Pyright: Mapped is considered unhashable

[mrcljx]

Describe the bug

I'm getting a Type "Mapped[int]" is not hashable error in Pyright when trying to use a column in a dictionary.

Expected behavior

Pyright should not report an error.

To Reproduce

from sqlalchemy import Column, Integer
from sqlalchemy.orm import Mapped

class MyModel:
    id: Mapped[int] = Column("id", Integer, primary_key=True)

data = {MyModel.id: 1}

Error

/path/to/file.py
  /path/to/file.py:9:9 - error: Dictionary key must be hashable
   Type "Mapped[int]" is not hashable (reportGeneralTypeIssues)

Versions.

• OS: macOS
• Python: 3.10
• SQLAlchemy: 1.4.48
• mypy: None (Pyright: 1.1.343)
• SQLAlchemy2-stubs: 0.0.2a37

Additional context

This is caused by the lack of __hash__ in ColumnOperators.

The issue does not appear when using SA because __hash__ has been added there.