apn_json2model 2.3.0
apn_json2model: ^2.3.0 copied to clipboard

Generate model class from Json file. Fork of json_to_model.

apn_json2model Pub Version #

Command line tool for generating Dart models (json_serializable) from Json file.

inspired by json_model.

based of the json_to_model

Contents #

Features #

FeatureStatus
Null safety
toJson/fromJson
immutable classes
copyWith generation
clone and deepclone
nested json classes
enum support

Installation #

on pubspec.yaml

dev_dependencies:
  apn_json2model: ^2.2.0

install using pub get command or if you using dart vscode/android studio, you can use install option.

What does this library do #

Command line tool to convert .json files into immutable .dart models.

Get started #

The command will run through your json files and find possible type, variable name, import uri, decorator and class name, and will write it into the templates.

Create/copy .json files into ./jsons/(default) on root of your project, and run flutter pub run apn_json2model.

Examples #

Input Consider this files named product.json and employee.json

product.json

{
  "id": "123",
  "caseId?": "123",
  "startDate?": "2020-08-08",
  "endDate?": "2020-10-10",
  "placementDescription?": "Description string"
}

eployee.json

{
  "id": "123",
  "displayName?": "Jan Jansen",
  "@ignore products?": "$[]product"
}

Output This will generate this product.dart and employee.dart

product.dart

import 'package:flutter/foundation.dart';

@immutable
class Product {
  
  const Product({
    required this.id,
    this.caseId,
    this.startDate,
    this.endDate,
    this.placementDescription,
  });

  final String id;
  final String? caseId;
  final String? startDate;
  final String? endDate;
  final String? placementDescription;

  factory Product.fromJson(Map<String,dynamic> json) => Product(
    id: json['id'] as String,
    caseId: json['caseId'] != null ? json['caseId'] as String : null,
    startDate: json['startDate'] != null ? json['startDate'] as String : null,
    endDate: json['endDate'] != null ? json['endDate'] as String : null,
    placementDescription: json['placementDescription'] != null ? json['placementDescription'] as String : null
  );
  
  Map<String, dynamic> toJson() => {
    'id': id,
    'caseId': caseId,
    'startDate': startDate,
    'endDate': endDate,
    'placementDescription': placementDescription
  };

  Product clone() => Product(
    id: id,
    caseId: caseId,
    startDate: startDate,
    endDate: endDate,
    placementDescription: placementDescription
  );

    
  Product copyWith({
    String? id,
    String? caseId,
    String? startDate,
    String? endDate,
    String? placementDescription
  }) => Product(
    id: id ?? this.id,
    caseId: caseId ?? this.caseId,
    startDate: startDate ?? this.startDate,
    endDate: endDate ?? this.endDate,
    placementDescription: placementDescription ?? this.placementDescription,
  );  

  @override
  bool operator ==(Object other) => identical(this, other) 
    || other is Product && id == other.id && caseId == other.caseId && startDate == other.startDate && endDate == other.endDate && placementDescription == other.placementDescription;

  @override
  int get hashCode => id.hashCode ^ caseId.hashCode ^ startDate.hashCode ^ endDate.hashCode ^ placementDescription.hashCode;
}

eployee.dart

import 'package:flutter/foundation.dart';
import 'product.dart';

@immutable
class Employee {

  const Employee({
    required this.id,
    this.displayName,
    this.products,
  });

  final String id;
  final String? displayName;
  final List<Product>? products;

  factory Employee.fromJson(Map<String,dynamic> json) => Employee(
    id: json['id'] as String,
    displayName: json['displayName'] != null ? json['displayName'] as String : null
  );

  Map<String, dynamic> toJson() => {
    'id': id,
    'displayName': displayName
  };

  Employee clone() => Employee(
    id: id,
    displayName: displayName,
    products: products?.map((e) => e.clone()).toList()
  );


  Employee copyWith({
    String? id,
    String? displayName,
    List<Product>? products
  }) => Employee(
    id: id ?? this.id,
    displayName: displayName ?? this.displayName,
    products: products ?? this.products,
  );

  @override
  bool operator ==(Object other) => identical(this, other)
    || other is Employee && id == other.id
    && displayName == other.displayName
    && products == other.products;

  @override
  int get hashCode => id.hashCode ^
    displayName.hashCode ^
    products.hashCode;
}

Input Consider this file named location.json

{
    "locationId?": 93,
    "locationTypeId?": "1234",
    "updatedAt": "@datetime",
    "name?": "Lunet 10a, Veenendaal",
    "confidential?": false,
    "locationType?": "@enum:INSIDE,OUTSIDE,CLIENT,HOME,ROOM,UNKNOWN",
    "point?": {
        "longitude": 58.1234,
        "latitude": 12.123
    }
}

Output This will generate this location.dart

import 'package:flutter/foundation.dart';

@immutable
class Location {

  const Location({
    this.locationId,
    this.locationTypeId,
    required this.updatedAt,
    this.name,
    this.confidential,
    this.locationType,
    this.point,
  });

  final int? locationId;
  final String? locationTypeId;
  final DateTime updatedAt;
  final String? name;
  final bool? confidential;
  LocationLocationTypeEnum
    get locationLocationTypeEnum => _locationLocationTypeEnumValues.map[locationType]!;
  final String? locationType;
  final Point? point;

  factory Location.fromJson(Map<String,dynamic> json) => Location(
    locationId: json['locationId'] != null ? json['locationId'] as int : null,
    locationTypeId: json['locationTypeId'] != null ? json['locationTypeId'] as String : null,
    updatedAt: DateTime.parse(json['updatedAt'] as String),
    name: json['name'] != null ? json['name'] as String : null,
    confidential: json['confidential'] != null ? json['confidential'] as bool : null,
    locationType: json['locationType'] != null ? json['locationType'] as String : null,
    point: json['point'] != null ? Point.fromJson(json['point'] as Map<String, dynamic>) : null
  );

