Convert JSON into POJO (Object) similar to android in Flutter

Question

I\'m just trying to find a way to convert a json response (from a REST API) into POJO (As used in android) so that I can use the received data into my application as using M

Answer 1

json_serializable isn't that well documented, but it does exactly what you want, is easier to use and requires less boilerplate than built_value, especially when it comes to arrays.

import 'package:json_annotation/json_annotation.dart';
import 'dart:convert';

part 'school.g.dart';

@JsonSerializable()
class School {
  final String name;

  final int maxStudentCount;

  final List students;

  School(this.name, this.maxStudentCount, this.students);
  factory School.fromJson(Map json) => _$SchoolFromJson(json);
  Map toJson() => _$SchoolToJson(this);
}

@JsonSerializable()
class Student {
  final String name;

  final DateTime birthDate;

  Student({this.name, this.birthDate});
  factory Student.fromJson(Map json) => _$StudentFromJson(json);
  Map toJson() => _$StudentToJson(this);
}

test() {
  String jsonString = '''{
   "name":"Trump University",
   "maxStudentCount":9999,
   "students":[
      {
         "name":"Peter Parker",
         "birthDate":"1999-01-01T00:00:00.000Z"
      }
   ]
  }''';

  final decodedJson = json.decode(jsonString);

  final school = School.fromJson(decodedJson);

  assert(school.students.length == 1);
}

It also supports enum serialization.

To generate the serialization code, run:

flutter packages pub run build_runner build