flutter json_serializable generated code analysis error error: Missing parameter type for 'e'

Question

如标题所述，生成的代码显示 'e' 错误。错误状态为 error: Missing parameter type for 'e'. 当然，如果可以修改生成的代码，我可以这样做。但是，这似乎是一个非常糟糕的先例。

生成的代码是：

RatingResponseModel(
      propertyId: json['propertyId'] as String,
      ownerId: json['ownerId'] as String,
      renterId: json['renterId'] as String,
      ratedDate: DateTime.parse(json['ratedDate'] as String),
      ratings: (json['ratings'] as List<dynamic>)
          .map((e) => RatedDimensionModel.fromJson(e as Map<String, dynamic>))
          .toList(),
    );

class 看起来像：

part 'rating_response_model.g.dart';

@JsonSerializable(explicitToJson: true)
class RatingResponseModel {
  RatingResponseModel({
    required this.propertyId,
    required this.ownerId,
    required this.renterId,
    required this.ratedDate,
    required this.ratings,
  });

  /// A necessary factory constructor for creating a new User instance
  /// from a map. Pass the map to the generated `_$MyClassNameFromJson()`
  /// constructor. The constructor is named after the source class.
  factory RatingResponseModel.fromJson(Map<String, dynamic> json) =>
      _$RatingResponseModelFromJson(json);

  /// `toJson` is the convention for a class to declare support for
  /// serialization to JSON. The implementation simply calls the private,
  /// generated helper method `_$MyClassNameToJson`.
  Map<String, dynamic> toJson() => _$RatingResponseModelToJson(this);

  final String propertyId;
  final String ownerId;
  final String renterId;
  final DateTime ratedDate;
  final List<RatedDimensionModel> ratings;
}```

The app seems to work properly, as do the unit tests - including the to/from json unit tests. Showing a syntax error in generated code is annoying. It makes me wonder if I have done something wrong. Worse, will it fail unexpectedly?

I am using json serializable: ^6.1.4 and json annotation: ^4.4.0. Flutter is 2.8.1. The ide is Intellij IDEA 2021.3.1.

Answer 1

我改了：

.map((e) =>

收件人：

.map((dynamic e) =>

而且，正如@hiashutoshsingh 所说，这解决了分析错误的问题。此解决方案的缺点是，每次 运行 构建 运行ner 时，您都需要再次更改生成的代码。