>From the error message, it sounds like the parent isn't getting set correctly. You'll need to share some of your code in order for me to help you further -- what does your Release class look like and how are you persisting it?
- Jason On Sat, Sep 12, 2009 at 4:36 AM, Anita <an...@ensarm.com> wrote: > > Hi Jason, > > Our schema looks as follows: > ProductType 1--------->M Product 1-------->M Release > > Data is inserting into Release table. But while fetching data from > release table i am getting following exception: > > Field com.ensarm.server.domain.Release.products should be able to > provide a reference to its parent but the entity does not have a > parent. Did you perhaps try to establish an instance of > com.ensarm.server.domain.Release as the child of an instance of > com.ensarm.server.domain.Products after the child had already been > persisted? > org.datanucleus.exceptions.NucleusUserException: Field > com.ensarm.server.domain.Release.products should be able to provide a > reference to its parent but the entity does not have a parent. Did > you perhaps try to establish an instance of > com.ensarm.server.domain.Release as the child of an instance of > com.ensarm.server.domain.Products after the child had already been > persisted? > at > org.datanucleus.store.appengine.DatastoreRelationFieldManager.lookupParent > (DatastoreRelationFieldManager.java:302) > at > > org.datanucleus.store.appengine.DatastoreRelationFieldManager.fetchRelationField > (DatastoreRelationFieldManager.java:289) > at > org.datanucleus.store.appengine.DatastoreFieldManager.fetchObjectField > (DatastoreFieldManager.java:271) > at org.datanucleus.state.AbstractStateManager.replacingObjectField > (AbstractStateManager.java:1197) > at com.ensarm.server.domain.Release.jdoReplaceField(Release.java) > at com.ensarm.server.domain.Release.jdoReplaceFields(Release.java) > at org.datanucleus.state.JDOStateManagerImpl.replaceFields > (JDOStateManagerImpl.java:2772) > at org.datanucleus.state.JDOStateManagerImpl.replaceFields > (JDOStateManagerImpl.java:2791) > at > org.datanucleus.store.appengine.DatastorePersistenceHandler.fetchObject > (DatastorePersistenceHandler.java:349) > at org.datanucleus.store.appengine.query.DatastoreQuery.entityToPojo > (DatastoreQuery.java:384) > at org.datanucleus.store.appengine.query.DatastoreQuery.entityToPojo > (DatastoreQuery.java:345) > at org.datanucleus.store.appengine.query.DatastoreQuery.access$700 > (DatastoreQuery.java:96) > at org.datanucleus.store.appengine.query.DatastoreQuery$5.apply > (DatastoreQuery.java:454) > at org.datanucleus.store.appengine.query.DatastoreQuery$5.apply > (DatastoreQuery.java:453) > at > org.datanucleus.store.appengine.query.StreamingQueryResult.resolveNext > (StreamingQueryResult.java:137) > at org.datanucleus.store.appengine.query.StreamingQueryResult > $1.computeNext(StreamingQueryResult.java:163) > at > org.datanucleus.store.appengine.query.AbstractIterator.tryToComputeNext > (AbstractIterator.java:132) > at org.datanucleus.store.appengine.query.AbstractIterator.hasNext > (AbstractIterator.java:127) > at org.datanucleus.store.appengine.query.StreamingQueryResult > $AbstractListIterator.hasNext(StreamingQueryResult.java:229) > at com.ensarm.server.servlet.GetData.getRelease(GetData.java:87) > at com.ensarm.server.servlet.GetData.doGet(GetData.java:32) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:693) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:806) > at > org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java: > 487) > at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter > (ServletHandler.java:1093) > at > com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter > (TransactionCleanupFilter.java:43) > at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter > (ServletHandler.java:1084) > at com.google.appengine.tools.development.StaticFileFilter.doFilter > (StaticFileFilter.java:124) > at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter > (ServletHandler.java:1084) > at org.mortbay.jetty.servlet.ServletHandler.handle > (ServletHandler.java:360) > at org.mortbay.jetty.security.SecurityHandler.handle > (SecurityHandler.java:216) > at org.mortbay.jetty.servlet.SessionHandler.handle > (SessionHandler.java:181) > at org.mortbay.jetty.handler.ContextHandler.handle > (ContextHandler.java:712) > at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java: > 405) > at > com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle > (DevAppEngineWebAppContext.java:54) > at org.mortbay.jetty.handler.HandlerWrapper.handle > (HandlerWrapper.java:139) > at com.google.appengine.tools.development.JettyContainerService > $ApiProxyHandler.handle(JettyContainerService.java:313) > at org.mortbay.jetty.handler.HandlerWrapper.handle > (HandlerWrapper.java:139) > at org.mortbay.jetty.Server.handle(Server.java:313) > at > org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java: > 506) > at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete > (HttpConnection.java:830) > at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:514) > at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211) > at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381) > at org.mortbay.io.nio.SelectChannelEndPoint.run > (SelectChannelEndPoint.java:396) > at org.mortbay.thread.BoundedThreadPool$PoolThread.run > (BoundedThreadPool.java:442) > > What should be done for this problem? > > Anita > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. 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