Hibernate3 does not lazy load by default

praveenag · **Joined:** Tue Mar 08, 2011 7:07 am **Posts:** 1

Hi,

We have used Hibernate 3 with annotation based mapping. Hibernate by default does Lazy Loading on all associations. We have implemented a one-to-many relationship through a join table. The problem here is the associations are always eagerly loaded until I explicitly set fetch=FetchType.LAZY ? Is this required ? Shouldn't hibernate load it lazily by default ?

Code:

public class User{
@OneToMany
    @JoinTable(name = "user_system", joinColumns = {
            @JoinColumn(name = "user_id", unique = true)
    },
            inverseJoinColumns = {
                    @JoinColumn(name = "system_id")
            }
    )
    private List<System> systems = new ArrayList<System>();
}

public class System{
@ManyToOne
    @JoinTable(name = "user_system",
            joinColumns = {@JoinColumn(name = "system_id", unique = true)},
            inverseJoinColumns = {@JoinColumn(name = "user_id")}
    )
    private User user;
}

mmerder · **Posted:** Tue Mar 08, 2011 9:46 am

Quote:

@OneToMany and @ManyToMany associations are defaulted to LAZY and @OneToOne and @ManyToOne are defaulted to EAGER.

from http://docs.jboss.org/hibernate/stable/annotations/reference/en/html_single/#entity-mapping-association