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(Quick Reference)
isAttachedPurposeReturns whether the domain instance is attached to a currently active session or not. This method is often used on conjunction with the merge or attach methods.ExamplesBook b = session.book
…
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 |