{code}
@Entity
public class TestRow implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Id
private Long version;
setters and getters are ommited for it's triviality
}
{code}
2. creating database and table by hand
#mysql -u username ...
create table F_TESTROW (ID bigint not null auto_increment, VERSION bigint not null, primary key (VERSION, ID))
TestRow testRow = new TestRow();
testRow.setVersion(2L);
testRow.setAddr("somewhere");
sessionFactory.openSession().save(testRow);
produces
java.lang.IllegalArgumentException: Can not set java.lang.Long field ru.kctsoft.fenestro.domain.strategy.TestRow.id to org.hibernate.id.IdentifierGeneratorHelper$2
at org.hibernate.property.DirectPropertyAccessor$DirectSetter.set(DirectPropertyAccessor.java:139)
This is kinda frustrating.
http://docs.jboss.org/hibernate/stable/annotations/reference/en/html_single/
2.2.3.2.4. Partial identifier generation
Hibernate supports the automatic generation of some of the identifier properties. Simply use the @GeneratedValue annotation on one or several id properties.
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