ngModel on the same form field as formControlName

Question

Hi guys how can I fix this error in my Crud? I am using Angular 11

 

It looks like you're using ngModel on the same form field as formControlName. Support for using the ngModel input property and ngModelChange event with reactive form directives has been deprecated in Angular v6 and will be removed in Angular v7.


component.ts
import { Component, OnInit } from '@angular/core';
import { StudentService } from '../student.service';
import { Student } from '../student';
import { Observable,Subject } from "rxjs";

import {FormControl,FormGroup,Validators} from '@angular/forms';

@Component({
selector: 'app-student-list',
templateUrl: './student-list.component.html',
styleUrls: ['./student-list.component.css']
})
export class StudentListComponent implements OnInit {

constructor(private studentservice:StudentService) { }

studentsArray: any[] = [];
dtOptions: DataTables.Settings = {};
dtTrigger: Subject<any>= new Subject();

students: Observable<Student[]>;
student : Student=new Student();
deleteMessage=false;
studentlist:any;
isupdated = false;


ngOnInit() {
this.isupdated=false;
this.dtOptions = {
pageLength: 6,
stateSave:true,
lengthMenu:[[6, 16, 20, -1], [6, 16, 20, "All"]],
processing: true
};
this.studentservice.getStudentList().subscribe(data =>{
this.students =data;
this.dtTrigger.next();
})
}

deleteStudent(id: number) {
this.studentservice.deleteStudent(id)
.subscribe(
data => {
console.log(data);
this.deleteMessage=true;
this.studentservice.getStudentList().subscribe(data =>{
this.students =data
})
},
error => console.log(error));
}

updateStudent(id: number){
this.studentservice.getStudent(id)
.subscribe(
data => {
this.studentlist=data
},
error => console.log(error));
}

studentupdateform=new FormGroup({
student_id:new FormControl(),
student_name:new FormControl(),
student_email:new FormControl(),
student_branch:new FormControl()
});

updateStu(updstu){
this.student=new Student();
this.student.student_id=this.StudentId.value;
this.student.student_name=this.StudentName.value;
this.student.student_email=this.StudentEmail.value;
this.student.student_branch=this.StudentBranch.value;
console.log(this.StudentBranch.value);


this.studentservice.updateStudent(this.student.student_id,this.student).subscribe(
data => {
this.isupdated=true;
this.studentservice.getStudentList().subscribe(data =>{
this.students =data
})
},
error => console.log(error));
}

get StudentName(){
return this.studentupdateform.get('student_name');
}

get StudentEmail(){
return this.studentupdateform.get('student_email');
}

get StudentBranch(){
return this.studentupdateform.get('student_branch');
}

get StudentId(){
return this.studentupdateform.get('student_id');
}

changeisUpdate(){
this.isupdated=false;
}
}

component.html
<div class="panel panel-default">
<div class="panel-heading">
<h1 style="text-align: center">Students</h1><br>
<div class="row" [hidden]="!deleteMessage">

<div class="col-sm-4"></div>
<div class="col-sm-4">
<div class="alert alert-info alert-dismissible">
<button type="button" class="close" data-dismiss="alert">×</button>
<strong>Student Data Deleted</strong>
</div>
</div>
<div class="col-sm-4"></div>
</div>
</div>


<div class="panel-body">
<table class="table table-hover table-sm" datatable [dtOptions]="dtOptions"
[dtTrigger]="dtTrigger" >
<thead class="thead-light">
<tr>
<th>Student Name</th>
<th>Student Email</th>
<th>Student Branch</th>
<th>Action</th>

</tr>
</thead>
<tbody>
<tr *ngFor="let student of students ">
<td>{{student.student_name}}</td>
<td>{{student.student_email}}</td>
<td>{{student.student_branch}}</td>
<td><button (click)="deleteStudent(student.student_id)" class='btn btn-primary'><i class="fa fa-futboll-0">Delete</i></button>
<button (click)="updateStudent(student.student_id)" class='btn btn-info'
data-toggle="modal" data-target="#myModal">Update</button>
</td>
</tr>
</tbody><br>
</table>
</div>
</div>

<div class="modal" id="myModal">
<div class="modal-dialog">
<div class="modal-content">
<form [formGroup]="studentupdateform" #updstu (ngSubmit)="updateStu(updstu)">
<!-- Modal Header -->
<div class="modal-header">
<h4 class="modal-title" style="text-align: center">Update Student</h4>

</div>

<!-- Modal body -->
<div class="modal-body" *ngFor="let student of studentlist " >
<div [hidden]="isupdated">

<input type="hidden" class="form-control" formControlName="student_id" [(ngModel)]="student.student_id">
<div class="form-group">
<label for="name">Student Name</label>
<input type="text" class="form-control" formControlName="student_name" [(ngModel)]="student.student_name" >
</div>

<div class="form-group">
<label for="name">Student Email</label>
<input type="text" class="form-control" formControlName="student_email" [(ngModel)]="student.student_email">
</div>

<div class="form-group">
<label for="name">Student Branch</label>
<select class="form-control" formControlName="student_branch" required>
<option value="B-Tech" [selected]="'B-Tech' == student.student_branch">B-Tech</option>
<option value="BCA" [selected]="'BCA' == student.student_branch">BCA</option>
<option value="MCA" [selected]="'MCA' == student.student_branch" >MCA</option>
<option value="M-Tech" [selected]="'M-Tech' == student.student_branch">M-Tech</option>
</select>
</div>
</div>
<div [hidden]="!isupdated">
<h4>Student Detail Updated!</h4>
</div>

</div>

<!-- Modal footer -->
<div class="modal-footer" >
<button type="submit" class="btn btn-success" [hidden]="isupdated">Update</button>
<button type="button" class="btn btn-danger" data-dismiss="modal" (click)="changeisUpdate()">Close</button>
</div>

</form>
</div>
</div>
</div>