  Map<String, dynamic> toJson() => {
    'locationId': locationId,
    'locationTypeId': locationTypeId,
    'updatedAt': updatedAt.toIso8601String(),
    'name': name,
    'confidential': confidential,
    'locationType': _locationLocationTypeEnumValues.reverse[locationType],
    'point': point?.toJson()
  };

  Location clone() => Location(
    locationId: locationId,
    locationTypeId: locationTypeId,
    updatedAt: updatedAt,
    name: name,
    confidential: confidential,
    locationType: locationType,
    point: point?.clone()
  );

  Location copyWith({
    int? locationId,
    String? locationTypeId,
    DateTime? updatedAt,
    String? name,
    bool? confidential,
    String? locationType,
    Point? point
  }) => Location(
    locationId: locationId ?? this.locationId,
    locationTypeId: locationTypeId ?? this.locationTypeId,
    updatedAt: updatedAt ?? this.updatedAt,
    name: name ?? this.name,
    confidential: confidential ?? this.confidential,
    locationType: locationType ?? this.locationType,
    point: point ?? this.point,
  );

  @override
  bool operator ==(Object other) => identical(this, other)
    || other is Location && locationId == other.locationId && locationTypeId == other.locationTypeId && updatedAt == other.updatedAt && name == other.name && confidential == other.confidential && locationType == other.locationType && point == other.point;

  @override
  int get hashCode => locationId.hashCode ^ locationTypeId.hashCode ^ updatedAt.hashCode ^ name.hashCode ^ confidential.hashCode ^ locationType.hashCode ^ point.hashCode;
}

enum LocationLocationTypeEnum { INSIDE, OUTSIDE, CLIENT, HOME, ROOM, UNKNOWN }

extension LocationLocationTypeEnumEx on LocationLocationTypeEnum{
  String? get value => _locationLocationTypeEnumValues.reverse[this];
}

final _locationLocationTypeEnumValues = _LocationLocationTypeEnumConverter({
  'INSIDE': LocationLocationTypeEnum.INSIDE,
  'OUTSIDE': LocationLocationTypeEnum.OUTSIDE,
  'CLIENT': LocationLocationTypeEnum.CLIENT,
  'HOME': LocationLocationTypeEnum.HOME,
  'ROOM': LocationLocationTypeEnum.ROOM,
  'UNKNOWN': LocationLocationTypeEnum.UNKNOWN,
});

class _LocationLocationTypeEnumConverter<String, O> {
  final Map<String, O> map;
  Map<O, String>? reverseMap;

  _LocationLocationTypeEnumConverter(this.map);

  Map<O, String> get reverse => reverseMap ??= map.map((k, v) => MapEntry(v, k));
}

@immutable
class Point {

  const Point({
    required this.longitude,
    required this.latitude,
  });

  final double longitude;
  final double latitude;

  factory Point.fromJson(Map<String,dynamic> json) => Point(
    longitude: json['longitude'] as double,
    latitude: json['latitude'] as double
  );

  Map<String, dynamic> toJson() => {
    'longitude': longitude,
    'latitude': latitude
  };

  Point clone() => Point(
    longitude: longitude,
    latitude: latitude
  );


  Point copyWith({
    double? longitude,
    double? latitude
  }) => Point(
    longitude: longitude ?? this.longitude,
    latitude: latitude ?? this.latitude,
  );

  @override
  bool operator ==(Object other) => identical(this, other)
    || other is Point && longitude == other.longitude && latitude == other.latitude;

  @override
  int get hashCode => longitude.hashCode ^ latitude.hashCode;
}

Getting started #

  1. Create a directory jsons(default) at root of your project
  2. Put all or Create json files inside jsons directory
  3. run pub run apn_json2model. or flutter packages pub run apn_json2model flutter project

Usage #

this package will read .json file, and generate .dart file, asign the type of the value as variable type and key as the variable name.

DescriptionExpressionInput (Example)Output(declaration)Output(import)
declare type depends on the json value{...:any type}{"id": 1, "message":"hello world"},int id;
String message;
import model and asign type{...:"$value"}{"auth":"$user"}User auth;import 'user.dart'
import from path{...:"$../pathto/value"}{"price":"$../product/price"}Price price;import '../product/price.dart'
asign list of type and import (can also be recursive){...:"$[]value"}{"addreses":"$[]address"}List<Address> addreses;import 'address.dart'
import other library(input value can be array){"@import":...}{"@import":"package:otherlibrary/otherlibrary.dart"}import 'package:otherlibrary/otherlibrary.dart'
Datetime type{...:"@datetime"}{"createdAt": "@datetime:2020-02-15T15:47:51.742Z"}DateTime createdAt;
Enum type{...:"@enum:(folowed by enum separated by ',')"}{"@import":"@enum:admin,app_user,normal"}enum UserTypeEnum { Admin, AppUser, Normal }
Enum type with values {...:"@enum:(folowed by enum separated by ',')"}{"@import":"@enum:admin(0),app_user(1),normal(2)"}enum UserTypeEnum { Admin, AppUser, Normal }
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Publisher

appnormal.com

Generate model class from Json file. Fork of json_to_model.

Homepage

Documentation

API reference

License

MIT (LICENSE)

Dependencies

args, logging, path

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