Joseph Hwang [http://community.jboss.org/people/aupres] created the discussion "Field 'record_EMP_ID' doesn't have a default value" To view the discussion, visit: http://community.jboss.org/message/621434#621434 -------------------------------------------------------------- I solved org.hibernate.TransientObjectException (http://community.jboss.org/thread/171019?tstart=0) by adding &quot;(a)OneToMany(fetch=FetchType.EAGER, cascade=CascadeType.ALL)" But this time values can't be inserted to DB. OS : Windows 7  JDK : JDK 1.6 JBoss : JBoss 5.1.0.GA DB : MySQL 5.5 Error is "Field 'record_EMP_ID' doesn't have a default value" *- Members.java* @Entity @Table(name = "family") public class Members implements Serializable {   @Id   @Column(name = "EMP_ID")   private String id ;   @Column(name = "EMP_Passwd")   private String passwd ;   @Column(name = "EMP_Name")   private String name ;   @OneToMany(fetch=FetchType.EAGER, cascade=CascadeType.ALL)   @JoinTable(name="info", joinColumns = {@JoinColumn(name (http://community.jboss.org/mailto:%7B@JoinColumn(name) = "EMP_Name")})   private Collection<Records> record = new ArrayList();    ....getter and setter } *- Records.java* @Entity @Table(name = "info") public class Records implements Serializable {   @Id   @GeneratedValue(strategy=GenerationType.AUTO)   @Column(name = "EMP_ID")   private int i;   @Column(name = "EMP_Name")   private String name;     @Column(name = "EMP_Bank_Account")   private String account;   @Column(name = "EMP_Hobby")   private String hobby;   @Column(name = "EMP_Phone")   private int phone;   ...getter and setter method } in jsp file I invoke EntityManager.persist Context ctx = new InitialContext(); IMappingTestPort port = (IMappingTestPort) ctx.lookup("MappingTestBean/remote"); Records r = new Records(); r.setName("aaa"); r.setAccount("111-2222"); r.setHobby("bbb"); r.setPhone(021112222); Members m = new Members(); m.setId("aupres"); m.setPasswd("aaa"); m.setName("ccc"); m.getRecord().add(r); port.setFamilyMember(m); // This EntityManager.persist method But it failed. In console 20:21:29,233 INFO [STDOUT] Hibernate: insert into family (EMP_Name, EMP_Passwd, EMP_ID) values (?, ?, ?) 20:21:29,268 INFO [STDOUT] Hibernate: insert into info (EMP_Bank_Account, EMP_Hobby, EMP_Name, EMP_Phone) values (?, ?, ?, ?) 20:21:29,288 WARN [JDBCExceptionReporter] SQL Error: 1364, SQLState: HY000 20:21:29,288 ERROR [JDBCExceptionReporter] Field 'record_EMP_ID' doesn't have a default value record_EMP_ID is automatically generated by hibernate Pls help! -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/621434#621434] Start a new discussion in EJB3 at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]