[jboss-user] [JBoss Seam] - Fail to persist sub class

[xtia004]

I have the following code. CreditCardPayment is inherited from Payment and added some extra fields.

@Entity
  | @Table(name = "PAYMENT")
  | @Name("payment")
  | @Inheritance(strategy=InheritanceType.JOINED)
  | @DiscriminatorColumn(name="PAY_METHOD", discriminatorType=DiscriminatorType.STRING, length=2)
  | public class Payment implements java.io.Serializable {
  | 
  | 	private static final long serialVersionUID = 581797746676908701L;
  | 
  | 	@TableGenerator(name = "objectIdGen", table = "OP_SEQUENCE_GENERATOR", pkColumnName = "GEN_KEY", valueColumnName = "GEN_VALUE", pkColumnValue = "OBJECT_ID", initialValue = 1, allocationSize = 1)
  | 	@Id
  | 	@GeneratedValue(strategy = GenerationType.TABLE, generator = "objectIdGen")
  | 	@Column(name = "OBJECT_ID", nullable = false)
  | 	private Long objID;
  | 
  | 	@Column(name = "PAYMENT_CODE", length = 10, nullable = false)
  | 	private String paymentCode;
  | 
  | 	@Column(name = "PAID_AMOUNT", nullable = false)
  | 	private BigDecimal paidAmount;
  | 
  | 	@Column(name = "PAID_DATE", nullable = false)
  | 	@Basic @Temporal(TemporalType.DATE)
  | 	private Date paidDate;
  | 
  | 	@Column(name = "PAY_METHOD", length = 2, nullable = false)
  | 	private String payMethod;
  | 
  | 	...
  | }
  | 
  | 
  | 
  | @Entity
  | @Table(name = "CREDITCARD_PAYMENT")
  | @Name("creditCardPayment")
  | @DiscriminatorValue("CC")
  | public class CreditCardPayment extends Payment {
  | 
  | 	private static final long serialVersionUID = -4171432845137278960L;
  | 
  | 	@JoinColumn(name = "CREDITCARD_ID")
  | 	@ManyToOne
  | 	private CreditCard creditCard;
  | 	
  | 	@Column(name = "AUTH_CODE", length = 15, nullable = false)
  | 	private String authCode;
  | 	
  | 	@Column(name = "DPS_TXN_REF", length = 31, nullable = false)
  | 	private String dpsTxnRef;
  | 
  | 	...
  | }


When I create object of CreditCardPayment using following code and persist it. I got exception:anonymous wrote : Caused by: org.hibernate.PropertyValueException: not-null property references a null or transient value: com.oneplace.payment.CreditCardPayment._paymentsBackref
I have checked I didn't miss any fields. What's the property "paymentsBackref" from and how to set it. Please somebody help me.

CreditCardPayment payment = new CreditCardPayment();
  | payment.setAuthCode(authCode);
  | payment.setDpsTxnRef(dpsTxnRef);
  | payment.setCreditCard(card);
  | payment.setPaymentCode(paymentCode);
  | payment.setPaidAmount(getSelectedSum());
  | payment.setPaidDate(DateTimeUtil.getCurrentDate());
  | payment.setPayMethod(payMethod);
  | ...
  | em.persist(payment);

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