Using the Datastore viewer, I see my child entity right after it is created
via my application. Next, the user updates a couple fields on the child
entity and saves it. However the Datastore viewer no longer "sees" the
entity! I see no processing or transaction errors in the logs. I do see
the parent's child collection field appears to still contain the child ala:
[datastore_types.Key.from_path(u'Parent', u'1527525075', u'Child',
5799236641751040L, _app=u's~myapp')]
In fact, the user still sees the relationship in the application! But...
When I redeploy a newer version of the app, or the memcache is cleared
(and the browser is closed) even the parent's child collection field is
reset to it's previous value.
So, the child entity is clearly hanging out in memory, but I don't
understand why it doesn't appear in the database?
BTW, this functionality used to work prior to upgrading from the appengine
SDK from 1.7.5 to 1.8.1.1, and now 1.8.2. I use Java with JDO for
persistence.
This is the definition for the child collection in the parent class:
@Persistent(dependentElement="true")
private Set<Child> children;
This is the definition of the child:
@PersistenceCapable(identityType=IdentityType.APPLICATION,
detachable="true")
public class Child implements Serializable, Comparable<Child>
{
@PrimaryKey
@Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
private Key key;
The children are detached for the update processing by the user. I ensure
the parent has the new child in it's collection. I then save the child,
then the parent.
This is quite perplexing and driving me crazy as this all used to work!
Does anyone have any ideas?
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