Suppose in a relational database schema we have a student, a subject and a teacher which connect to each other with a relation teaches. Also, the relation has an attribute time that stores the time of the lesson. This is the most complete yet simplified example I can think to describe my case. Now, the most pythonic and django-wise way I can think of trying to reach a correct solution is, after creating a model class for student, subject and teacher, to create a new class Teaches, which has the foreign keys for the three other classes; also it has the property date field for time. This class would look something like this:

class Teaches(models.Model):
    teachers = models.ForeignKey(Teacher, on_delete_models.CASCADE)
    subjects = models.ForeignKey(Subject, on_delete_models.CASCADE)
    students = models.ForeignKey(Student, on_delete_models.CASCADE)
    time = models.DateField

    class Meta:
        constraints = [
            fields=['teachers', 'subjects', 'students']
            name='teacher_subject_student_triplet'
        ]

I added the Meta class because this is what