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to_dict() does not convert enums to strings

See original GitHub issue

As resolved in #51, python enums can be used with dataclasses-json and I have successfully tried that, using the to_json() and from_json() methods.

However, with to_dict(), enum values appear to be untouched, hence the resulting dictionary is not JSON serializable. I assume that this is not the intended behavior, as according to the API docs, to_dict() should return a JSON-compatible dict.

Issue Analytics

  • State:closed
  • Created 3 years ago
  • Reactions:2
  • Comments:7 (3 by maintainers)

github_iconTop GitHub Comments

RunOrVeithcommented, Jul 29, 2020

you have to do foo.to_dict(encode_json=True)

illeatmyhatcommented, Mar 8, 2021

I also have this issue with to_json(), which doesn’t have an encode_json parameter. What I ended up doing was

from dataclasses import dataclass, field
from dataclasses_json import DataClassJsonMixin, config
from enum import Enum
class MyEnum(Enum):
    Foo = "foo"
    Bar = "bar"

class Data(DataClassJsonMixin):
    test: MyEnum = field(metadata=config(encoder=lambda x: x.value, decoder=MyEnum))

foo = Data(MyEnum.Foo)
assert Data.from_json('{"test": "foo"}').test == MyEnum.Foo
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