TypeAliasType does not respect --class-name-prefix option

[lijok]

Using Linear's schema (https://studio.apollographql.com/public/Linear-API/variant/current/schema/reference)
schema.json

Command:

datamodel-codegen \
  --input schema.graphql \
  --input-file-type graphql \
  --output models.py \
  --output-model-type pydantic_v2.BaseModel \
  --target-pydantic-version 2.11 \
  --use-annotated \
  --field-constraints \
  --snake-case-field \
  --use-serialization-alias \
  --use-schema-description \
  --graphql-no-typename  \
  --class-name-prefix Linear  \
  --enable-command-header \
  --enable-faux-immutability \
  --enable-version-header \
  --use-generic-base-class \
  --use-double-quotes

Running:

python3.13 models.py

Yields:

  File "/Users/eimantas.gecas/git/hologen-core/infrastructure/hgctl/.venv/lib/python3.13/site-packages/pydantic/_internal/_generate_schema.py", line 2227, in _apply_annotations
    schema = get_inner_schema(source_type)
  File "/Users/eimantas.gecas/git/hologen-core/infrastructure/hgctl/.venv/lib/python3.13/site-packages/pydantic/_internal/_schema_generation_shared.py", line 83, in __call__
    schema = self._handler(source_type)
  File "/Users/eimantas.gecas/git/hologen-core/infrastructure/hgctl/.venv/lib/python3.13/site-packages/pydantic/_internal/_generate_schema.py", line 2206, in inner_handler
    schema = self._generate_schema_inner(obj)
  File "/Users/eimantas.gecas/git/hologen-core/infrastructure/hgctl/.venv/lib/python3.13/site-packages/pydantic/_internal/_generate_schema.py", line 1028, in _generate_schema_inner
    return self.match_type(obj)
           ~~~~~~~~~~~~~~~^^^^^
  File "/Users/eimantas.gecas/git/hologen-core/infrastructure/hgctl/.venv/lib/python3.13/site-packages/pydantic/_internal/_generate_schema.py", line 1104, in match_type
    return self._type_alias_type_schema(obj)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^
  File "/Users/eimantas.gecas/git/hologen-core/infrastructure/hgctl/.venv/lib/python3.13/site-packages/pydantic/_internal/_generate_schema.py", line 1357, in _type_alias_type_schema
    raise PydanticUndefinedAnnotation.from_name_error(e) from e
pydantic.errors.PydanticUndefinedAnnotation: name 'AgentActivityActionContent' is not defined

For further information visit https://errors.pydantic.dev/2.12/u/undefined-annotation

Looking at the model, it appears that when the flag --class-name-prefix Linear is set, TypeAliasType does not use it.

# Content for different types of agent activities.

LinearAgentActivityContent = TypeAliasType(
    "LinearAgentActivityContent",
    Union[
        "AgentActivityActionContent",
        "AgentActivityElicitationContent",
        "AgentActivityErrorContent",
        "AgentActivityPromptContent",
        "AgentActivityResponseContent",
        "AgentActivityThoughtContent",
    ],
)

[koxudaxi]

@lijok
This issue was fixed in v0.52.2 (#2926).
Could you check if upgrading resolves it?

[lijok]

Yes, this is fixed. Thank you !