我有一个简单的实体类MappingBean
@Entity
@Table(uniqueConstraints =@UniqueConstraint(columnNames = { "number" }))
public class MappingBean {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private int mappingid;
private String number;
private String name;
...}
当我打电话
entityManager.merge(this.mapping);
在MappingBean实例上我有时会得到
2015-04-22 16:32:08,552 ERROR [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (default task-15) Duplicate entry '03054445441' for key 'number'
2015-04-22 16:32:08,568 ERROR [org.jboss.as.ejb3] (default task-15) javax.ejb.EJBTransactionRolledbackException: org.hibernate.exception.ConstraintViolationException: could not execute statement
导致此例外的原因是什么？
最好的问候。
爱德蒙