I was trying to configure a multilevel inheritance mapping (either using joint-
table or single-table) but it didn't work as I was expecting it to.
I understand that it probably has never been thought of, but in my particular
use case, it would have been really handy.
Any idea if this is
multilevel sounds like you mean this:
class A:
class B(A):
class C(B):
class D(C):
That's supported fully in all cases, and for single/joined should work without
any special steps (for concrete its slightly more weird). If this is not
working then we can get you going with some test cases.