Update entity with many-to-one bidirectional mapping with Hibernate session

Hibernate ORM
1

Mapping in parent class: (Admin.java)

@OneToMany(fetch = FetchType.LAZY, mappedBy = "admin")
	@Cascade(value={CascadeType.SAVE_UPDATE})
	public Set<Phieuxacnhan> getPhieuxacnhans() {
		return this.phieuxacnhans;
	}

	public void setPhieuxacnhans(Set<Phieuxacnhan> phieuxacnhans) {
		this.phieuxacnhans = phieuxacnhans;
	}

Mapping in child class: (Phieuxacnhan.java)

	@ManyToOne(fetch = FetchType.LAZY)
	@Cascade(value={CascadeType.ALL})
	@JoinColumn(name = "MSCB", updatable=true)
	public Admin getAdmin() {
		return this.admin;
	}

My DAO update admin code: (AdminProcessing.java)

public void saveAdmin(Admin ad) throws  HibernateException, ClassNotFoundException {
		SessionFactory sessionFactory = HibernateUtil.getSessionFactory();
		Session session = sessionFactory.openSession();
		Transaction tran = null;
		try {
			tran = session.beginTransaction();
			session.save(ad);
			tran.commit();
		}catch(Exception e) {
			if(tran!=null) 
				tran.rollback();
		}finally {
			session.close();
		}
	}

My servlet code:

				Admin admin = df.getAdmin(mscb); // get an admin by admin id
				Phieuxacnhan phieu = df.getPXN(msphieu); // get a phieuxacnhan by phieuxacnhan id
				
				phieu.setAdmin(admin);
				admin.getPhieuxacnhans().add(phieu);
				
				AdminProcessing ap = new AdminProcessing();
				ap.saveAdmin(admin);

The code run without anr errors or bugs but I do not have any changes in my database.
Thank you for your response !

2

Show us the mappings and the data access code so we can see what you are doing.

1 Like
3

@vlad Thanks for responding! I’ve just edited my question with the code in it.

4

You need to add the generated SQL statements as well so we can see what happens.

Or, try to replicate it with this test case template.

1 Like
5

@vlad Ohh yes I will add the generated SQL statements and think more about this.
Nothing but thanks !