[BUG] ref to a property in the current component schema does not work

Created by: spacether

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
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Description

ref to a property in the current component schema does not work This came up while writing this unit test PR: https://github.com/OpenAPITools/openapi-generator/pull/12619

openapi-generator version

6.0.0

OpenAPI declaration file content or url

openapi: 3.0.3
info:
  title: openapi 3.0.3 sample spec
  description: sample spec for testing openapi functionality, built from json schema
    tests for draft6
  version: 0.0.1
paths: {}
components:
  schemas:
    PropertyRefsAdjacentProperty:
      properties:
        foo:
          type: integer
        bar:
          $ref: '#/components/schemas/PropertyRefsAdjacentProperty/properties/foo'

Generation Details

Using python-experimental client generator

Steps to reproduce

Generate a client spec with python-experimental and notice that the type for PropertyRefsAdjacentProperty.bar is not correct.

Generated code:

class PropertyRefsAdjacentProperty(
    AnyTypeSchema
):
    """NOTE: This class is auto generated by OpenAPI Generator.
    Ref: https://openapi-generator.tech

    Do not edit the class manually.
    """
    foo = IntSchema

    @classmethod
    @property
    def bar(cls) -> typing.Type['Foo']:
        return Foo

    def __new__(
        cls,
        *args: typing.Union[dict, frozendict, str, date, datetime, int, float, decimal.Decimal, None, list, tuple, bytes],
        foo: typing.Union[foo, Unset] = unset,
        bar: typing.Union['Foo', Unset] = unset,
        _configuration: typing.Optional[Configuration] = None,
        **kwargs: typing.Type[Schema],
    ) -> 'PropertyRefsAdjacentProperty':
        return super().__new__(
            cls,
            *args,
            foo=foo,
            bar=bar,
            _configuration=_configuration,
            **kwargs,
        )

from unit_test_api.model.foo import Foo

When I would expect:

class PropertyRefsAdjacentProperty(
    AnyTypeSchema
):
    """NOTE: This class is auto generated by OpenAPI Generator.
    Ref: https://openapi-generator.tech

    Do not edit the class manually.
    """
    foo = IntSchema

    bar = foo

    def __new__(
        cls,
        *args: typing.Union[dict, frozendict, str, date, datetime, int, float, decimal.Decimal, None, list, tuple, bytes],
        foo: typing.Union[foo, Unset] = unset,
        bar: typing.Union['Foo', Unset] = unset,
        _configuration: typing.Optional[Configuration] = None,
        **kwargs: typing.Type[Schema],
    ) -> 'PropertyRefsAdjacentProperty':
        return super().__new__(
            cls,
            *args,
            foo=foo,
            bar=bar,
            _configuration=_configuration,
            **kwargs,
        )

Related issues/PRs

N/A

Suggest a fix

One needs to add code that:

• detects references to other locations in the self schema
• returns the correct class in that property
• does not generate an import for that property