How to select an item from a List in flutter

Question

I have list from a model like this

amount:"12000"
dateTime:"19/07/2018"
detail:"Soto"
hashCode:853818549
id:1
name:"Theodorus"

I want to just select amount and add it to another list of string, but I'm always getting this error A value of type 'String' can't be assigned to a variable of type 'List<String>'. , I thinks its because im not doing it right, here is my code below

void setupList() async {
    DebtDatabase db = DebtDatabase();
    listCache = await db.getMyDebt();
    setState(() {
      filtered = listCache;
    });
     List<String> amount = new List<String>();
    listCache.map((value)  {
      amount = value.amount;   } );
    //print(amount);
  } 

can anyone help me, so I can get list of ammount from this model list and then sum all the ammount?

Answer 1

The map function returns an iterable and you can then transform it into a list. You should try something like this:

void setupList() async {
  DebtDatabase db = DebtDatabase();
  listCache = await db.getMyDebt();
  setState(() {
    filtered = listCache;
  });
  List<String> amount = listCache.map((value) => value.amount).toList();
  //print(amount);
}