Flutter - GetX - pass data to controller and process and return to view-CodePudding

The view i have for my dashboard is here https://postimg.cc/PvjfLfWf. I want to pass a date from UI to controller and fetch orders for that date. Seperate them into delivered orders and others. After that i want to display length of delivered orders and ongoing orders. Also i want to display total amount of orders placed via COD. and display COD orders in summary widget.

I have written code in UI. But it's taking too much of time to load since it is a large database. How to do this in GetX controller?

processOrders() {
    _db
        .collection('orders')
        .where('driverId', isEqualTo: sp.getString('uid'))
        .where(
        'timeStamp', isGreaterThanOrEqualTo: Timestamp.fromDate(pickedDate!))
        .where('timeStamp', isLessThan: Timestamp.fromDate(nextDay!))
        .where('status', isEqualTo: 'Delivered')
        .orderBy('timeStamp', descending: true)
        .get()
        .then((querySnapshot) {
      querySnapshot.docs.forEach((element) {
        deliveredOrders.add(element.data());
      });
    });

    var CODOrders = deliveredOrders.where((element) =>
    element['paid'] == 'COD').toList();
    CODOrders.forEach((element) {
      cashInHand = cashInHand   element['grandTotal'];
      tip = tip   element['tip'];
    });
  }

I'm new to GETX and flutter. Any help would be appreciated.

CodePudding user response：

example if you want to display the "totalAmount"

declare variable and assign the value in controller homeController.dart

var totalAmount = 0.00.obs;

// assign data
totalAmount.value = 1000;

home.dart

  final homeController _homeController = Get.put(homeController());

// read data here like this
  Text(_homeController.totalAmount.value)