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NestJS Enterprise Backend APIs · Lesson

Custom TypeORM Repositories

Create custom repositories to encapsulate complex database queries and improve code organization and reusability.

Beyond Basic CRUD

TypeORM's default Repository offers basic operations like save, find, and delete. These are great for simple tasks.

However, real-world applications often need more complex queries or domain-specific data retrieval logic.

Encapsulating Complex Queries

Without custom repositories, complex database queries might end up directly in your service layer. This can make services bloated and harder to maintain.

  • Cleaner Services: Services focus on business logic, not database specifics.
  • Reusability: Complex queries can be reused across different parts of your application.
  • Testability: Easier to test database interactions in isolation.

All lessons in this course

  1. Custom TypeORM Repositories
  2. Transactions and Migrations
  3. Database Seeding and Testing
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