Hibernate @ManyToOne references an unknown entity

Question

I am receiving the following Hibernate Exception:

@OneToOne or @ManyToOne on Matchup.awayTeam references an unknown entity: Team

The simplified

Answer 1

Another solution: Check to ensure that the referenced class is included your hibernate.cfg.xml file.

Answer 2

If you are using Spring Boot in combination with hibernate, then actually you may just need to add the package to your @EntityScan base package array.

@SpringBootApplication(scanBasePackages = {"com.domain.foo.bar.*"})
@EnableJpaRepositories(basePackages ={"com.domain.foo.bar.*"})
@EntityScan(basePackages ={"com.domain.foo.bar.*", "com.domain.another.*"})
public class SpringBootApplication extends SpringBootServletInitializer {
}

Answer 3

I figured out the problem: I was not adding class Team to the Hibernate AnnotationConfiguration object. Thus, Hibernate was not recognizing the class.

Answer 4

Add the class in hibernate.cfg in proper order. First map the file that is going to be referred by another class

Answer 5

If you do not use the hibernate.cfg.xml you can add targetEntity parameter in @ManyToOne/@OneToMany annotation with class describing your entity.

For instance:

@ManyToOne(targetEntity = some.package.MyEntity.class)

Answer 6

Try to add the Qualified Name (ClassNAME), just like this:

<hibernate-configuration>
    <session-factory name="java:/hibernate/SessionFactory">
                  <mapping class="co.com.paq.ClassNAME" />
        </session-factory>
</hibernate-configuration>

In the File:

META-INF/hibernate.cfg.xml