CODEWITHSUNDEEP
hibernatespring-bootspring-data-jpa
Manuelarte
Manuelarte

Reputation: 1820

PersistenceObjectException in child entity with @MapsId annotation in a test

I have the following two entities, Parent and Child. Parent does not have a field child.

The child entity is defined like this:

@Entity
@Table(name = "child")
@Audited
public class Child extends BaseEntity {

    @OneToOne
    @JoinColumn(name = "application_id")
    @MapsId
    @NotAudited
    private Parent parent;
....

I am writing a test, and I want to create a parent entity and a child entity, and save both. So I do the following:

parentRepository.save(parent);

Child child = new Child(parent);
childService.save(child);

But, I'm getting the following error:

org.springframework.dao.InvalidDataAccessApiUsageException: detached entity passed to persist: io.manuel.Parent; nested exception is org.hibernate.PersistentObjectException: detached entity passed to persist: io.manuel.Parent

The thing is, if I remove the annotation @MapsId, it works. What do I have to do to make it work with the annotation?

Upvotes: 0

Views: 407

Answers (1)

pvpkiran
pvpkiran

Reputation: 27078

You need to do it this way 

Parent savedParent = parentRepository.save(parent);

Child child = new Child(savedParent);
childService.save(child);

You have to get hold of the persisted object and use it. That is what the exception says, you are passing a detached(not persistent) entity to save. Here is a nice picture of different states an entity can be.

enter image description here

Upvotes: 1

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