[hibernate-issues] [Hibernate-JIRA] Resolved: (ANN-725) @OneToOne: optional = true is ignored

@OneToOne: optional = true is ignored ------------------------------------- Key: ANN-725 URL: http://opensource.atlassian.com/projects/hibernate/browse/ANN-725 Project: Hibernate Annotations Issue Type: Bug Components: binder Affects Versions: 3.3.0.ga Environment: hibernate 3.2.4.sp1 Reporter: Adrian Moos Priority: Minor In some entity, I map: @javax.persistence.OneToOne(targetEntity = InfoAutoVerrechnungImpl.class, fetch = FetchType.LAZY, // optional = true) @javax.persistence.JoinColumns(/**/{ @javax.persistence.JoinColumn(name = "MI0153A", referencedColumnName = "MI0153A", // nullable = false, updatable = false, insertable = false), @javax.persistence.JoinColumn(name = "MI1997A", referencedColumnName = "MI1997A", // nullable = false, updatable = false, insertable = false) }) public InfoAutoVerrechnung getInfoAutoVerrechnung(); The optional = true is lost during construction of hibernate's configuration metamodel, as the property is represented using a ManyToOneType (!) with ignoreNotFound == false (and hence nullable == false). Consequently, hibernate installs a proxy for the property on entity load even if the remote end of the association does not exist (whose lazy initialization fails with an ObjectNotFoundException). Expected behavior: Hibernate should either respect the optional = true, or throw a MappingException (ideally mentioning the expected way to express nullability). Workaround: Adding @NotFound(action = NotFoundAction.IGNORE) causes hibernate to treat the property as nullable.