8000 `type[Self]` raises TypeError in pydantic-core · Issue #10618 · pydantic/pydantic · GitHub
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type[Self] raises TypeError in pydantic-core #10618

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kc0506 opened this issue Oct 14, 2024 · 0 comments · Fixed by #10621
Closed
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type[Self] raises TypeError in pydantic-core #10618

kc0506 opened this issue Oct 14, 2024 · 0 comments · Fixed by #10621
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bug V2 Bug related to Pydantic V2 pending Is unconfirmed

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@kc0506
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kc0506 commented Oct 14, 2024

Initial Checks

  • I confirm that I'm using Pydantic V2

Description

Traceback

Traceback (most recent call last):
  File "C:\Users\kchon\OneDrive\Desktop\pydantic\new.py", line 7, in <module>
    class A(BaseModel):
  File "C:\Users\kchon\OneDrive\Desktop\pydantic\pydantic\_internal\_model_construction.py", line 227, in __new__
    complete_model_class(
  File "C:\Users\kchon\OneDrive\Desktop\pydantic\pydantic\_internal\_model_construction.py", line 679, in complete_model_class
    cls.__pydantic_validator__ = create_schema_validator(
                                 ^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\kchon\OneDrive\Desktop\pydantic\pydantic\plugin\_schema_validator.py", line 50, in create_schema_validator
    return SchemaValidator(schema, config)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
pydantic_core._pydantic_core.SchemaError: Error building "model" validator:
  SchemaError: Error building "model-fields" validator:
  SchemaError: Field "self_field":
  SchemaError: Error building "is-subclass" validator:
  TypeError: '_SpecialForm' object cannot be converted to 'PyType'

Example Code

from pydantic import BaseModel

class A(BaseModel):
    self_field: type[Self]

Python, Pydantic & OS Version

pydantic version: 2.10.0a1                                                                                                         
        pydantic-core version: 2.24.0
          pydantic-core build: profile=release pgo=false
                 install path: C:\Users\kchon\OneDrive\Desktop\pydantic\pydantic
               python version: 3.12.1 (tags/v3.12.1:2305ca5, Dec  7 2023, 22:03:25) [MSC v.1937 64 bit (AMD64)]
                     platform: Windows-11-10.0.22631-SP0
             related packages: mypy-1.1.1 pydantic-extra-types-2.9.0 pydantic-settings-2.5.2 typing_extensions-4.12.2
                       commit: b8ef9034
@kc0506 kc0506 added bug V2 Bug related to Pydantic V2 pending Is unconfirmed labels Oct 14, 2024
@kc0506 kc0506 changed the title type[Self] cause TypeError in pydantic-core type[Self] raises TypeError in pydantic-core Oct 14, 2024
@kc0506 kc0506 mentioned this issue Oct 14, 2024
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Support usage of type with typing.Self and type aliases kc0506/pydantic
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