Alias option won't work with slots enabled

[amirotin]

Hi!
Just noticed that if i enable slots (to reduce memory usage) alias option doesn't work

@dataclass(slots=True)
class DataClass(DataClassJSONMixin):
    a: int = field(metadata=field_options(alias="FieldA"))
    b: int = field(metadata=field_options(alias="#invalid"))

x = DataClass.from_dict({"FieldA": 1, "#invalid": 2})  # DataClass(a=1, b=2)
print(x)
x.to_dict()  # {"a": 1, "b": 2}  # no aliases on serialization by default

got error

Traceback (most recent call last):
  File "test.py", line 9, in <module>
    x = DataClass.from_dict({"FieldA": 1, "#invalid": 2})  # DataClass(a=1, b=2)
  File "<string>", line 26, in from_dict
TypeError: DataClass.__init__() missing 2 required positional arguments: 'a' and 'b'

don't know if there is some workaround, probably better to mention that in docs

[Fatal1ty]

Seems like a bug, thank you for spotting it! I'll see how it could be fixed.

[Fatal1ty]

I fixed it here, so it's ready to be included in the next release.

[Fatal1ty]

Hi @amirotin

It it's fixed in 3.0.