flutter_annotation_json

Description:

flutter annotation json

flutter_annotation_json #
JSON to Model based on annotations, type safe.
Example #
import 'package:flutter_annotation_json/flutter_annotation_json.dart';

part 'user.json.dart';

@JsonObject()
class UserInfo {
final String name;
final int age;
final double height;
final bool isVip;
final DateTime lastLogin;
final List<String> photos;
final UserLevel level;
final String? bio;
final AddressInfo? addressInfo;

UserInfo({required this.name,
required this.age,
required this.height,
required this.isVip,
required this.lastLogin,
required this.photos,
required this.level,
this.bio,
this.addressInfo,
required this.session});

factory UserInfo.fromJson(Map<String, dynamic> json) =>
_$UserInfoFromJson(json);
}

@JsonObject()
class AddressInfo {
final String province;
final String city;
final String area;

AddressInfo({required this.province, required this.city, required this.area});

factory AddressInfo.fromJson(Map<String, dynamic> json) =>
_$AddressInfoFromJson(json);
}
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Optional Method

toJson

Map<String, dynamic> toJson() => _$AddressInfoToJson(this);
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copyWith

AddressInfo copyWith({String? province, String? city, String? area}) =>
_$AddressInfoCopyWith(this,
province: province, city: city, area: area
);
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Use Enum
part 'user.enum.dart';

@JsonEnum('vip')
enum UserLevel {
@EnumValue('normal')
normal,
@EnumValue('vip')
vip,
@EnumValue('svip')
svip
}

extension UserLevelValues on UserLevel {
String get value => _$getValueForUserLevel(this);
}
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Custom Encode&Decode #
dynamic durationEncode(dynamic value) {
return (value as Duration).inMilliseconds;
}

Duration durationDecode(dynamic value) {
return Duration(milliseconds: value);
}

@JsonField(encoder: durationEncode, decoder: durationDecode)
final Duration session;
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