title: I would like to get count of rows within 2 related Django Models
body: <p>I have the following models within my models.py as shown below:</p>
  
  <pre><code>class Classroom(models.Model):
      name = models.CharField(max_length=10)
  
  class Student(models.Model):
      reg_no = models.CharField(max_length=10)
      name = models.CharField(max_length=64)
      dob = models.DateField()
      current_class = models.ForeignKey(Classroom, on_delete=models.CASCADE)
  </code></pre>
  
  <p>I would to display count of how many students are there in each class. For example, if we have 10 students in Class 1, 15 students in Class 2, 20 students in Class 3, 25 students in Class 4 and so on.</p>
  
  <p>I would like to display something like, what's shown below:</p>
  
  <p>Class 1 (10)
  Class 2 (15)
  Class 3 (20)
  Class 4 (25)</p>
  
  <p>I would be really thankful if anyone could help me with this. Thanks in advance!</p>