Serialization strategy for TypeVar does not work in BaseConfig

[timrulebosch]

I find when I define a TypeVar variables of that type are always serialized with the first type listed in the TypeVar definition.

In an attempt to fix that I tired to set a global serialization strategy, however that strategy was never selected, rather, the selection seems to be also based on the first type listed in the TypeVar. Quite a bit of the code in metaprograming.py seems to handle a TypeVar so I wonder if I have something else missing?

The basic code is:

Numeric = TypeVar('Numeric', float, int)  # <== here float is first in the list, seems to be selected as the key for serialization strategy.

class NumericStrategy(SerializationStrategy):
    def serialize(self, value):
        return int(value)

    def deserialize(self, value):
        return int(value)

@dataclass
class foo(DataClassYAMLMixin):
    bar: Numeric = 1
    class Config(BaseConfig):
            serialization_strategy = {
                Numeric: NumericStrategy(),  # <== this is the line I think should activate the strategy
                int: NumericStrategy(),
                #float: NumericStrategy(),  # <== it seems that only this line would activate the strategy
            }

[Fatal1ty]

Hi @timrulebosch

Seems like a bug, thank you for spotting it! I'll see what I can do with it.

[Fatal1ty]

@timrulebosch I fixed it in a develop branch. You can check it and give me a feedback.

[timrulebosch]

Works! Very nice.

Thanks.