[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-2883) ManyToMany doesn't work with polymorfism

[Gail Badner (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-2883?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_28551 ] 

Gail Badner commented on HHH-2883:
----------------------------------

Please attach a runnable test case (Java + mappings).

> ManyToMany doesn't work with polymorfism
> ----------------------------------------
>
>                 Key: HHH-2883
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2883
>             Project: Hibernate3
>          Issue Type: Bug
>    Affects Versions: 3.2.4
>         Environment: Hibernate 3.2.4, Annotations 3.3.0, Entitymanager 3.3.0
>            Reporter: Dirk
>
> We tried out the SingleTable inheritance with a ManyToMany
> @Entity
> @Table(name="SHB_PRINCIPAL")
> @Inheritance(strategy=InheritanceType.SINGLE_TABLE)
> @DiscriminatorColumn(name="TYPE",discriminatorType=DiscriminatorType.INTEGER)
> @Cache(usage=CacheConcurrencyStrategy.TRANSACTIONAL)
> public class Principal implements Serializable {
> ....
> @Entity
> @DiscriminatorValue(PrincipalType.USER_NR)
> @Cache(usage=CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
> public class ApplicationUser extends Principal {
> private static final long serialVersionUID = 1L;
> @ManyToMany(fetch=FetchType.LAZY, cascade={CascadeType.PERSIST, CascadeType.MERGE, CascadeType.REFRESH},
> targetEntity=Role.class)
> @JoinTable(name="SHB_PRINCIPAL_TO_PRINCIPAL",
> joinColumns=@JoinColumn(name="FROM_PRINCIPAL_ID"),
> inverseJoinColumns=@JoinColumn(name="TO_PRINCIPAL_ID"))
> private Set<Role> roles;
> @ManyToMany(fetch=FetchType.LAZY, cascade={CascadeType.PERSIST, CascadeType.MERGE, CascadeType.REFRESH},
> targetEntity=ApplicationGroup.class)
> @JoinTable(name="SHB_PRINCIPAL_TO_PRINCIPAL",
> joinColumns=@JoinColumn(name="FROM_PRINCIPAL_ID"),
> inverseJoinColumns=@JoinColumn(name="TO_PRINCIPAL_ID"))
> private Set<ApplicationGroup> groups;
> @Entity
> @DiscriminatorValue(PrincipalType.GROUP_NR)
> @Cache(usage=CacheConcurrencyStrategy.NONSTRICT_READ_WRITE)
> public class ApplicationGroup extends Principal {
> private static final long serialVersionUID = 1L;
> @ManyToMany(fetch=FetchType.LAZY, cascade={CascadeType.PERSIST, CascadeType.MERGE, CascadeType.REFRESH})
> @JoinTable(name="SHB_PRINCIPAL_TO_PRINCIPAL",
> joinColumns=@JoinColumn(name="TO_PRINCIPAL_ID"),
> inverseJoinColumns=@JoinColumn(name="FROM_PRINCIPAL_ID"))
> private Set<ApplicationUser> users;
> public ApplicationGroup() {
> super();
> this.type = PrincipalType.GROUP;
> }
> public Set<ApplicationUser> getUsers() {
> return users;
> }
> public void setUsers(Set<ApplicationUser> users) {
> this.users = users;
> }
> }
> But in the groups and the roles of the user, hibernate returns all principals, not only the users or groups. In the query it's clear that the descriminator is NOT used.

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