Thanks for your reply Andrus.

I don't suppose that there is a way to tell Cayenne not to be so eager in this case ?

Jurgen


-----Original Message----- From: Andrus Adamchik
Sent: Friday, December 20, 2013 8:27 AM
To: [email protected]
Subject: Re: Inheritance Question

From what I can tell, this is the intended behavior. If your SelectQuery
root is ClassOne, Cayenne expects that the result might contain a mix of ClassOne and any of its subclasses (which means ClassTwo as well). So the columns in SELECT are a superset of columns for all the classes involved.

Andrus


On Dec 12, 2013, at 12:30 PM, [email protected] wrote:
Hi All

I have a dbEntity say ClassOne (its lightweight) and another that inherits from it as ClassTwo (its heavyweight).

Now in my case I have a prefetch that retrieves ClassOne objects.

The problem that I have is that Cayenne is fetching ClassTwo data as well ?!

Surely Cayenne should only be fetching the ClassOne data, why is ClassTwo data also being retrieved ?

Is this the intended behaviour ?   Is there a way to prevent it ?

Thanks, Jurgen




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