I have a first entity MediaAlbum with a @Transient field that holds a List
of another entity Media. After querying for a list of MediaAlbum I get an
exception:
Error in meta-data for
com.yumyumlabs.foundation.appengine.media.model.Media.id: Cannot have a
java.lang.Long primary key and be a child object (owning field is
com.yumyumlabs.foundation.appengine.media.model.MediaAlbum.media).
org.datanucleus.store.appengine.MetaDataValidator$DatastoreMetaDataException:
Error in meta-data for
com.yumyumlabs.foundation.appengine.media.model.Media.id: Cannot have a
java.lang.Long primary key and be a child object (owning field is
com.yumyumlabs.foundation.appengine.media.model.MediaAlbum.media).
at
org.datanucleus.store.appengine.MetaDataValidator.checkForIllegalChildField(MetaDataValidator.java:376)
Once this exception has been raised I can no longer persist Media objects,
as calling persistence manager makePersistent silently fails and the Media
object I was trying to save does not have an id assigned and does not appear
to be in the datastore.
If I kill the server and restart, I can continue creating Media objects
until I again try to list them and get the above exception, and then Media
cannot be persisted again.
I'm running app engine 1.4.3. Any ideas?
--
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 [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/google-appengine-java?hl=en.
