JPA unique constraint validation

Question

How to validate Multiple column unique constraint in JPA entity. Is there any Hibernate validator for this purpose. I have added @UniqueConstraint annotation. But it is not doing any validation.And I also want to customize the error message.

Answer 1

The @UniqueConstraint is not related to hibernate-validator. It cannot be handled by java-only validation, it needs a trip to the database.

It tells hibernate that the database has a unique constraint. If the database does not have a unique constraint, I think the insert should pass.