import asyncio
from tortoise import fields, Tortoise, Model
from enum import Enum

class MyModel(Model):
    name = fields.TextField()

class MyEnum(str, Enum):
    A = "a"

async def do():
    await Tortoise.init(db_url="sqlite://:memory:", modules={"models": ["__main__"]})
    qs = MyModel.filter(name=MyEnum.A)
    qs._make_query()
    print(qs.query)
    # expected   SELECT "id","name" FROM "mymodel" WHERE "name"='a'
    # actual     SELECT "id","name" FROM "mymodel" WHERE "name"=a

asyncio.run(do())