flutterinheritancedartjsonserializer

flutter dart JsonSerializable with inherited class


I have the following two classes where one is extending from the other like this :

@JsonSerializable(nullable: true)
class Response {
  final String responseCode;
  final String responseMessage;
  final String errorLog;
  Response({this.errorLog, this.responseCode, this.responseMessage});
  factory Response.fromJson(Map<String, dynamic> json) =>
      _$ResponseFromJson(json);
}

.........................................................

 @JsonSerializable(nullable: false)
class Verify extends Response {
  Data data;
  Verify({
    this.data,
  });
  factory Verify.fromJson(Map<String, dynamic> json) => _$VerifyFromJson(json);
  Map<String, dynamic> toJson() => _$VerifyToJson(this);
}

and whenever I'm trying to read response class properties from Verify class, it's always null.

so please how to achieve this?


Solution

  • this one I have solved by passing the parameters to super in verify class constructor like this

    @JsonSerializable()
    class VerifyResponse extends Response {
      Data data;
    
      VerifyResponse({
        this.data,
        String responseCode,
        String responseMessage,
      }) : super(responseCode: responseCode, responseMessage: responseMessage);
    
      factory VerifyResponse.fromJson(Map<String, dynamic> json) =>
          _$VerifyResponseFromJson(json);
    
      Map<String, dynamic> toJson() => _$VerifyResponseToJson(this);
    }
    

    and for the response class it remains the same

    @JsonSerializable()
    class Response {
      final String responseCode;
      final String responseMessage;
    
      Response({this.responseCode, this.responseMessage});
    
      factory Response.fromJson(Map<String, dynamic> json) =>
          _$ResponseFromJson(json);
    }
    

    it's a bit annoying but it's what it's.