[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-2710) Cannot specify on-delete="cascade" for a map or a set with just one element

Cannot specify on-delete="cascade" for a map or a set with just one element --------------------------------------------------------------------------- Key: HHH-2710 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2710 Project: Hibernate3 Issue Type: Improvement Components: core Affects Versions: 3.2.4 Reporter: Gerald Klopp Priority: Minor I'd like to specify the on-delete="cascade" attribute for a map or for a set with just one element. When I try to do this, I get the following exception : Initial SessionFactory creation failed.org.hibernate.MappingException: only inverse one-to-many associations may use on-delete="cascade" The on-delete="cascade" attribute can be specified for more complex relationships like one-to-many. But it seems that the case of a simple map or set is not covered. - Mapping document example: <hibernate-mapping> <class name="Document" table="DOCUMENT"> <id name="id" column="DOCUMENT_ID"> <generator class="native" /> </id> <map name="titles" table="DOCUMENT_TITLE" lazy="false"> <key column="DOCUMENT_ID" on-delete="cascade" /> <index column="LANGUAGE" type="string" /> <element column="TITLE" type="text" not-null="true" /> </map> <set name="references" table="DOCUMENT_REFERENCE" lazy="false"> <key column="DOCUMENT_ID" on-delete="cascade" /> <element type="string" column="REFERENCE" /> </set> </class> </hibernate-mapping> - Exception stack trace : Initial SessionFactory creation failed.org.hibernate.MappingException: only inverse one-to-many associations may use on-delete="cascade": Document.references Exception in thread "main" java.lang.ExceptionInInitializerError at fr.gklopp.test.hibernate3.util.HibernateUtil.<clinit>(HibernateUtil.java:17) at fr.gklopp.test.hibernate3.simple.DocumentManager.createAndStoreDocument(DocumentManager.java:23) at fr.gklopp.test.hibernate3.simple.DocumentManager.main(DocumentManager.java:68) Caused by: org.hibernate.MappingException: only inverse one-to-many associations may use on-delete="cascade": fr.gklopp.test.hibernate3.simple.Document.references at org.hibernate.mapping.Collection.validate(Collection.java:267) at org.hibernate.mapping.Set.validate(Set.java:19) at org.hibernate.cfg.Configuration.validate(Configuration.java:1106) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1287) at fr.gklopp.test.hibernate3.util.HibernateUtil.<clinit>(HibernateUtil.java:13) ... 2 more - Database : Oracle 10