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I just started trying out SQLModel and hit the issue where I can't use a JSON sqlalchemy type, so fixing and merging this PR would be very useufl.

Thank you...!
Is there any error...?

FWIW I personally prefer some of the solutions outlined in #503 (adding an override) rather than just adding sa_type. The ideas in #503 have the potential to be more general and helpful in more situations.

@danielkza you can do something like this:

from sqlmodel import Column, JSON

class Model(SQLModel):
    # -- adapt field type according to your needs
    subject_sids: dict[str, str] = Field(sa_column=Column(JSON))

Great, thank you @maru0123-2004! 🚀 🍰

This will be available in the next version, 0.0.11 🎉

I will document it (and add tests for it) soon, but later, after migrating to SQLAlchemy 2.0 and Pydantic 2.0. 🤓