Hi there!
I have a ManyToMany relation between ClassA and ClassB, defined in the following way:
ClassA
@Id @GeneratedValue
@Column(name="id")
private Integer id;
@Column(name="prod_name")
private String pName;
@ManyToMany(fetch = FetchType.EAGER,cascade = CascadeType.PERSIST,
targetEntity=com.myTest.ClassB.class)
@JoinTable(name="a_b_relation",
joinColumns={@JoinColumn(name="a_id")},
inverseJoinColumns={@JoinColumn(name="b_id")})
@Fetch(value=FetchMode.SELECT)
private List<ClassB> bList = new ArrayList<ClassB>(0);
.... constructor and getter/setterClassB
@Id @GeneratedValue
@Column(name="id")
private Integer id;
@Column(name="prod_price")
private String prodPrice;
... constructor and getter/setter
when I try to persist ClassA I am getting following exception
Caused by: java.sql.BatchUpdateException: Cannot add or update a child row: a foreign key constraint fails
at com.mysql.jdbc.PreparedStatement.executeBatchSerially(PreparedStatement.java:1237)
at com.mysql.jdbc.PreparedStatement.executeBatch(PreparedStatement.java:936)
at org.jboss.resource.adapter.jdbc.WrappedStatement.executeBatch(WrappedStatement.java:519)
at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:48)
at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:246)
...
Any Help!!
Thanks
Pankaj
