google · trevorwang · Jun 18, 2020 · Jun 18, 2020 · Jun 18, 2020 · Jun 18, 2020
diff --git a/example/lib/example.dart b/example/lib/example.dart
@@ -25,10 +25,6 @@ class Person {
   Person(this.firstName, this.lastName, this.dateOfBirth,
       {this.middleName, this.lastOrder, List<Order> orders})
       : orders = orders ?? <Order>[];
-
-  factory Person.fromJson(Map<String, dynamic> json) => _$PersonFromJson(json);
-
-  Map<String, dynamic> toJson() => _$PersonToJson(this);
 }
 
 @JsonSerializable(includeIfNull: false)
@@ -49,10 +45,6 @@ class Order {
 
   Order(this.date);
 
-  factory Order.fromJson(Map<String, dynamic> json) => _$OrderFromJson(json);
-
-  Map<String, dynamic> toJson() => _$OrderToJson(this);
-
   static Duration _durationFromMilliseconds(int milliseconds) =>
       milliseconds == null ? null : Duration(milliseconds: milliseconds);
 
@@ -73,10 +65,6 @@ class Item {
   bool isRushed;
 
   Item();
-
-  factory Item.fromJson(Map<String, dynamic> json) => _$ItemFromJson(json);
-
-  Map<String, dynamic> toJson() => _$ItemToJson(this);
 }
 
 @JsonLiteral('data.json')

diff --git a/example/lib/example.g.dart b/example/lib/example.g.dart
diff --git a/example/lib/json_converter_example.g.dart b/example/lib/json_converter_example.g.dart
diff --git a/example/pubspec.yaml b/example/pubspec.yaml
@@ -16,5 +16,7 @@ dev_dependencies:
   test: ^1.6.0
 
 dependency_overrides:
+  json_annotation:
+    path: ../json_annotation
   json_serializable:
     path: ../json_serializable
diff --git a/example/test/example_test.dart b/example/test/example_test.dart
@@ -15,7 +15,7 @@ void main() {
     final personJson = _encode(person);
 
     final person2 =
-        Person.fromJson(json.decode(personJson) as Map<String, dynamic>);
+        PersonExt.fromJson(json.decode(personJson) as Map<String, dynamic>);
 
     expect(person.firstName, person2.firstName);
     expect(person.lastName, person2.lastName);

diff --git a/json_annotation/CHANGELOG.md b/json_annotation/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 3.0.2
+
+- Added extension to class to remove boilerplace code
+
 ## 3.0.1
 
 - Require at least Dart `2.6.0`.

diff --git a/json_annotation/lib/src/json_serializable.dart b/json_annotation/lib/src/json_serializable.dart
@@ -47,6 +47,28 @@ class JsonSerializable {
   /// [CheckedFromJsonException] is thrown.
   final bool checked;
 
+  /// If `Ext` (the default), a named extension `ExampleExt` is created
+  /// in the generated part file.
+  ///
+  /// ```dart
+  /// extension ExampleExt on Example {
+  /// }
+  /// ```
+  final String extensionSuffix;
+
+  /// If `true` (the default), a named extension `ExampleExt` is created
+  /// in the generated part file.
+  ///
+  /// ```dart
+  /// extension ExampleExt on Example {
+  ///   Example static fromJson(Map<String, dynamic> json) =>
+  ///     _$ExampleFromJson(json);
+  ///
+  ///    Map<String, dynamic> toJson() => _$ExampleToJson(this);
+  /// }
+  /// ```
+  final bool createExtension;
+
   /// If `true` (the default), a private, static `_$ExampleFromJson` method
   /// is created in the generated part file.
   ///
@@ -143,6 +165,8 @@ class JsonSerializable {
   const JsonSerializable({
     this.anyMap,
     this.checked,
+    this.createExtension,
+    this.extensionSuffix,
     this.createFactory,
     this.createToJson,
     this.disallowUnrecognizedKeys,
@@ -161,6 +185,8 @@ class JsonSerializable {
   static const defaults = JsonSerializable(
     anyMap: false,
     checked: false,
+    createExtension: true,
+    extensionSuffix: 'Ext',
     createFactory: true,
     createToJson: true,
     disallowUnrecognizedKeys: false,
@@ -179,6 +205,8 @@ class JsonSerializable {
   JsonSerializable withDefaults() => JsonSerializable(
         anyMap: anyMap ?? defaults.anyMap,
         checked: checked ?? defaults.checked,
+        createExtension: createExtension ?? defaults.createExtension,
+        extensionSuffix: extensionSuffix ?? defaults.extensionSuffix,
         createFactory: createFactory ?? defaults.createFactory,
         createToJson: createToJson ?? defaults.createToJson,
         disallowUnrecognizedKeys:

diff --git a/json_annotation/lib/src/json_serializable.g.dart b/json_annotation/lib/src/json_serializable.g.dart
diff --git a/json_annotation/pubspec.yaml b/json_annotation/pubspec.yaml
@@ -1,5 +1,5 @@
 name: json_annotation
-version: 3.0.1
+version: 3.0.2
 description: >-
   Classes and helper functions that support JSON code generation via the
   `json_serializable` package.

