Unknown entity on hibernate

Question

I got this error when executing the main class. Am trying to insert new record at the table portfolio. As you see am using Hibernate ORM model to do that. Also it is good to say that hibernate doing the connection to the database without any problem !

Exception in thread "main" org.hibernate.MappingException: Unknown entity: com.nortal.vspa.model.Portfolio
at org.hibernate.internal.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:1129)
at org.hibernate.internal.SessionImpl.getEntityPersister(SessionImpl.java:1402)
at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:117)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:204)
at org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:55)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:189)
at org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:49)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90)
at org.hibernate.internal.SessionImpl.fireSave(SessionImpl.java:756)
at org.hibernate.internal.SessionImpl.save(SessionImpl.java:748)
at org.hibernate.internal.SessionImpl.save(SessionImpl.java:744)
at com.nortal.vspa.main.Main.main(Main.java:24)

Entity Class:

@Entity
@Table(name="portfolio")
public class Portfolio implements Serializable {

private static final long serialVersionUID = -1136208004146721604L;

@Id
@Column(name="symbol")
private String symbol;

public String getSymbol()
{
    return symbol;
}

public void setSymbol(String symbol)
{
    this.symbol = symbol;
}
}

Main Class:

public class Main {

/**
 * @param args
 */
public static void main(String[] args) {

     Session session =  HibernateUtil.getSessionFactory().openSession();
     session.beginTransaction();
    Portfolio portfolio = new Portfolio();

    portfolio.setSymbol("MB");

    session.save(portfolio);
    session.getTransaction().commit();

}

}

Is this the only entity in the application? Have you successfully persisted other entities? — Kevin Bowersox
– Kevin Bowersox, Commented Dec 2, 2012 at 9:33
@kmb385 nope. there are another entities. I don't try them yet ! — Hatem Salem
– Hatem Salem, Commented Dec 2, 2012 at 9:37
So you expect me to cut and paste the solution from that page, because you don't have time to click a link? — Dawood ibn Kareem
– Dawood ibn Kareem, Commented Dec 2, 2012 at 9:55

JB Nizet · Accepted Answer · 2012-12-02 09:46:49Z

29

The Hibernate configuration file must list the entity classes:

<mapping class="com.foo.bar.Portfolio"/>

Or you must explicitely add the class to the configuration using

configuration.addClass(com.foo.bar.Portfolio.class)

answered Dec 2, 2012 at 9:46

JB Nizet

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1 Comment

Roopak A Nelliat Over a year ago

Does the order of the mapping class configurations matter? I have the mapping class listed in the configuration file, still the exception is coming.

Sachin Gaikwad · Accepted Answer · 2021-01-16 06:27:01Z

0

This might be because of incorrect dialect name. In my case I have added server version number along with the MySQL dialect. ex. org.hibernate.dialect.MySQL8Dialect

answered Jan 16, 2021 at 6:27

Sachin Gaikwad

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