class Course(models.Model): pass class Training(models.Model): student = models.ForeignKey( to="Student" ) course = models.ForeignKey( to=Course ) excluded_teachers = models.ManyToManyField( to="Teacher" ) class Student(models.Model): user = models.ForeignKey( to=User ) course = models.ManyToManyField( to=Course, through=Training ) class Teacher(models.Model): user = models.ForeignKey( to=User ) course = models.ManyToManyField( to=Course ) student = Student.objects.get(pk=1) teacher = Teacher.objects.get(pk=1) # Get all courses that student can attend for given teacher. Teacher cannot take part in Training from which is excluded, by "excluded_teachers" field. # What is correct querry?
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