diff --git a/json_serializable/CHANGELOG.md b/json_serializable/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 3.4.1-dev
+
+- Generated extension code to remove boilerplate code
+
 ## 3.4.0-dev
 
 - Added support for `double` constants as default values.

diff --git a/json_serializable/doc/doc.md b/json_serializable/doc/doc.md
@@ -2,6 +2,7 @@
 | -------------------------- | ------------------------------------------- | --------------------------- |
 | any_map                    | [JsonSerializable.anyMap]                   |                             |
 | checked                    | [JsonSerializable.checked]                  |                             |
+| create_extension           | [JsonSerializable.createExtension]          |                             |
 | create_factory             | [JsonSerializable.createFactory]            |                             |
 | create_to_json             | [JsonSerializable.createToJson]             |                             |
 | disallow_unrecognized_keys | [JsonSerializable.disallowUnrecognizedKeys] |                             |
@@ -19,23 +20,24 @@
 |                            |                                             | [JsonKey.toJson]            |
 |                            |                                             | [JsonKey.unknownEnumValue]  |
 
-[JsonSerializable.anyMap]: https://pub.dev/documentation/json_annotation/3.0.1/json_annotation/JsonSerializable/anyMap.html
-[JsonSerializable.checked]: https://pub.dev/documentation/json_annotation/3.0.1/json_annotation/JsonSerializable/checked.html
-[JsonSerializable.createFactory]: https://pub.dev/documentation/json_annotation/3.0.1/json_annotation/JsonSerializable/createFactory.html
-[JsonSerializable.createToJson]: https://pub.dev/documentation/json_annotation/3.0.1/json_annotation/JsonSerializable/createToJson.html
-[JsonSerializable.disallowUnrecognizedKeys]: https://pub.dev/documentation/json_annotation/3.0.1/json_annotation/JsonSerializable/disallowUnrecognizedKeys.html
-[JsonSerializable.explicitToJson]: https://pub.dev/documentation/json_annotation/3.0.1/json_annotation/JsonSerializable/explicitToJson.html
-[JsonSerializable.fieldRename]: https://pub.dev/documentation/json_annotation/3.0.1/json_annotation/JsonSerializable/fieldRename.html
-[JsonSerializable.ignoreUnannotated]: https://pub.dev/documentation/json_annotation/3.0.1/json_annotation/JsonSerializable/ignoreUnannotated.html
-[JsonSerializable.includeIfNull]: https://pub.dev/documentation/json_annotation/3.0.1/json_annotation/JsonSerializable/includeIfNull.html
-[JsonKey.includeIfNull]: https://pub.dev/documentation/json_annotation/3.0.1/json_annotation/JsonKey/includeIfNull.html
-[JsonSerializable.nullable]: https://pub.dev/documentation/json_annotation/3.0.1/json_annotation/JsonSerializable/nullable.html
-[JsonKey.nullable]: https://pub.dev/documentation/json_annotation/3.0.1/json_annotation/JsonKey/nullable.html
-[JsonKey.defaultValue]: https://pub.dev/documentation/json_annotation/3.0.1/json_annotation/JsonKey/defaultValue.html
-[JsonKey.disallowNullValue]: https://pub.dev/documentation/json_annotation/3.0.1/json_annotation/JsonKey/disallowNullValue.html
-[JsonKey.fromJson]: https://pub.dev/documentation/json_annotation/3.0.1/json_annotation/JsonKey/fromJson.html
-[JsonKey.ignore]: https://pub.dev/documentation/json_annotation/3.0.1/json_annotation/JsonKey/ignore.html
-[JsonKey.name]: https://pub.dev/documentation/json_annotation/3.0.1/json_annotation/JsonKey/name.html
-[JsonKey.required]: https://pub.dev/documentation/json_annotation/3.0.1/json_annotation/JsonKey/required.html
-[JsonKey.toJson]: https://pub.dev/documentation/json_annotation/3.0.1/json_annotation/JsonKey/toJson.html
-[JsonKey.unknownEnumValue]: https://pub.dev/documentation/json_annotation/3.0.1/json_annotation/JsonKey/unknownEnumValue.html
