Not able to insert data

[Selva Varadhan]

Hi,
I am getting fowllowing exception when i try to insert the data using hibernate

INFO: Named query checking : enabled
13 Aug, 2007 11:11:52 AM org.hibernate.impl.SessionFactoryImpl <init>
INFO: building session factory
13 Aug, 2007 11:11:53 AM org.hibernate.impl.SessionFactoryObjectFactory addInstance
INFO: Not binding factory to JNDI, no JNDI name configured
Inserting Record
Hibernate: insert into CITY (CITY_NAME) values (?)
could not insert: [com.quanta.movie.domain.City]
13 Aug, 2007 11:11:53 AM org.hibernate.util.JDBCExceptionReporter logExceptions
WARNING: SQL Error: 1364, SQLState: HY000
13 Aug, 2007 11:11:53 AM org.hibernate.util.JDBCExceptionReporter logExceptions
SEVERE: Field 'CITY_ID' doesn't have a default value


Model object

 @Entity
@Table(name = "CITY")
public class City {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "CITY_ID")
private Long cityId;
 
@Column(name = "CITY_NAME")
private String cityName;
 
public Long getCityId() {
return cityId;
}
 
public void setCityId(Long cityId) {
this.cityId = cityId;
}
 
public String getCityName() {
return cityName;
}
 
public void setCityName(String cityName) {
this.cityName = cityName;
}
}   

Please help me on this issue..

[Mark Spritzler]

What's your database that you are using? AUTO will use the default database way of generating IDs, so for instance, using MySQL which has primary Keys that auto increment their value when they receive and insert statement, versus Oracle which requires a Sequence table.

Mark