What you'll want to do is to retrieve the object before closing the PersistenceManager and storing it into request scope. That is:
PersistenceManager pm = PMF.get().getPersistenceManager(); MyUser u = pm.get // .. some retrieval code; u.getContactInfo(); pm.close(); We'll be changing this behavior in an upcoming release so that embedded objects, text, blob and list fields that are not retrieved by default will be retrieved on a fetch. On Wed, Nov 18, 2009 at 11:41 AM, IlyaE <ilyaelk...@gmail.com> wrote: > Running into another issue. So i'm detaching my object and passing it > along in a session. > > I'm now getting this error WARNING: > javax.jdo.JDODetachedFieldAccessException: You have just attempted to > access field "contactInfo" yet this field was not detached when you > detached the object. Either dont access this field, or detach it when > detaching the object. > > my contactInfo is an embedded persistent object in the object i am > detaching. > @Embedded > @Persistent > private ContactInfo contactInfo; > > If i make contactInfo @Persistent(defaultFetchGroup="true") then i get > this error. > WARNING: The datastore does not support joins and therefore cannot > honor requests to place child objects in the default fetch group. The > field will be fetched lazily on first access. You can modify this > warning by setting the datanucleus.appengine.ignorableMetaDataBehavior > property in your config. A value of NONE will silence the warning. A > value of ERROR will turn the warning into an exception. > > What is the correct way of making sure this embedded object is also > detached when i save it to the session? > > On Nov 14, 6:37 am, datanucleus <andy_jeffer...@yahoo.com> wrote: > > What state is the object in when you access its field ? (Call > > JDOHelper.getObjectState(obj)). > > Since no transaction boundaries or PM lifecycle is presented, it's > > hard to guess. If you leave the object to become "transient" then it > > will likely have its field values nulled when leaving the transaction/ > > PM (unless you bothered setting javax.jdo.option.RetainValues) > > -- > > You received this message because you are subscribed to the Google Groups > "Google App Engine for Java" group. > To post to this group, send email to > google-appengine-j...@googlegroups.com. > To unsubscribe from this group, send email to > google-appengine-java+unsubscr...@googlegroups.com<google-appengine-java%2bunsubscr...@googlegroups.com> > . > For more options, visit this group at > http://groups.google.com/group/google-appengine-java?hl=en. > > > -- Ikai Lan Developer Programs Engineer, Google App Engine -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-j...@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=.
