add staff id instead of username in flutter - database

Question

I want to add staff id instead of username and staff id save in database how can i do this Please guide me i cannot understand how can i do this. when i selected particular username the staff id not save in database it give error like LateInitializationError: Field 'staff_Id' has already been initialized.
class AppointmentDetailsEditPage extends StatefulWidget {
final int aptId;
//late final int staffid;
final int staff_Id;
final int docID;
final String dTitle;
final int tNo;
final String aptExecutive;
AppointmentDetailsEditPage(
this.aptId,
// this.staffid,
this.staff_Id,
this.docID,
this.dTitle,
this.tNo,
this.aptExecutive);
#override
_AppointmentDetailsEditPageState createState() =>
_AppointmentDetailsEditPageState(
this.aptId,
//this.staffid,
this.staff_Id,
this.docID,
this.dTitle,
this.tNo,
this.aptExecutive);
}
class _AppointmentDetailsEditPageState
extends State<AppointmentDetailsEditPage> {
var paymentMode = ["Online", "Cash", "Cheque"];
String? selectedMode;
var items = ["Owner", "Tenant", "Agent", "Both"];
// late final int dID;
var status = ["Open", "Closed", "Cancel"];
TextStyle style = const TextStyle(fontFamily: 'Montserrat', fontSize: 6.0);
AppointmentController appointmentController =
Get.put(AppointmentController());
late Future<Appointment> futureAppointments;
late final int aptId;
// late final int staffid;
late final int staff_Id;
late final int docID;
late final String dTitle;
late final int tNo;
late String aptExecutive;
List<Appointment> aptmnt = [];
_AppointmentDetailsEditPageState(
this.aptId,
//this.staffid,
this.staff_Id,
this.docID,
this.dTitle,
this.tNo,
this.aptExecutive,
);
#override
void initState() {
super.initState();
futureAppointments =
AppointmentController.fetchAppointmentsById(this.aptId);
init();
}
Future init() async {
print('apt ID $aptId');
final aptmnt = await AppointmentController.fetchAppointments;
setState(() {
this.aptmnt = aptmnt as List<Appointment>;
print(aptmnt);
});
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Color.fromARGB(255, 3, 87, 156),
title: Text('Edit Appointment'),
// flexibleSpace: LogOut(),
leading: IconButton(
icon: BackButtonIcon(),
onPressed: () => Navigator.of(context).push(MaterialPageRoute(
builder: (BuildContext context) => AppointmentDetails(
aptId, staff_Id, docID, dTitle, tNo, aptExecutive)))),
),
body:
//SafeArea(
Center(
child: SafeArea(
child: SingleChildScrollView(
child: Container(
alignment: Alignment.center,
child: FutureBuilder<Appointment>(
future: futureAppointments,
builder: (context, snapshot) {
if (snapshot.connectionState == ConnectionState.done) {
if (snapshot.hasData) {
return Form(
key: _formKey,
child: Padding(
padding: const EdgeInsets.all(7),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
SizedBox(
// height: 80.0,
width:
MediaQuery.of(context).size.width *
0.4,
child: TypeAheadField<UserLogin>(
hideSuggestionsOnKeyboardHide: true,
textFieldConfiguration:
TextFieldConfiguration(
decoration: InputDecoration(
errorStyle: const TextStyle(
fontSize: 0.05),
fillColor: Color.fromARGB(
255, 233, 246, 252),
// prefixIcon: Icon(Icons.search),
suffixIcon: GestureDetector(
child: Icon(
Icons.close,
color: Color.fromARGB(
137, 221, 221, 221),
size: 20,
),
onTap: () {
aptExecutiveController
.clear();
FocusScope.of(context)
.requestFocus(
FocusNode());
},
),
border: OutlineInputBorder(
// borderRadius: BorderRadius.circular(10.0),
),
hintText:
'Appointment Executive ',
labelText:
'Appointment Executive',
hintStyle:
TextStyle(fontSize: 12),
),
controller: this
.aptExecutiveController =
TextEditingController(
text:
'${this.aptExecutive}'),
),
suggestionsCallback: (pattern) async {
return await LoginController
.users();
},
itemBuilder:
(context, UserLogin allUsers) {
final user = allUsers;
return ListTile(
title: Text(user.userName),
);
},
noItemsFoundBuilder: (context) =>
Container(
height: 50,
child: Center(
child: Text(
'No Staff Found.',
style: TextStyle(fontSize: 12),
),
),
),
onSuggestionSelected:
(UserLogin? AllUsers) {
final user = AllUsers!;
this.aptExecutiveController.text =
user.userName;
//this.uId = stID;
setState(() {
this.staff_Id = user.userId;
});
},
),
),
child: ElevatedButton(
onPressed: () {
final int aptId = this.aptId;
print('apt id update $aptId');
final int staffId = this.staff_Id;
print('staff id update $staff_Id');
final int docId = this.docID;
print('doc id update $docID');
Navigator.of(context).push(
MaterialPageRoute(
builder:
(BuildContext context) =>
AppointmentDetails(
aptId,
staff_Id,
docID,
dTitle,
tNo,
aptExecutive)));
setState(() {
futureAppointments =
createAppointment(
aptId,
staffId,
docId,
);
});
},
child: const Text(
"Save",
style: TextStyle(fontSize: 17),
),