update

lib/pages/rates/cargo_editor.dart

@@ -11,7 +11,7 @@ import 'package:provider/provider.dart';
 import 'model/shipment_rate_model.dart';
 
 class CargoEditor extends StatefulWidget {
-  final CargoType cargo;
+  final CargoType? cargo;
   CargoEditor({this.cargo});
 
   @override
@@ -23,14 +23,14 @@ class _CargoEditorState extends State<CargoEditor> {
   TextEditingController _rateController = new TextEditingController();
 
   bool _isLoading = false;
-  CargoType _cargo;
+  late CargoType _cargo;
   bool _isNew = false;
 
   @override
   void initState() {
     super.initState();
     if (widget.cargo != null) {
-      _cargo = widget.cargo;
+      _cargo = widget.cargo!;
       _descController.text = _cargo.name;
       _rateController.text = _cargo.rate.toStringAsFixed(2);
     } else {
@@ -71,7 +71,7 @@ class _CargoEditorState extends State<CargoEditor> {
             },
           ),
           backgroundColor: primaryColor,
-          title: Text(AppTranslations.of(context).text("cargo.form.title")),
+          title: Text(AppTranslations.of(context)!.text("cargo.form.title")),
           actions: [
             IconButton(
               icon: Icon(Icons.delete),
@@ -114,7 +114,7 @@ class _CargoEditorState extends State<CargoEditor> {
       if (_isNew) {
         await shipmentRateModel.addCargoType(_cargo);
       } else {
-        _cargo.id = widget.cargo.id;
+        _cargo.id = this._cargo.id;
         await shipmentRateModel.updateCargoType(_cargo);
       }
       Navigator.pop(context);
@@ -138,7 +138,7 @@ class _CargoEditorState extends State<CargoEditor> {
     try {
       var shipmentRateModel =
           Provider.of<ShipmentRateModel>(context, listen: false);
-      await shipmentRateModel.deleteCargoType(widget.cargo.id);
+      await shipmentRateModel.deleteCargoType(this._cargo.id);
       Navigator.pop(context);
     } catch (e) {
       showMsgDialog(context, "Error", e.toString());
@@ -155,7 +155,7 @@ class _CargoEditorState extends State<CargoEditor> {
     } else {
       CargoType _cargo = CargoType(
           name: _descController.text, rate: double.parse(_rateController.text));
-      return widget.cargo.isChangedForEdit(_cargo);
+      return this._cargo.isChangedForEdit(_cargo);
     }
   }
 }