django rest框架中具有多对多字段关系的CRUD操作

from django.db import models

class Course(models.Model):
    title = models.CharField(max_length=100)

class Student(models.Model):
    name = models.CharField(max_length=100)
    courses = models.ManyToManyField(Course)

student = Student.objects.create(name='Alice')
course1 = Course.objects.get(id=1)
course2 = Course.objects.get(id=2)
student.courses.add(course1, course2)

student = Student.objects.get(id=1)
courses = student.courses.all()

student = Student.objects.get(id=1)
course_to_remove = Course.objects.get(id=1)
course_to_add = Course.objects.get(id=3)
student.courses.remove(course_to_remove)
student.courses.add(course_to_add)

student = Student.objects.get(id=1)
student.delete()

students = Student.objects.prefetch_related('courses')

from rest_framework import serializers

class CourseSerializer(serializers.ModelSerializer):
    class Meta:
        model = Course
        fields = '__all__'

class StudentSerializer(serializers.ModelSerializer):
    courses = CourseSerializer(many=True)

    class Meta:
        model = Student
        fields = ['id', 'name', 'courses']

    def create(self, validated_data):
        courses_data = validated_data.pop('courses')
        student = Student.objects.create(**validated_data)
        for course_data in courses_data:
            course, created = Course.objects.get_or_create(**course_data)
            student.courses.add(course)
        return student

    def update(self, instance, validated_data):
        courses_data = validated_data.pop('courses')
        instance.name = validated_data.get('name', instance.name)
        instance.save()
        instance.courses.clear()
        for course_data in courses_data:
            course, created = Course.objects.get_or_create(**course_data)
            instance.courses.add(course)
        return instance