✨ Add support for passing a custom SQLAlchemy type to Field() with sa_type

[maru0123-2004]

Related to #503 .

Notice;
I tested its works only in my case.

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📝 Docs preview for commit 55098b2 at: https://637da5945b0a220ff8ef4e3c--sqlmodel.netlify.app

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📝 Docs preview for commit c4c58cc at: https://6399e5912bd3820502950046--sqlmodel.netlify.app

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📝 Docs preview for commit 54d1816 at: https://639cdfbd569504009f94aa64--sqlmodel.netlify.app

[danielkza]

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.

[maru0123-2004]

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

[bkanuka]

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.

[thedamnedrhino]

@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))

[tiangolo]

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. 🤓