How to get the number of students of all courses of the current teacher?

Question

Django

there is a course model, the course has a teacher (foreignkey) and students (manytomanyfield)
the task is to get the number of students from all courses of a particular teacher. How easy and simple is it to implement? Or do you have to loop through?
Describe with an example, please)

Answer 1

Try this code to count the number of teacher's students

teacher_student_count = User. courses.all().aggregate(Count('students')