Flutter FutureBuilder return null

[Mustafa ARPACIOĞLU]

when listing the data in my local database with FutureBuilder snapshot return null. I don't listing my data. when I check connection status it is waiting. when debugprint dbHelper.randevuListesiGetir() method, my data listing console screnn but not listing futurebuilder.

class _RandevularState extends State<Randevular> {
  DatabaseHelper dbHelper;
  List<Randevu> tumRandevular;
  @override
  void initState() {
    // TODO: implement initState
    super.initState();

      dbHelper=DatabaseHelper();
     tumRandevular=List<Randevu>();
  }

  @override
  Widget build(BuildContext context) {
    return FutureBuilder(
      future:dbHelper.randevuListesiGetir() ,
      builder: (context,AsyncSnapshot<List<Randevu>> snapshot){
        if(snapshot.connectionState==ConnectionState.done){
          tumRandevular=snapshot.data;
          print("data"+snapshot.data.toString());
        }else if(snapshot.connectionState==ConnectionState.waiting){
          print("waiting");
        }else{
          print("error");
        }

      },
    );
  }

}

[Suzuki Tomohiro]

Would you add print statement for the case of snapshot ==null?

What does the code print after that?

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