quixotic/.serena/memories/postgresql_migration_complete.md

PostgreSQL Migration Completed

Changes Made

• Docker Compose: Added PostgreSQL 15 service with persistent data volume
• Database Configuration: Migrated from SQLite3 to PostgreSQL using pg library
• Package Dependencies: Updated package.json (removed sqlite3, added pg and @types/pg)
• Database Class: Converted all methods to use PostgreSQL syntax and async/await pattern

Key Configuration

• Database URL: postgresql://quixotic:quixotic123@postgres:5432/quixotic
• Container: quixotic-postgres with health checks
• Volume: postgres-data for data persistence
• Environment variables: POSTGRES_DB, POSTGRES_USER, POSTGRES_PASSWORD

Database Schema Changes

• INTEGER PRIMARY KEY → SERIAL PRIMARY KEY
• BIGINT for telegram_id (better for large Telegram IDs)
• TIMESTAMP instead of DATETIME
• PostgreSQL-style REFERENCES syntax for foreign keys
• ON CONFLICT DO UPDATE for upsert operations

Status

✅ Migration completed successfully ✅ Application starts without database errors ✅ All dependencies installed ✅ Docker containers running properly