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(Quick Reference)
attachPurposeAttaches a detached domain instance to the Hibernate session bound to the current threadExamplesdef b = Book.get(1) b.title = "Blah" b.save(flush:true)b.discard()… if(!b.isAttached()) { b.attach() } DescriptionGrails uses Hibernate which manages each persistent object in a persistence session. A new session is created per request and is closed at the end of the request. If an object is read from the session and placed into a web scope such as the HttpSession it is seen as detached, since the persistence session has been closed. You can use the attach() method to re-attach an existing persistent instance to the persistence session of the current request. |
Command LineConstraintsControllersDatabase MappingDomain ClassesPlug-insServicesServlet APITag LibrariesTags |