What's the difference between PUT and PATCH?

PUT implies replacing the entire object (if they don't send an 'age', age becomes null). PATCH implies a partial update (if they don't send an 'age', keep the old age). In FastAPI, you handle this by making the fields in your `UserUpdate` Pydantic model optional.

Can I delete multiple items at once?

Yes, but not with `session.delete(obj)`. For bulk deletions, you would construct a raw SQL statement using `delete(User).where(User.age < 18)` and execute it. Be very careful with bulk deletes!

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Full CRUD Lifecycle

Master the complete CRUD lifecycle using SQLModel and FastAPI. Learn how to fetch single items efficiently, handle 404 errors gracefully, execute PUT updates safely, and securely delete records from the database.

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