Django REST Framework: still N+1 queries after select_related, what am I missing?
One of my mentees brought this to me and now I am also stuck, which is humbling. We have a simple endpoint listing courses. Each course has a teacher (ForeignKey) and many tags (ManyToMany), and the serializer also shows how many students are enrolled. class CourseSerializer(serializers.ModelSerializer): teacher = TeacherSerializer() tags = TagSerializer(many=True) student_count = serializers.SerializerMethodField()…