- Replace custom migration system with modern Drizzle ORM implementation
- Add drizzle-orm and drizzle-kit dependencies for type-safe database operations
- Refactor BaseService to use Drizzle client with full type safety
- Create schema definitions in /database/schema/ using Drizzle patterns
- Remove legacy migration files, queries, and migrator classes
- Add comprehensive documentation for new Drizzle-based architecture
- Maintain backward compatibility in service layer APIs
- Simplify database operations with modern ORM patterns
This migration eliminates custom SQL generation in favor of a proven,
type-safe ORM solution that provides better developer experience and
maintainability.
- Rename SessionLogEntity → SessionMessageEntity type definition
- Rename SessionLogService → SessionMessageService with all methods
- Rename API routes /logs → /messages for better REST semantics
- Update database queries and service layer naming
- Update all Swagger documentation and validation middleware
- Maintain backward compatibility in database schema
This improves code readability by using more accurate terminology
for conversational message data rather than generic "log" naming.
Refactor database to migration-only approach and add complete documentation
### Database Architecture Improvements:
- **Remove redundant schema files**: Eliminated duplicate table/index definitions
- **Single source of truth**: Migration files now exclusively define database schema
- **Simplified maintenance**: No more sync issues between schema files and migrations
### Files Removed:
- `database/schema/tables.ts` - Redundant table definitions
- `database/schema/indexes.ts` - Redundant index definitions
### Files Updated:
- `database/schema/index.ts` - Now only exports migration utilities
- `database/index.ts` - Simplified exports, removed redundant schema references
- `BaseService.ts` - Updated documentation for migration-only approach
- `migrator.ts` - Enhanced documentation and clarity
### Documentation Added:
- **`database/README.md`** - Comprehensive 400+ line guide covering:
- Architecture overview and migration-only approach
- Complete directory structure explanation
- Migration system lifecycle with diagrams
- Query organization and API reference
- Development workflow and best practices
- Troubleshooting guide and examples
### Benefits:
- ✅ Eliminated redundancy between schema and migration files
- ✅ Reduced maintenance overhead and potential sync issues
- ✅ Established single source of truth for database schema
- ✅ Added comprehensive documentation for team development
- ✅ Maintained full backward compatibility
- ✅ All tests continue to pass (1420/1420)
The database system now follows industry best practices with migrations as the sole
schema definition method, while providing complete documentation for developers.
