Edit record is not saving changes in frontend

I am creating a CRUD application. The create, read and delete function are working but edit record is showing the instance in the form but it is not saving changes.

Here is my code.

=======

views.py

def edit(request, id):

    student = Student.objects.get(id=id)  

    form = StudentForm(request.POST, instance = student) 

    if form.is_valid():  

        form.save()  

        return redirect("/")      

    return render(request, 'pages/edit.html', {'form': form, 'student': student}) 

urls

edit.html

{% extends 'pages/base.html' %}

{% block content %}

    <form method="POST" action="" enctype="multipart/form-data">

        {% csrf_token %}

        <input type="hidden" name="id" id="id" value="{{student.id}}"><br><br>

        

        <label for="">First Name</label>

       <input type="text" maxlength="20" name="first_name" id="first_name" value="{{student.first_name}}"><br><br>

        <label for="">Last Name</label>

        <input type="text" maxlength="20" name="last_name" id="last_name" value="{{student.last_name}}"><br><br>

       

        <label for="">Date of birth</label>

        <input type="text" maxlength="20" name="date_of_birth" id="date_of_birth" value="{{student.date_of_birth}}"><br><br>

       

        <label for="">level</label>

        <input type="text" maxlength="20" name="level" id="level" value="{{student.level}}"><br><br>

        

     <label for="">Gender</label>

     <!-- <input type="text" name="gender" id="gender" value="{{student.gender}}"><br><br> -->

           <Select name="gender">

            <option>Select</option>

            <option value="Male">Male</option>

            <option value="Female">Female</option>

        </Select><br><br>

     

        <label for="">Phone</label>

        <input type="text" maxlength="20" name="phone" id="phone" value="{{student.phone}}"><br><br>

        <label for="">Department</label>

        <input type="text" maxlength="20" name="department" id="department" value="{{student.department}}"><br><br>

 

        <label for="">Email</label>

        <input type="text" maxlength="20" name="email" id="email" value="{{student.email}}"><br><br>

 

      

       <label for="">Address</label>

       <input type="text" maxlength="20" name="addressl" id="address" value="{{student.address}}"><br><br>

     

       <label for="">Course</label>

       <!-- <input type="text" name="course" id="course" value="{{student.course}}"><br><br>

       -->

        {% for i in student.course.all %}

        <input type="text" value="{{i.name}}"><br><br>

        {% endfor %}

       

        <input type="submit" value="Submit">

    </form>

{% endblock %}

What could be wrong?

Thank you in advance.

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