Error when running Config example

[tobiascadee]

What's the issue?

I'm trying to define a Config class and using this but even the example provided in the docs gives an error.

class MyAssetConfig(Config):
    a_str: str

@asset
def my_asset(config: MyAssetConfig):
    assert config.a_str == "foo"

materialize(
    [my_asset],
    run_config=RunConfig(
        ops={"my_asset": MyAssetConfig(a_str="foo")}
    )
)

gives:

Traceback (most recent call last):
  File "/Users/tobiascadee/Documents/Ticketswap/Github/data-transformations/.venv/lib/python3.11/site-packages/dagster/_config/pythonic_config/conversion_utils.py", line 333, in infer_schema_from_config_annotation
    inner_config_type = _config_type_for_type_on_pydantic_field(model_cls)
                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tobiascadee/Documents/Ticketswap/Github/data-transformations/.venv/lib/python3.11/site-packages/dagster/_config/pythonic_config/conversion_utils.py", line 215, in _config_type_for_type_on_pydantic_field
    return convert_potential_field(potential_dagster_type).config_type
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tobiascadee/Documents/Ticketswap/Github/data-transformations/.venv/lib/python3.11/site-packages/dagster/_config/field_utils.py", line 432, in convert_potential_field
    return _convert_potential_field(potential_field, potential_field, [])
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tobiascadee/Documents/Ticketswap/Github/data-transformations/.venv/lib/python3.11/site-packages/dagster/_config/field_utils.py", line 465, in _convert_potential_field
    raise DagsterInvalidConfigDefinitionError(original_root, potential_field, stack)
dagster._core.errors.DagsterInvalidConfigDefinitionError: Error defining config. Original value passed: 'MyAssetConfig'. 'MyAssetConfig' cannot be resolved.
This value can be a:
    - Field
    - Python primitive types that resolve to dagster config types
        - int, float, bool, str, list.
    - A dagster config type: Int, Float, Bool, Array, Optional, Selector, Shape, Permissive, Map
    - A bare python dictionary, which is wrapped in Field(Shape(...)). Any values
      in the dictionary get resolved by the same rules, recursively.
    - A python list with a single entry that can resolve to a type, e.g. [int]


During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/tobiascadee/Documents/Ticketswap/Github/data-transformations/dagster_etl/test.py", line 26, in <module>
    @asset
     ^^^^^
  File "/Users/tobiascadee/Documents/Ticketswap/Github/data-transformations/.venv/lib/python3.11/site-packages/dagster/_core/decorator_utils.py", line 203, in wrapped_with_pre_call_fn
    return fn(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^
  File "/Users/tobiascadee/Documents/Ticketswap/Github/data-transformations/.venv/lib/python3.11/site-packages/dagster/_core/decorator_utils.py", line 203, in wrapped_with_pre_call_fn
    return fn(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^
  File "/Users/tobiascadee/Documents/Ticketswap/Github/data-transformations/.venv/lib/python3.11/site-packages/dagster/_core/decorator_utils.py", line 203, in wrapped_with_pre_call_fn
    return fn(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^
  [Previous line repeated 6 more times]
  File "/Users/tobiascadee/Documents/Ticketswap/Github/data-transformations/.venv/lib/python3.11/site-packages/dagster/_core/definitions/decorators/asset_decorator.py", line 327, in asset
    return create_assets_def_from_fn_and_decorator_args(args, compute_fn)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tobiascadee/Documents/Ticketswap/Github/data-transformations/.venv/lib/python3.11/site-packages/dagster/_core/definitions/decorators/asset_decorator.py", line 532, in create_assets_def_from_fn_and_decorator_args
    return builder.create_assets_definition()
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tobiascadee/Documents/Ticketswap/Github/data-transformations/.venv/lib/python3.11/site-packages/dagster/_core/definitions/decorators/decorator_assets_definition_builder.py", line 565, in create_assets_definition
    node_def=self.create_op_definition(),
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tobiascadee/Documents/Ticketswap/Github/data-transformations/.venv/lib/python3.11/site-packages/dagster/_core/definitions/decorators/decorator_assets_definition_builder.py", line 546, in create_op_definition
    return _Op(
           ^^^^
  File "/Users/tobiascadee/Documents/Ticketswap/Github/data-transformations/.venv/lib/python3.11/site-packages/dagster/_core/definitions/decorators/op_decorator.py", line 104, in __call__
    self.config_schema = infer_schema_from_config_annotation(
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tobiascadee/Documents/Ticketswap/Github/data-transformations/.venv/lib/python3.11/site-packages/dagster/_config/pythonic_config/conversion_utils.py", line 335, in infer_schema_from_config_annotation
    raise DagsterInvalidPythonicConfigDefinitionError(
dagster._core.errors.DagsterInvalidPythonicConfigDefinitionError: 
Error defining Dagster config class.
Unable to resolve config type 'MyAssetConfig' to a supported Dagster config type.


This config type can be a:
    - Python primitive type
        - int, float, bool, str, list
    - A Python Dict or List type containing other valid types
    - Custom data classes extending dagster.Config
    - A Pydantic discriminated union type (https://docs.pydantic.dev/usage/types/#discriminated-unions-aka-tagged-unions)

What did you expect to happen?

No error given.

How to reproduce?

I imagine there might be something wrong on my end but its just the config example and then run it.

Dagster version

1.9.1

Deployment type

None

Deployment details

No response

Additional information

No response

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