I have a many-to-one where the 'one' part has a key value, but no row in the DB.
I need to be able to access the key for this missing row, but I get an ObjectNotFoundException.

My understanding is that the proxy contains the key value and you can access that without causing DB access.

Parent Entity:


MpuEntity:


Issue (this throws a ObjectNotFoundException):


Is there a way to get the key value when the child row does not exist ?

Thanks,
Craig.

My guess is that you need to have the @Id annotation on the getter method instead of on the private field.

I believe that annotations may be specified on the variable declaration or the getter. It should make no difference to Hibernate.

Yes, there is a difference. Access to fields can't be intercepted by proxies. Hibernate can't really know that the getOrderId() method is related to the orderId field, so I think Hibernate then initializes the proxy on any method call. I remember seeing some information about it, but right now I can't find it again.

I found the problem. I had a named query that had 'parent.getChild().getField() = :x' in it and it was this that triggered the exception.

Tomorrow I will revert the code to what it was originally (I changed it to remove the many-to-one). If the key access does not work I'll owe you a beer :), but I suspect I will be the one enjoying the beverage.

Regards,
Craig.