后端接口

• 模型 models.py

  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='teacher')
  

• 路由 urls.py

  urlpatterns = [
      path('teacher/',views.TeacherView.as_view()),
  ]
  

• 反序列化 serializer.py

  from rest_framework import serializers
  from . import models
  # 反序列化
  class TeacherUnserializer(serializers.Serializer):
      id = serializers.IntegerField(required=False)
      student_id = serializers.ListField()
      # 添加
      def create(self,data):
          # 获取老师的id
          tid = data.pop('id')
          # 获取学生的id
          student_id = data.pop('student_id')
          # 获取老师的实例
          teacherobj = models.Teacher.objects.filter(id=tid).first()
          # 添加数据
          teacherobj.students.set(
              student_id
          )
          # 返回老师的实例
          return teacherobj
      # 更新
      def update(self, instance, validated_data):
          # 获取学生的id列表
          student_id = validated_data.get('student_id')
          # 更新数据
          instance.students.set(student_id)
          # 返回实例
          return instance
  

• 视图 views.py

  from rest_framework.views import APIView
  from rest_framework.response import Response
  from .seriliazers import *
  from . import models
  class TeacherView(APIView):
      # 添加
      def post(self,request):
          data = request.data
          obj = TeacherUnserializer(data=data)
          if obj.is_valid():
              obj.save()
              return Response({
                  "status":200
              })
          return Response({
              "status": 201
          })
      # 编辑
      def put(self,request):
          data = request.data
          tid = data.pop('id')
          print(tid)
          teacherobj = models.Teacher.objects.filter(id=tid).first()
          print(teacherobj)
          obj = TeacherUnserializer(instance=teacherobj,data=data)
          if obj.is_valid():
              obj.save()
              return Response({
                  'status':200,
                  'msg':'',
              })
          return Response({
              'status': 201,
              'msg': '',
          })
  

• 数据结构

  • 添加关系

    {
        "id":2,
        "student_id":[1,2,3]
    }
    

  • 编辑关系

    {
        "id":2,
        "student_id":[1,2,3]
    }