I have a problem, that Appengine generates duplicate keys and thus my
objects get overwritten. I have following classes:
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class ProfileEntity {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key key;
@Persistent
private ImageDescriptionEntity mainImage;
...
}
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class ImageDescriptionEntity implements Serializable {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key key;
@Persistent(dependent="true")
private ImageDataEntity thumbnail;
@Persistent(dependent="true")
private ImageDataEntity fullsize;
...
}
@PersistenceCapable(identityType = IdentityType.APPLICATION)
public class ImageDataEntity implements Serializable {
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key key;
@Persistent
private Blob data;
...
}
Here's the code I'm using to store the images:
ProfileEntity profile = (ProfileEntity) pm.getObjectById
(ProfileEntity.class, key);
ImageDescriptionEntity imageDescription = new ImageDescriptionEntity
();
ImageDataEntity fullsize = new ImageDataEntity();
imageDescription.setFullsize(fullsize);
ImageDataEntity thumbnail = new ImageDataEntity();
imageDescription.setThumbnail(thumbnail);
profile.setMainImage(imageDescription);
pm.makePersistent(profile);
//the problem: fullsize.getKey().equals(thumbnail.getKey())
What happens, is that thumbnail and fullsize get assigned the same key
from appengine and thus fullsize gets overwritten by the tumbnail.
I'm not sure what I'm doing wrong.
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