Improve fields annotations

[K0Te]

Hi,

I've tried checking my project and got lots of field-related warnings, most about extra parameters, duplicate parameters, etc.
I've narrowed issue down to Field signature and it's inherited classes.
Current signature is:
def __init__(self, **kwargs: Any): ...
And as example CharField:
def __init__(self, max_length: int = ..., **kwargs: Any): ...

Real Field signature has to accept all arguments as positional, and to do it's inherited classes. It might be not practical to supply more than 1-2 arguments as positional, but it's possible:

def __init__(
    self,
    verbose_name: str = ...,
    name: str = ...,
    primary_key: bool = ...,
    max_length: int = ...,
    unique: bool = ...,
    blank: bool = ...,
    null: bool = ...,
    db_index: bool = ...,
    rel: Any = ..., ## ???
    default: Any = ..., ## ???
    editable: bool = ...,
    serialize: bool = ...,
    unique_for_date: bool = ...,
    unique_for_month: bool = ...,
    unique_for_year: bool = ...,
    choices: Any = ..., # ???
    help_text: str = ...,
    db_column: Any = ..., # ???
    db_tablespace: Any = ..., # ???
    auto_created: bool = ...,
    validators: Any = ..., #???
) -> None: ...

So CharField's max_length is just one of Field parameters.

Please advise - should it be fixed directly, or is it an issue in automated code annotator ?
If it should be fixed manually - should all inherited fields duplicate Field signature and add new params, or will (new_param: Type, **kwargs) work fine ? I'm not sure if mypy will check Field signature in this case.

[mkurnikov]

Try with latest master, I've just pushed some related changes.

[K0Te]

It works fine now, thanks !
However, #6 #7 and #9 are still actual.