Support for querying objects by class name

[shmidt]

I have some subclasses of Animal class, like Cats, Dogs, and so on.
I want to make a unified table view controller for all Animal subclasses, and pass class name to it to show Cats or Dogs objects.

Is it possible to do that in current version?

P.S. In CoreData I did it by modifying entityName in fetch request.

[jpsim]

This is a limitation both in Realm's inheritance model and in the underlying db representation. We're already tracking this in #1109, so I'll close this as a duplicate to keep the conversation in one place.