostgreSQL context with compile-time SQL validation
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- Flyway migration service as ZIO effect
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- V1 migration creating summer_users table
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- /ready endpoint for database connectivity checks
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affects: [02-plugin-system, 03-user-auth, 05-cli-scaffolding]
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# Tech tracking
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tech-stack:
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added: [quill-jdbc-zio 4.8.5, flyway-core 10.21.0, flyway-database-postgresql 10.21.0, postgresql 42.7.4]
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patterns: [ZIO layers for database access, HikariCP connection pooling, SnakeCase naming strategy]
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key-files:
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created:
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- summercms/src/db/QuillContext.scala
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- summercms/src/db/Migrator.scala
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- summercms/resources/db/migration/V1__create_summer_users.sql
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modified:
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- summercms/resources/application.conf
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- summercms/src/api/HealthRoutes.scala
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- summercms/src/api/Routes.scala
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- summercms/src/Main.scala
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key-decisions:
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- "Use 'hikari' prefix for HikariCP config to avoid conflict with ZIO config 'database' prefix"
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- "Migrations run via CLI only, not auto-run on startup"
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- "summer_migrations table name instead of default flyway_schema_history"
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patterns-established:
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- "ZLayer composition: dataSourceLayer >>> quillLayer for full database access"
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- "SnakeCase naming strategy: Scala camelCase fields map to PostgreSQL snake_case columns"
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- "Liveness vs readiness probes: /health always 200, /ready checks database"
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# Metrics
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duration: 35min
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completed: 2026-02-04
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---
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# Phase 01 Plan 02: PostgreSQL and Migrations Summary
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**Quill PostgreSQL context with compile-time SQL validation, Flyway migration service, and /ready endpoint verifying database connectivity**
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## Performance
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- **Duration:** 35 min
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- **Started:** 2026-02-04T20:46:37Z
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- **Completed:** 2026-02-04T21:21:13Z
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- **Tasks:** 3
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- **Files modified:** 7
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## Accomplishments
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- Quill PostgreSQL context with HikariCP connection pooling and SnakeCase naming
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- Flyway migrator service exposing migrate/status as ZIO effects
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- V1 migration creating summer_users table with proper schema (id, email, password_hash, timestamps)
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- /ready endpoint returning 200 when database connected, 503 when not
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## Task Commits
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Each task was committed atomically:
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1. **Task 1: Create Quill PostgreSQL context** - `106e664` (feat)
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2. **Task 2: Create Flyway migrator service** - `ddb1964` (feat)
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3. **Task 3: Add /ready endpoint with database check** - `0059add` (feat)
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## Files Created/Modified
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- `summercms/src/db/QuillContext.scala` - Quill PostgreSQL context with dataSourceLayer and quillLayer
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- `summercms/src/db/Migrator.scala` - Flyway wrapper trait with migrate/status ZIO effects
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- `summercms/resources/db/migration/V1__create_summer_users.sql` - Initial schema with summer_users table
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- `summercms/resources/application.conf` - Added hikari prefix for HikariCP configuration
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- `summercms/src/api/HealthRoutes.scala` - Added /ready endpoint with database connectivity check
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- `summercms/src/api/Routes.scala` - Updated type to Routes[DataSource, Response]
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- `summercms/src/Main.scala` - Provides dataSourceLayer to server
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## Decisions Made
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- **Separate config prefixes:** Used "hikari" prefix for HikariCP/Quill config separate from "database" prefix for ZIO config. The "database" key in ZIO config would conflict with HikariCP property parsing.
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- **No auto-migration:** Migrations are NOT auto-run on startup per CONTEXT.md. Migrator service is available but must be explicitly invoked via CLI (Phase 5).
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- **summer_migrations table:** Custom Flyway table name to distinguish from potential multi-tenant scenarios.
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## Deviations from Plan
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### Auto-fixed Issues
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**1. [Rule 3 - Blocking] Config prefix conflict resolution**
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- **Found during:** Task 3 (Testing server startup)
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- **Issue:** HikariCP was failing to initialize because it saw the "database" property from ZIO config and tried to set it as a HikariConfig property
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- **Fix:** Changed Quill DataSource to read from "hikari" prefix instead of "database" prefix
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- **Files modified:** QuillContext.scala, application.conf
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- **Verification:** Server starts, /ready returns 200
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- **Committed in:** 0059add (Task 3 commit)
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**2. [Rule 3 - Blocking] Created database user and database**
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- **Found during:** Task 3 (Testing server startup)
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- **Issue:** PostgreSQL user "summercms" and database "summercms" did not exist
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- **Fix:** Created user and database via psql
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- **Files modified:** None (database-level change)
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- **Verification:** Server connects, /ready returns 200
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---
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**Total deviations:** 2 auto-fixed (2 blocking)
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**Impact on plan:** Both auto-fixes necessary for basic operation. No scope creep.
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## Issues Encountered
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- SLF4J binding warning during startup ("Failed to load class org.slf4j.impl.StaticLoggerBinder") - cosmetic only, not a functional issue. Can add slf4j-simple dependency in future if logging is needed.
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## User Setup Required
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**Database setup required.** If PostgreSQL user/database don't exist:
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```bash
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# Create database user and database
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sudo -u postgres psql -c "CREATE USER summercms WITH PASSWORD 'summercms';"
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sudo -u postgres psql -c "CREATE DATABASE summercms OWNER summercms;"
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```
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Or override via environment variables:
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- `DB_HOST` - Database host (default: localhost)
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- `DB_PORT` - Database port (default: 5432)
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- `DB_NAME` - Database name (default: summercms)
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- `DB_USER` - Database user (default: summercms)
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- `DB_PASSWORD` - Database password (default: summercms)
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## Next Phase Readiness
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- Database layer complete with compile-time SQL validation via Quill
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- Migration service ready for CLI integration (Phase 5)
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- /ready endpoint available for deployment health checks
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- Ready for Phase 2 (Plugin System) or Phase 3 (User Auth)
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---
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*Phase: 01-foundation*
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*Completed: 2026-02-04*
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