Update main.py

[AlanBogarin]

Add type hint for sa_column (Column[Unknown])

[iloveitaly]

What problem does this fix? More helpful PR descriptions may help this get merged.

[AlanBogarin]

What problem does this fix? More helpful PR descriptions may help this get merged.

Type checker throw partially unknown error when used in strict mode (Pylance)
When I locally edited that line, everything was correct

origin: sqlmodel.main.Field
info: Column expected an argument

339 |    sa_column: Union[Column, UndefinedType] = Undefined,  # type: ignore

proposed change

339 |    sa_column: Union[Column[Any], UndefinedType] = Undefined,

If you want to see it yourself (be sure to set the type checker to strict)

import sqlmodel

class TestModel(sqlmodel.SQLModel, table=True):
    value: list[int] = sqlmodel.Field(sa_column=sqlmodel.Column(sqlmodel.JSON))

There is a better change, but it is not possible because Column was defined in sqlalchemy

# sqlalchemy.sql.schema
113 |    _T = TypeVar("_T", bound="Any", default="Any")  # python >= 3.13