Question 1

How to set up GORM with PostgreSQL?

Accepted Answer

GORM supports PostgreSQL via the appropriate driver. Use gorm.Open with the PostgreSQL DSN, and configure settings like SSL mode. Check the gorm.io guides for specific examples and connection details.

Question 2

GORM or sqlx: which is better for Go database access?

Accepted Answer

GORM is a full ORM ideal for rapid development with associations and migrations, while sqlx is a lightweight extension to database/sql for more SQL control. Choose GORM for abstraction and features, sqlx for performance and simplicity.

Question 3

How to optimize slow queries in GORM?

Accepted Answer

Use Preload or Joins to avoid N+1 queries, enable query logging to inspect SQL, and consider raw SQL for complex operations. The plugin system also allows integration with monitoring tools for performance tuning.

Question 4

Does GORM support automatic schema migrations?

Accepted Answer

Yes, GORM provides Auto Migrate to sync database schema with Go structs. For production, you might need manual migrations using the Migrator interface or external tools for version control.

Question 5

What are common pitfalls when using GORM associations?

Accepted Answer

Issues include unintentional lazy loading leading to performance hits, and polymorphism complexity. Always use Preload for eager loading and test association setups thoroughly to avoid data integrity problems.

Question 6

Is GORM suitable for high-concurrency applications?

Accepted Answer

GORM can handle concurrency with connection pooling and transaction management, but the ORM overhead might be a bottleneck. Optimize with batch operations and consider raw SQL for critical paths.

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