FlutterJsonPath in Dart

A way to get and set json Map values using key paths!

NOTE: A valid Map<String, dynamic> can be obtained using json encode/decode functions. This package will not work properly if your Map variable was initialized using Map Literals

Features

Now you can read and write your json files without converting them to a model mapped version. Just use the key path to go directly where you want and get, set, delete or gen keys and values!

Installing

Add FlutterJsonPath to your pubspec.yaml file:

dependencies:
  flutter_json_path: latest_version

Import FlutterJsonPath in files that it will be used:

import 'package:flutter_json_path/flutter_json_path.dart';

Getting started

Just create an instance of FlutterJsonPath and start working:

final parser = FlutterJsonPath();
final result = parser.gen('foo/bar/baz');
print('gen: $result'); // gen: {foo: {bar: baz: {}}}

Usage

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

void main() {
  // Just to use as an example.
  // This is Map Literals initialization.
  Map<String, dynamic> target = {
    'foo': {
      'bar': {
        'baz': 42,
      },
    },
  };
  // This package does not work with Map Literals.
  // Must convert your Map to Json string and to Map again.
  // (if this is the case)
  target = jsonDecode(jsonEncode(target));

  final parser = FlutterJsonPath();

  var json1 = {...target};
  var value = parser.get(json1, 'foo/bar/baz');
  print('get: $value'); // get: 42

  var json2 = {...target};
  parser.set(json2, 'foo/bar', null);
  print('set: $json2'); // set: {foo: {bar: CLUB}}

  var json3 = {...target};
  parser.delete(json3, 'foo/bar');
  print('del: $json3');  // del: {foo: {}}
}

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