Tool Guide & Dart (Flutter) Data Model Info

Tool Features

• Fully Automatic Manual Parse: Deeply traverses and parses nested objects and arrays, generating absolutely safe fromJson and toJson factory methods that do not rely on any third-party libraries. This is especially suitable for small to medium-sized projects or scenarios where build tools are not desired.
• json_serializable Support: For large Flutter projects using json_serializable, the tool will automatically add the part directive and @JsonKey annotations, so you only need to run build_runner.
• Sound Null Safety: Fully supports sound null safety introduced in Dart 2.12. When enabled, all properties will have a ? nullable marker attached, preventing dirty interface data from causing red screen crashes at runtime.

Factory Constructors in Dart

• factory Keyword: In Dart, factory ClassName.fromJson(...) is a very classic way to instantiate JSON. Factory constructors allow us to perform complex parsing and judgments in the method body and finally return a new instance (or an instance from the cache).
• final Modifier: In Flutter state management (especially with Provider or Bloc), data models should be Immutable. Therefore, the tool uses the final modifier for all fields by default.