How can i display count of each column in django - django

Question

Display
I would like to count the number of students for each subjects but currently it only displays the number of students for one subject. it only counts the number of student for one subject but i would like to count the number of students in each subject
Added the models.py. Ps still new to django
views.py
class SubjectView(TemplateView):
template_name='subjects.html'
def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
username=self.request.user.id
#filter subject taught by lecturer
classdets=ClassDetail.objects.all().filter(teacher=username).values_list('subject_id')
print(classdets)
#filters all subjects from the class details
subj=Subject.objects.filter(id__in=classdets)
print(subj)
#counts number of students
subjID=Subject.objects.values('id')
num_student=ClassDetail.objects.filter(id__in=subjID).count
print(num_student)
context['subjects'] = subj
context['no_students'] = num_student
return context
template
{% extends "base.html" %}
{% load static %}
{% block title %}Subjects{% endblock title %}
{% block sidenavbar %}
{% include 'partials/sidenavbar.html' %}
{% endblock %}
{% block navbar %}
{% include 'partials/navbar.html' %}
{% endblock %}
{% block subject %}
<div class="container-fluid">
<div class="col">
<div class="card bg-transparent">
<!-- Card header -->
<div>
<div class="card-header bg-transparent border-0">
<h3 class="mb-0" style="text-transform: uppercase">Current Subjects</h3>
{% comment %} View Students {% endcomment %}
</div>
</div>
<!-- Translucent table -->
<div class="table-responsive">
<table class="table align-items-center table-flush" id="datatable-buttons">
<thead class="thead-light">
<tr>
<th>Subject Name</th>
<th>Subject Code</th>
<th>Number of Students</th>
{% comment %} <th>Generate Attendance Code</th> {% endcomment %}
</tr>
</thead>
{% if user.is_authenticated %}
{% for subject in subjects %}
<tbody class="list" style="text-transform: capitalize">
<tr>
<th scope="row">
<div class="media align-items-center">
<a href="#" class="avatar rounded-circle mr-3">
{% if subject.thumbnail %}
<img alt="Logo" src="{{subject.thumbnail.url}}" />
{% endif %}
</a>
<div class="media-body">
<span class="name mb-0 text-sm">{{subject}}</span>
</div>
</div>
</th>
<td class="budget">{{subject.code}}</td>
<td>
<div class="d-flex align-items-center">
<span class="completion mr-2">{{no_students}}</span>
</div>
</td>
<td>
{% comment %}
<div class="d-flex align-items-center">
<span class="completion mr-2">{{attendace_code}}</span>
</div>
{% endcomment %}
</td>
</tr>
</tbody>
{% endfor %}
{% endif %}
</table>
</div>
</div>
</div>
</div>
{% endblock %}
models
def get_thumbnail(instance, filename):
path = f"static/assets/img/custom/{filename}"
return path
class Subject(models.Model):
code=models.CharField(max_length=8,unique=True,default="")
name=models.CharField(max_length=100,unique=True)
thumbnail=models.ImageField(blank=True,null=True,upload_to=get_thumbnail)
def __str__(self):
return f'{self.name}'
class Meta:
unique_together = ('name', 'code')
class ClassDetail(models.Model):
teacher=models.ForeignKey(UserProfile,on_delete=models.PROTECT)
subject=models.ForeignKey(Subject, on_delete=models.PROTECT, default="")
student=models.ManyToManyField(UserProfile,related_name="student")
def __str__(self):
return f'{self.subject}'
class Meta:
unique_together = ('teacher', 'subject')
userprofile
class UserProfile(AbstractUser):
ROLE_LECTURER = 'lecturer'
ROLE_STUDENT = 'student'
ROLE_ADMIN = 'admin'
ROLE_CHOICES = (
(ROLE_LECTURER, _('Lecturer')),
(ROLE_STUDENT, _('Student')),
(ROLE_ADMIN, _('Admin')),
)
STATUS_ACTIVE = 'active'
STATUS_INACTIVE = 'inactive'
STATUS_SUSPENDED = 'suspended'
STATUS_EXPIRED = 'expired'
STATUS_CHOICES = (
(STATUS_ACTIVE, _('Active')),
(STATUS_INACTIVE, _('Inactive')),
(STATUS_SUSPENDED, _('Suspended')),
(STATUS_EXPIRED, _("Expired")),
)
username = models.CharField(max_length=11, unique=True, verbose_name="Relevant ID")
status = models.CharField(_('status'), max_length=50, choices=STATUS_CHOICES, default=STATUS_ACTIVE)
role = models.CharField(_('role'), max_length=50, choices=ROLE_CHOICES, default="")
def __str__(self):
return f'{self.username} ({self.first_name})'
USERNAME_FIELD = 'username'

Answer 1

num_student =subjID.classdetail_set.all().count()
print(num_student)