Validating subclasses

[timonbimon]

Question

I was wondering what the best way to validate subclasses is?
Something along the sorts of

import pydantic
class MyClass:
    pass
class MySubClass(MyClass):
    pass
class MyOtherClass:
    pass

class Foo(BaseModel):
    a_class_not_an_object: Type[MyClass]

where I would expect both

Foo(a_class_not_an_object=MyClass)
Foo(a_class_not_an_object=MySubClass)

to work, but

Foo(a_class_not_an_object=MyOtherClass)

to throw an error.
Is the way to go to implement a custom type or is there a way pydantic supports this out-of-the-box?

Have a good weekend :)

[samuelcolvin]

Might be possible to achieve this now using validator decorators. Please let us know whether or not you get it to work.

I'd be happy to accept a PR to implement it out of the box if it's something multiple people want.

[timonbimon]

Alright, I've been freeriding long enough. 😉
Just made a MR that should resolve the issue. :)
Thanks for making an awesome library. pydantic rocks 💯