[Feature Request] Case insensitive parsing of enums

[orestesgaolin]

Due to inconsistencies in the data sources my app needs to handle various variants of enum representations e.g.:

{
  "myEnum": "VALUE"
}

{
  "myEnum": "value"
}

I wish there was a way to tell json_serializable to ignore the case differences and parse these values to MyEnum.value.

The API I would love to see could be:

In Dart:

JsonKey(ignoreCase: true)
final MyEnum myEnum;

and the generated code would then call toString().toLowerCase() on the value being passed to enumDecodeNullable:

      $checkedConvert(
              json,
              'myEnum',
              (v) => _$enumDecodeNullable(_$MyEnumEnumMap, v?.toString().toLowerCase(),
                  unknownValue: MyEnum.unknown)) ??
          MyEnum.unknown,

[bruno-m-antunes-alb]

Any news on this?

[kevmoo]

Turns out this is more gnarly to do that you'd think. It's in my backlog, but not super high priority.

Friendly reminder: I'm the only maintainer of this package – and purely in my free time.

[romk1n]

it would be great to support this even for keys

[t-beckmann]

This could be realized by supporting the more general feature #1036.

[kevmoo]

@t-beckmann – you can also do this now by just adding toJson/fromJson to an enum class.

[t-beckmann]

Should cover most cases, except for enums one can not modify for some reason, but that's rare. Could be closed...?