[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-1982) Merge doesnt work with composite keys

[Emmanuel Bernard (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-1982?page=comments#action_24994 ] 

Emmanuel Bernard commented on HHH-1982:
---------------------------------------

I doubt it, since there are some testcases in the unit test. But if you can build a minimal (one entity) runnable testcase that reproduce the issue, create a new issue and attach it. Or consider some community feedbacks in http://forum.hibernate.org

> Merge doesnt work with composite keys
> -------------------------------------
>
>          Key: HHH-1982
>          URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1982
>      Project: Hibernate3
>         Type: Bug

>   Components: core
>     Versions: 3.1.3
>     Reporter: Jara Cesnek
>      Fix For: 3.2.0.cr4

>
>
> Merge() operation as defined in JSR220 works fine with our entities with simple keys.
> But on tables with composite keys same doesnt works.
> Hibernate always try insert into table even when should only update.
> @IdClass(DOGaa_smlouva_dodatek.DOGaa_smlouva_dodatekPk.class)
> @MappedSuperclass
> public abstract class DOGaa_smlouva_dodatek  {
>     @Id
>     protected Integer id_pripad;
>    @Id
>     protected Integer pc_smlouva_dodatek;
>    @Embeddable
>    public static class DOGaa_smlouva_dodatekPk implements Serializable {
>        protected Integer id_pripad;
>        public Integer getId_pripad() {
>            return id_pripad;
>        }
>        public void setId_pripad(Integer id_pripad) {
>            this.id_pripad = id_pripad;
>        }
>        protected Integer pc_smlouva_dodatek;
>        public Integer getPc_smlouva_dodatek() {
>            return pc_smlouva_dodatek;
>        }
>        public void setPc_smlouva_dodatek(Integer pc_smlouva_dodatek) {
>            this.pc_smlouva_dodatek = pc_smlouva_dodatek;
>        }
>        public boolean equals(Object other){
>           if ( !(other instanceof DOGaa_smlouva_dodatekPk) ) {return false;}
>           DOGaa_smlouva_dodatekPk castOther = (DOGaa_smlouva_dodatekPk) other;
>           return new EqualsBuilder()
>           .append(id_pripad,castOther.id_pripad)
>           .append(pc_smlouva_dodatek,castOther.pc_smlouva_dodatek)
>           .isEquals();
>        }
>        public int hashCode() {
>           return new HashCodeBuilder()
>           .append(id_pripad)
>           .append(pc_smlouva_dodatek)
>           .toHashCode();
>        }
>    }
> }
> Second thing is when we try delete entity through merge on composite keys:
>                             doAttach = (DOParent) hao.getHibernateTemplate().merge(doDetach);
>                             hao.getHibernateTemplate().delete(doAttach);
> hibernate try first insert too and then delete. 
> When entity has simple key this code work fine.

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