I don't understand why my app drop Exception "Field 'Id_employeer' doesn't have a default value".
Id_employeer is my primary key, when I try to save any information to my database I got that exception, but, when I try just to read info from DB it's working.
I read topic on StackOverflow, but I still don't understand the answers in my app. I'm working with Hibernate 5.2.11.
My CharacterInfo.hbm.xml:
<?xml version="1.0"?>
<!--
~ Hibernate, Relational Persistence for Idiomatic Java
~
~ License: GNU Lesser General Public License (LGPL), version 2.1 or later.
~ See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
-->
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="CharacterInfo" table="employees">
<id name="Id" column="id_employeer">
<generator class="native"/>
</id>
<property name="Login" column="employeer_login"/>
</class>
</hibernate-mapping>
My HibernateUtility:
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.boot.MetadataSources;
import org.hibernate.boot.registry.StandardServiceRegistry;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import java.util.List;
public class HibernateUtility {
SessionFactory sessionFactory;
public void saving(Object object){
Session session = sessionFactory.openSession();
session.beginTransaction();
session.save( object);
//session.save( new CharacterInfo().getLogin());
session.getTransaction().commit();
session.close();
}
public void reading(){
Session session = sessionFactory.openSession();
session.beginTransaction();
List result = session.createQuery("from CharacterInfo").list();
for ( CharacterInfo characterInfo : (List<CharacterInfo>) result ) {
System.out.println( "CharacterInfo (" + characterInfo.getLogin() + ") : " + characterInfo.getLogin() );
}
session.getTransaction().commit();
session.close();
}
protected void setUp() throws Exception {
final StandardServiceRegistry registry = new StandardServiceRegistryBuilder().configure()
.build();
try {
sessionFactory = new MetadataSources(registry).buildMetadata().buildSessionFactory();
} catch (Exception e) {
StandardServiceRegistryBuilder.destroy(registry);
}
}
}
Next CharacterInfo class
import org.hibernate.annotations.GenericGenerator;
import javax.persistence.*;
@Entity
@Table( name = "employees")
public class CharacterInfo {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "Id_employeer")
private int id ;
@Column(name = "employeer_Login")
private String login;
public CharacterInfo() {}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getLogin() {
return login;
}
public void setLogin(String login) {
this.login = login;
}
}
main class
public class main {
public static void main(String args[]) throws Exception {
HibernateUtility hibernateUtility = new HibernateUtility();
CharacterInfo characterInfo = new CharacterInfo();
characterInfo.setId(1);
characterInfo.setLogin("PawJaw");
hibernateUtility.setUp();
hibernateUtility.saving(characterInfo);
}
}
and in the end Exception
ERROR: Field 'Id_employeer' doesn't have a default value Exception in thread "main" org.hibernate.exception.GenericJDBCException: could not execute statement at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:47) at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:111) at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:97) at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:178) at org.hibernate.dialect.identity.GetGeneratedKeysDelegate.executeAndExtract(GetGeneratedKeysDelegate.java:57) at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:42) at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2919) at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3490) at org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:81) at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:626) at org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:280) at org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:261) at org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:306) at org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:318) at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:275) at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:182) at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:113) at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:192) at org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:38) at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:177) at org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:32) at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:73) at org.hibernate.internal.SessionImpl.fireSave(SessionImpl.java:691) at org.hibernate.internal.SessionImpl.save(SessionImpl.java:683) at org.hibernate.internal.SessionImpl.save(SessionImpl.java:678) at HibernateUtility.saving(HibernateUtility.java:17) at main.main(main.java:10) Caused by: java.sql.SQLException: Field 'Id_employeer' doesn't have a default value at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:964) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3973) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3909) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2527) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2680) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2487) at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1858) at com.mysql.jdbc.PreparedStatement.executeUpdateInternal(PreparedStatement.java:2079) at com.mysql.jdbc.PreparedStatement.executeUpdateInternal(PreparedStatement.java:2013) at com.mysql.jdbc.PreparedStatement.executeLargeUpdate(PreparedStatement.java:5104) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1998) at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:175) ... 23 more
