@OneToMany collection is not filled when it should when the PK is of uniqueidentifier ------------------------------------------------------------------------------------- Key: HIBERNATE-59 URL: https://issues.jboss.org/browse/HIBERNATE-59 Project: Hibernate Integration Issue Type: Bug Environment: Windows XP SP2 JBoss 4.2 CR1 SQL Server 2000 Reporter: Tobias Bergman Assignee: Steve Ebersole Priority: Critical I have found a problem when using uniqueidentifier as PK and FK. A collection which should have entires are empty. The same code will have a non-empty collections when tested on glassfish. import javax.persistence.*; import java.util.List; @Entity @Table(name = "A") public class A { @Id @Column(name = "Id") private String mId; @OneToMany(mappedBy = "mA") private List<B> mBList; //Getter and setters to the members... } @Entity @Table(name = "B") public class B { @Id @Column(name = "Id") private String mId; @ManyToOne @JoinColumn(name = "AId") private A mA; //Getter and setters to the members... } When the db type is an uniqueidentifier the mBList list is not filled! If the db type is changed to a string the List is filled correctly. But it works with uniqueidentifier when the entity is merged (when creating a new entity A and some B's).