Alembic not creating index with BigInteger sa_column type

[robcxyz]

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• I already checked if it is not related to SQLModel but to SQLAlchemy.

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Example Code

from sqlalchemy import BigInteger
from sqlmodel import Field, SQLModel, Column

class Thing(SQLModel, table=True):
    id: int = Field(None, primary_key=True)
    not_indexed_in_alembic: int = Field(None, index=True, sa_column=Column(BigInteger()))
    is_indexed_in_alembic: int = Field(None, index=True)

Description

Please excuse me if this is not a sqlmodel question but more to do with alembic, but figured I'd post it here first as it relates to issue #191, specifically this comment.

When I am using a custom sqlalchemy type BigInteger, Alembic is not creating an index for me on that column.

To reproduce:

1. Import the table into alembic's env.py
2. Run alembic revision --autogenerate -m "testing" && alembic upgrade head
3. No index is created for the BigInteger column

Also checked this with older versions of sqlmodel and still got same issue.

Operating System

Linux

Operating System Details

Ubuntu

SQLModel Version

v0.8.0

Python Version

3.10

Additional Context

Alembic is latest version (1.9.3)

[jochman]

joining, same problem