Question 307055 in Flutter Question posted in
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How to decode this json data in flutter?

{
    "status": "success",
    "errors": null,
    "message": "Records Found successfully.",
    "data": [
        {
            "id": 2,
            "department_id": 1,
            "permissions": "{"eventStatus":"1","dptStatus":"1","empStatus":"1","policyStatus":"1","openingStatus":"1","birthdayStatus":"1","hrdStatus":"1","supportStatus":"1","libraryStatus":"1","exemptionStatus":"1","settingStatus":"1","assetsStatus":"1"}"
        }
    ]
}

How to convert this json to dart model class?

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2

Answers


  1. 0

    You either do it on your own, with jsonDecode() and Map, or use the json_serializable package.

    Using jsonDecode()

    1. deserialize the json with jsonDecode: final jsonMap = jsonDecode(jsonString) as Map<String, dynamic>;
    2. create the class with a constructor that takes in the map
    class ResponseModel {
  final String status;
  // Don't know what this looks like
  final Object errors;
  final String message;
  final DataModel data;

  ResponseModel(this.status, this.errors);

  ResponseModel.fromJson(Map<String, dynamic> json)
      : status = json['status'] as String,
        errors = json['errors'] as Object,
        message = json['message'] as String,
        data = DataModel.fromJson(json['data']);

  // optionally a toJson() as well
  Map<String, dynamic> toJson() => {
    'status': status,
    'errors': errors,
    'message': message,
    'data': data.toJson()
  };
}

class DataModel {
  final String id;
  final int department_id;
  final String permissions;

  DataModel(this.status, this.errors);

  DataModel.fromJson(Map<String, dynamic> json)
      : id = json['id'] as String,
        department_id = json['department_id'] as int,
        permissions = json['permissions'] as String

  // optionally a toJson() as well
  Map<String, dynamic> toJson() => {
    'id': id,
    'department_id': department_id,
    'permissions': permissions
  };
}

    Using the json_serializable package

    1. add the dependencies with: flutter pub add json_annotation dev:build_runner dev:json_serializable
    2. create the class
    class ResponseModel {
  final String status;
  final Object errors;
  // ... rest of the fields

  ResponseModel({required this.status, required this.errors});

  // these two methods will show an error, they will be generated later
  factory ResponseModel.fromJson(Map<String, dynamic> json) => _$ResponseModelFromJson(json);

  Map<String, dynamic> toJson() => _$ResponseModelToJson(this);
}
    1. run build_runner: dart run build_runner build
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  2. 0

    You can use this library to decode:

    import 'dart:convert';

    It has a method

    json.decode()

    This will decode the josnData.

    You can also explore this website to make a model class.

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