Error 'Resolver' object has no attribute 'resolving' when using resolver_with_root.

[nitg16]

Draft202012Validator(schema, resolver=registry.resolver_with_root(resource)).iter_errors(instance)

When using code above, I get following error:

AttributeError: 'Resolver' object has no attribute 'resolving'

resolver_with_root is a great convenience method where we don't have to constantly prefix relative refs with parent id. It works fine when using resolver.lookup method directly, but error is received only during validation.

I noticed that when I change kwarg to '_resolver' instead of 'resolver', everything works fine without any errors. But it seems to be private. Is it safe to use?

Direct link to resolver_with_root in docs:
https://referencing.readthedocs.io/en/stable/api/#referencing.Registry.resolver_with_root

[nitg16]

BTW my use case is for openapi. When using '#/components/schemas/Xyz' refs, I can dump all components into registry and then use resolver_with_root. Resource id is automatically taken care of when resolving and I can directly use a relative schema like this into validation:

{'$ref': '#/components/schemas/Xyz'}

I have tested resolver_with_root.lookup recursively with a large openapi schema by only specifying relative refs and everything works correctly.

[Julian]

That argument is indeed private, and is not safe to use (and the other argument is the legacy RefResolver) -- the real fix here is to help add support for OpenAPI to referencing! Help is definitely definitely welcome on that! (The first step is to add a suite of tests to https://github.com/python-jsonschema/referencing-suite/ which cover OpenAPI's referencing behavior. I'm happy to chat further if you're interested in helping).