Ensure that auto_now=True fields gets updated on a update-query & add model.update_values(**) — Was: Handling modified_at (auto_now=True) with pydantic models

Hello!

How to update, for example (modified_at) field, using update model method. Example:

class User(Model):
    id = fields.IntField(pk=True)
    username = fields.CharField(max_length=50)
    created_at = fields.DatetimeField(auto_now_add=True)
    modified_at = fields.DatetimeField(auto_now=True)

UserUpdate_Pydantic = pydantic_model_creator(User, name="UserUpdate", exclude_readonly=True)```

user = UserUpdate_Pydantic(username='user_modified')
User.filter(id=user_id).update(**user.dict(exclude_unset=True))

That way, the modified_at field don't update because it is not pass to update model method

My question is: How can I update modified_at field implicitly

Start by locating the User.filter(...).update(...) path and the model update behavior shown in the example, then trace how auto_now=True fields are handled during query updates. Review the proposed update_values(**) API against the Pydantic update flow; done means the intended behavior is agreed and verified for both update paths.