PostgreSQL Migration Patterns for TypeORM
Ship database changes in production without downtime or data loss. Learn the schema migration patterns that prevent cascade failures, data corruption, and multi-tenant conflicts, the decisions most developers get wrong.
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What's Inside
- Core Migration Patterns: Initial Setup, Versioning, and Rollbacks
- Relationship Management: One-to-Many, Many-to-Many, and Soft Deletes
- Performance Optimization: Indexing Strategies and Query Analysis
- Multi-Tenancy Implementation with Row-Level Security
- CI/CD Integration: GitHub Actions and Migrations in Production
From Core Migration Patterns section: "Your TypeORM migration strategy determines whether you ship changes safely or spend 3am debugging production failures. Start by configuring TypeORM's migration system with explicit versioning that tracks every schema change. Generate your first migration with `typeorm migration:generate -n InitialSchema`. This creates a timestamped file TypeORM uses to track execution order. Name migrations descriptively: `1702000001000-AddUsersTable.ts`, not `migration-v1.ts`. Set the migrations folder to `src/migrations` and enable `synchronize: false`, this is critical. Synchronization bypasses your migration system and destroys production safety."
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