@Bind.query('--') to Enum gives "No static parse method error" while static parse method is defined in Extension on that Enum.

[akasher]

enum Roles {
  owner,
  admin,
  user,
}

extension rolesParser on Roles {
  static Roles parse(String value) {
    final Roles role = tryParse(value);
    if (role != null)
      return role;
  }
  static Roles tryParse(String input) {
    final String value = input.trim();
    return Roles.values.firstWhere((element) => element.toString().split('.')[1].toUpperCase() == value.toUpperCase());
  }
}

Bad state: Bad state: Invalid binding 'role' on 'UsersController.getUsers': Parameter type does not implement static parse method.
**** Stacktrace

• #0 _enforceTypeCanBeParsedFromString (package:aqueduct/src/runtime/resource_controller_impl.dart:313:5)
• Build authentication adapter #1 ResourceControllerRuntimeImpl.getParameterForVariable (package:aqueduct/src/runtime/resource_controller_impl.dart:203:15)
• Ensure application startup completes across isolates #2 ResourceControllerRuntimeImpl.getOperationForMethod. (package:aqueduct/src/runtime/resource_controller_impl.dart:277:26)
• Documentation for application, controllers, router #3 MappedIterator.moveNext (dart:_internal/iterable.dart:395:20)
• Allow resource controller endpoints to take query params as optional arguments #4 new List.from (dart:core-patch/array_patch.dart:47:19)
• Ensure that path parameters from the router are parsed into the type the handler expects #5 Iterable.toList (dart:core/iterable.dart:400:12)
• Create API documentation intermediate file format #6 ResourceControllerRuntimeImpl.getOperationForMethod (package:aqueduct/src/runtime/resource_controller_impl.dart:281:14)
• Integrate code coverage tool for tests #7 MappedIterator.moveNext (dart:_internal/iterable.dart:395:20)
• Create Postman file from intermediate documentation #8 new List.from (dart:core-patch/array_patch.dart:47:19)
• Create Swagger API specification generated from intermediate format #9 Iterable.toList (dart:core/iterable.dart:400:12)
• Write guide for monadart  #10 new ResourceControllerRuntimeImpl (package:aqueduct/src/runtime/resource_controller_impl.dart:31:10)
• Allow closures or find better way to add context to REsourceRequests in ApplicationPipeline #11 new ControllerRuntimeImpl (package:aqueduct/src/runtime/impl.dart:146:28)
• Allow HttpController methods to parse path better #12 AqueductCompiler.compile. (package:aqueduct/src/runtime/compiler.dart:21:46)
• Add RouteMatch class to encapsulate information from a Router match #13 MappedListIterable.elementAt (dart:_internal/iterable.dart:417:31)
• A big cleanup #14 ListIterator.moveNext (dart:_internal/iterable.dart:346:26)
• Fixed null pipelineOptions bug #15 MapMixin.addEntries (dart:collection/maps.dart:172:23)
• Cleaning up some stuff #16 AqueductCompiler.compile (package:aqueduct/src/runtime/compiler.dart:20:7)
• Make Application generic #17 new MirrorContext._. (package:runtime/src/mirror_context.dart:13:34)
• Added generics to app #18 List.forEach (dart:core-patch/growable_array.dart:282:8)
• Make it so JSONTestRequest can handle lists #19 new MirrorContext._ (package:runtime/src/mirror_context.dart:12:15)
• Change /auth/token/refresh to /auth/token and use grant_type #20 instance (package:runtime/src/mirror_context.dart:7:41)
• Fixed issue #20. Added x-www-form-urlencoded ContentType to default o… #21 instance (package:runtime/src/mirror_context.dart:7:16)
• Jc/responseencoder #22 RuntimeContext.current (package:runtime/src/context.dart:10:33)
• Jc/document #23 GetChannelExecutable.execute (data:application/dart:14:199)
• Jc/testing #24 main (data:application/dart:10:35)
• Allow lists to be included in input JSON, but ignore when trying to i… #25 _startIsolate. (dart:isolate-patch/isolate_patch.dart:297:32)
• Populate sub-objects in fetch request #26 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:168:12)

---

[Reductions]

Please when you post code use a "code block".

[Reductions]

enum Roles {
  owner,
  admin,
  user,
}

extension RolesParser on Roles {
  // You can not add static methods extension. The code below allows you do this `RolesParser.parse()` not `Roles.parse()`  
  static Roles parse(String value) {
    final Roles role = tryParse(value);
    if (role != null) return role;
  }

  static Roles tryParse(String input) {
    final String value = input.trim();
    return Roles.values.firstWhere((element) =>
        element.toString().split('.')[1].toUpperCase() == value.toUpperCase());
  }
}

[Reductions]

What I would do is either bind to a string and then parse it or do something like:

class RoleBind {
  RoleBind._(this.value);

  final Role value;

  static RoleBind parse(String input) {
    final result = RoleBind.tryParse(input);
    if (result != null) {
      return result;
    }
    throw 'Cound not parse Role';
  }

  static RoleBind tryParse(String input) {
    final value = input.trim();
    final eValue = Role.values.firstWhere((role) =>
      role.toString().split('.').last.toUppperCase() == value.toUpperCase());
    if(eValue != null) {
        return RoleBind._(eValue);
    }
    return null;
  }
}

[Reductions]

I would also recommend renaming Roles to Role as it is more natural to say Role.user then Roles.user.

[akasher]

Please when you post code use a "code block".
I apologize, I have done the needful. Thanks.

[akasher]

@Reductions , your advice to make another class called RoleBind worked like a charm. Thanks a ton.