how can i initialize super class variables in dart language?

Question

Simply i have to classes child and parent class
i am new in dart language all i need to assign super class properties from child class

this is super class structure

class Trip{
  final int id;
  final String title;
  final double price;
  Trip({this.id,this.title,this.price});
}

and this is child class

class FullTrip extends Trip{
  final String data;
  FullTrip({this.data}) : super(id:id,title:title,price:price);
}

sure this not working at all
the question is : how can i initialize instance from FullTrip and pass variable for FullTrip and Trip(super class)
thanks in advance

Answer 1

You need to repeat the parameters in the subclass.

class FullTrip extends Trip{
  final String data;
  FullTrip({this.data, int id, String title, double price}) : super(id:id,title:title,price:price);
}

There are discussions about reducing such boilerplate for constructors, but nothing is decided yet as far as I know.