+[JsonSerializable.anyMap]: https://pub.dev/documentation/json_annotation/3.0.2/json_annotation/JsonSerializable/anyMap.html
+[JsonSerializable.checked]: https://pub.dev/documentation/json_annotation/3.0.2/json_annotation/JsonSerializable/checked.html
+[JsonSerializable.createExtension]: https://pub.dev/documentation/json_annotation/3.0.2/json_annotation/JsonSerializable/createExtension.html
+[JsonSerializable.createFactory]: https://pub.dev/documentation/json_annotation/3.0.2/json_annotation/JsonSerializable/createFactory.html
+[JsonSerializable.createToJson]: https://pub.dev/documentation/json_annotation/3.0.2/json_annotation/JsonSerializable/createToJson.html
+[JsonSerializable.disallowUnrecognizedKeys]: https://pub.dev/documentation/json_annotation/3.0.2/json_annotation/JsonSerializable/disallowUnrecognizedKeys.html
+[JsonSerializable.explicitToJson]: https://pub.dev/documentation/json_annotation/3.0.2/json_annotation/JsonSerializable/explicitToJson.html
+[JsonSerializable.fieldRename]: https://pub.dev/documentation/json_annotation/3.0.2/json_annotation/JsonSerializable/fieldRename.html
+[JsonSerializable.ignoreUnannotated]: https://pub.dev/documentation/json_annotation/3.0.2/json_annotation/JsonSerializable/ignoreUnannotated.html
+[JsonSerializable.includeIfNull]: https://pub.dev/documentation/json_annotation/3.0.2/json_annotation/JsonSerializable/includeIfNull.html
+[JsonKey.includeIfNull]: https://pub.dev/documentation/json_annotation/3.0.2/json_annotation/JsonKey/includeIfNull.html
+[JsonSerializable.nullable]: https://pub.dev/documentation/json_annotation/3.0.2/json_annotation/JsonSerializable/nullable.html
+[JsonKey.nullable]: https://pub.dev/documentation/json_annotation/3.0.2/json_annotation/JsonKey/nullable.html
+[JsonKey.defaultValue]: https://pub.dev/documentation/json_annotation/3.0.2/json_annotation/JsonKey/defaultValue.html
+[JsonKey.disallowNullValue]: https://pub.dev/documentation/json_annotation/3.0.2/json_annotation/JsonKey/disallowNullValue.html
+[JsonKey.fromJson]: https://pub.dev/documentation/json_annotation/3.0.2/json_annotation/JsonKey/fromJson.html
+[JsonKey.ignore]: https://pub.dev/documentation/json_annotation/3.0.2/json_annotation/JsonKey/ignore.html
+[JsonKey.name]: https://pub.dev/documentation/json_annotation/3.0.2/json_annotation/JsonKey/name.html
+[JsonKey.required]: https://pub.dev/documentation/json_annotation/3.0.2/json_annotation/JsonKey/required.html
+[JsonKey.toJson]: https://pub.dev/documentation/json_annotation/3.0.2/json_annotation/JsonKey/toJson.html
+[JsonKey.unknownEnumValue]: https://pub.dev/documentation/json_annotation/3.0.2/json_annotation/JsonKey/unknownEnumValue.html
diff --git a/json_serializable/example/example.dart b/json_serializable/example/example.dart
@@ -12,6 +12,4 @@ class Person {
   final String lastName;
   final DateTime dateOfBirth;
   Person({this.firstName, this.lastName, this.dateOfBirth});
-  factory Person.fromJson(Map<String, dynamic> json) => _$PersonFromJson(json);
-  Map<String, dynamic> toJson() => _$PersonToJson(this);
 }
diff --git a/json_serializable/example/example.g.dart b/json_serializable/example/example.g.dart
diff --git a/json_serializable/lib/src/extension_helper.dart b/json_serializable/lib/src/extension_helper.dart
@@ -0,0 +1,18 @@
+import './helper_core.dart';
+
+abstract class ExtensionHelper implements HelperCore {
+  Iterable<String> createExtension() sync* {
+    assert(config.createExtension);
+    final buffer = StringBuffer()
+      ..writeln('extension $extensionName on $className { '
+          'static $className fromJson(Map<String, dynamic> json) => ${prefix}FromJson(json); '
+          'Map<String, dynamic> toJson() => ${prefix}ToJson(this); '
+          '}');
+
+    yield buffer.toString();
+  }
+
+  String get className => element.name;
+
+  String get extensionName => '$className${config.extensionSuffix}';
+}