我有以下模型:作者发布classAuthorimplementsModel{Stringname;Stringemail;User({this.name,this.email});factoryUser.fromMap(Mapdata){returnUser(name:data['name']??'JonDoe'email:data['email']??'jon@doe.com';)}}classPostimplementsModel{Userauthor;Stringcontent;User({this.name,this.email});factoryPost.fromMap(Ma

我有以下模型:作者发布classAuthorimplementsModel{Stringname;Stringemail;User({this.name,this.email});factoryUser.fromMap(Mapdata){returnUser(name:data['name']??'JonDoe'email:data['email']??'jon@doe.com';)}}classPostimplementsModel{Userauthor;Stringcontent;User({this.name,this.email});factoryPost.fromMap(Ma

我正在尝试使用fromJson分配JSON响应Dart实体，但返回对象具有所有空值。json如下所示:{"doc":{"id":"6496772","name":"TestDocument",}"custom_keys":[{"key":"X1","name":"X1"},{"key":"X2","name":"X2"},]}我创建了如下测试实体classTest{finalStringid;finalStringname;constFeature({this.id,this.name,});Feature.fromMap(Mapmap):id=map['id'],name=map['