attempt to create saveOrUpdate event with null entity
gwt, hibernate, spring
Solution
`null entity` could mean that `saveOrUpdate()` is actually receiving `null` as an argument, ie:
session.saveOrUpdate(null);
If you're using serialization to pass to object to a remote location (you mentioned RPC), perhaps you should check if serialization is working correctly. Something tells me that failing to serialize might end up with a null reference being passed.
Problem
I have a GWT app that makes an RPC call to a server to save/create a new entity. However, the Spring-Hibernate back-end throws an exception with the following error message: ``` attempt to create saveOrUpdate event with null entity ``` I'm not sure what that means. What's null? If it's a new entity I am saving, I am expecting to have the `id` field be `null` or possibly `0`, and then have hibernate fill it. Is this expectation correct?