EntityManager persist() method does not insert record to database

Question

I have problem with using EntityManager.persist(Object) method. Now when i get rid of other problems, by app work without Exception but object is not put in my data

Answer 1

Can you post what exception are you getting? I will assume that your error is that your persistence.xml you don't specified your "Chain" Object.

You can specify using this tag

false

Or just

 your.package.Chain

Put this above provider tag.

Also, never set a number for a column tagged as @Id

When you use method save() with a Id column with setted value, hibernate will try to UPDATE NOT INSERT your data.

Do this: Create getEntityManager Method

public EntityManager getEntityManager() {
    return entityManager;
}

Then

@Transactional
public void saveChain(Chain chain) {

    chain.setDate(new Date());
    getEntityManager().persist(chain);
}