多对多删除

模型

from django.db import models

# 学生类
class Student(models.Model):
    name = models.CharField(max_length=32)
# 老师类
class Teacher(models.Model):
    name = models.CharField(max_length=32)
    students = models.ManyToManyField(to='Student',related_name='stu')

视图

老师删除一个学生

from rest_framework.views import APIView
from rest_framework.response import Response
from . import models
# 老师类
class TeacherView(APIView):
    def delete(self, request):
        teacherobj = models.Teacher.objects.filter(id=3).first()
        stuobj = models.Student.objects.filter(id=2).first()
        teacherobj.students.remove(stuobj)
        return Response({
            "status": 200,
            "msg":"删除成功"
        })

老师删除所有学生

from rest_framework.views import APIView
from rest_framework.response import Response
from . import models
# 老师类
class TeacherView(APIView):
    def delete(self, request):
        teacherobj = models.Teacher.objects.filter(id=3).first()
        teacherobj.students.clear()
        return Response({
            "status": 200,
            "msg":"删除成功"
        })

学生删除一个老师

from rest_framework.views import APIView
from rest_framework.response import Response
from . import models
# 学生类
class StudentView(APIView):
    def delete(self, request):
        stuobj = models.Student.objects.filter(id=2).first()
        teacherobj = models.Teacher.objects.filter(id=3).first()
        stuobj.stu.remove(teacherobj)
        return Response({
            "status": 200,
            "msg":"删除成功"
        })

学生删除所有老师

from rest_framework.views import APIView
from rest_framework.response import Response
from . import models
# 学生类
class StudentView(APIView):
    def delete(self, request):
        stuobj = models.Student.objects.filter(id=2).first()
        stuobj.stu.clear()
        return Response({
            "status": 200,
            "msg":"删除成功"
        })

15.3.1 多对多删除

多对多删除

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