![]() Entity data class Person( GeneratedValue(generator UuidGenerator.NAME) GenericGenerator( name UuidGenerator.NAME, strategy UuidGenerator.STRATEGY ) Id val id: UUID ) I hope you find this tutorial useful. must be annotated with the javax.persistence. With the new UuidGenerator class in place, we can now annotate our entity class accordingly and start using the generator. Using uuid-char instructs Hibernate to store the UUID as a String, instead of the binary value. Let's review what the approach from above already takes care of: This annotation defines the Hibernate type mapping. I am trying to use a UUID as a primary key with Hibernate, and let PostgreSQL or Hibernate automatically generate those IDs. Reviewing the entity requirementsĪs depicted earlier, we have a few requirements for entities that need to be considered. Both classes extend AbstractJpaPersistable and therefore rely on an auto-generated id of type Long. ![]() We can see two rather simple entities: A Person which has an associated Address. Val name: =, orphanRemoval = true, fetch = FetchType.EAGER) Now we can create our entities based on that class: Person( To mark an id property as generated, use the GeneratedValue annotation. The equals and hashCode look like discussed earlier. Identifier generator Hibernate can generate and populate identifier values for. ![]() The class AbstractJpaPersistable is pretty straightforward: It defines a generic nullable property, which is going to be auto-generated by Hibernate. By default Hibernate maps UUID with binary format, hence to change the format we need to provide hint using the Type annotation. Hibernate generates UUID method with annotation tags: JSP learning process // Configure UUID, the JPA does not support UUID, but the method of borrowing hibernate can be implemented. Consequently, Hibernate itself generates the UUID on the client-side.
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