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I'm trying to persist an object to a database. Keep getting 'Column ID cannot accept null value error'. My object looks like this: @Entity public class TestTable { @Id @GeneratedValue(strategy = GenerationType.AUTO) private Integer id = 0; @Column(nullable=false, length=256) private String data = ""; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getData() { return data; } public void setData(String data) { this.data = data; } } My persist function: public static synchronized boolean persistObject(Object obj){ boolean success = true; EntityManager em = null; EntityTransaction tx = null; try{ em = getEmf().createEntityManager(); tx = em.getTransaction(); tx.begin(); em.persist(obj); tx.commit(); } catch (Exception e){ success = false; } finally{ try{ em.close(); } catch(Exception e){ //nothing } } return success; }
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