Robo-advisory-dart/lib/models/transaction.dart

class Category {
  String name;
  String color;

  Category({required this.name, required this.color});

  Category.formJson(Map<String, dynamic> map)
      : name = map["name"],
        color = map["color"];
}

class Transaction {
  String amount;
  String description;
  String date;
  String name;
  Category category;

  Transaction(
      {required this.amount,
      required this.description,
      required this.date,
      required this.name,
      required this.category});

  Transaction.fromJson(Map<String, dynamic> map)
      : category = Category.formJson(map["category"]),
        amount = map["amount"],
        description = map["description"],
        name = map["name"],
        date = map["date"];
}