I am again working on my ERRest based push notification server, and am having
an issue with the framework.
I am using a version of Wonder from last week (the 5.4 branch), in eclipse 3.6
using a MySQL database on the development machine.
I looked at the example app, and copied the key functions from it (after
wasting time trying to over-think it for a while going back to the easy method).
I can add a new object, it stores it in the database, but if I then attempt to
delete it using the code:
@Override
public WOActionResults destroyAction() throws Throwable {
NotificationType type = notificationType();
type.delete();
editingContext().saveChanges();
return response(type, showFilter());
}
The "type" gets the delete message, saveChanges deletes the row in the database
(the EO_PK_TABLE still shows it's pk as the current pk, which I gather is
normal) but then the returned method
response(type, showFilter());
crashes with an NPE deep in the guts of ERRest:
requestNode._fillInWithObjectAndFilter(obj, classDescription,
keyFilter, delegate, new HashSet<Object>());
This is called in ERXRestRequestNode.java. It appears (though I'm not
completely sure) that the method is asking for the old object it just deleted,
and there isn't one, because it just deleted it. However, I copied this code
directly from the example, so something somewhere is going wrong that doesn't
go wrong in the example app.
So, I can avoid all this by just returning null, as the user will not actually
need to get a response, but I thought I'd ask the question, what should I be
doing here, and what might be going wrong?
Andrew
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