CODEWITHSUNDEEP
javamysqlspringhibernatejpa
rcheuk
rcheuk

Reputation: 1140

Hibernate jpa sub object not saving

I'm new to Hibernate and JPA in Spring, so this is probably a beginner error. I'm having trouble persisting an object with its association.

For example:

Dog dog = new Dog();
Breed breed = dao.getBreedById(1); (gets persistent object)

dog.setName("Pluto");
dog.setBreed(breed);

save(dog);

The dog and all fields save, but the breed association does not save in the database. I don't get any errors. It just doesn't save. Anyone know what I'm doing wrong?

I traced the issue to an annotation that had been in place ... that left me hitting myself afterwards. -.-

I had:

@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name = "breed_id", insertable = false, updatable = false)
private Breed breed;

Sigh. Removing the insertable and updatable clause fixed the problem.

Upvotes: 1

Views: 297

Answers (1)

Salih Erikci
Salih Erikci

Reputation: 5087

You save the dog into the DB. If what you want is breed have the dog, you should set this manually as well. There is no auto-relation in JPA

Dog dog = new Dog();
Breed breed = dao.getBreedById(1); (gets persistent object)

dog.setName("Pluto");
dog.setBreed(breed);
breed.getDogCollection.add(dog);//you have to maintain relationship manually

save(dog);

Upvotes: 1

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