如何通过OneToOne关系在与用户模型相关的模型中保存使用Django信号发送的额外数据？

如何解决如何通过OneToOne关系在与用户模型相关的模型中保存使用Django信号发送的额外数据？

我正在尝试为Teacher模型创建注册功能。 Teacher模型通过OneToOne关系与Django的User模型相关。当我尝试保存序列化程序时，出现此错误-

/ peacher / create-teacher中的

IntegrityError

没有NULL约束失败：teacher_teacher.school_id_id

我的老师模型：

from django.contrib.auth.models import User
from django.core.validators import RegexValidator
from django.db import models
from django.db.models.signals import post_save
from django.dispatch import receiver

from school.models import School


class Teacher(models.Model):
    user = models.OneToOneField(User,on_delete=models.CASCADE)
    contact = models.CharField(max_length=10,validators=[RegexValidator(r'^\d{10}$')])
    school_id = models.ForeignKey(School,on_delete=models.CASCADE)

@receiver(post_save,sender=User)
def create_user_teacher(sender,instance,created,**kwargs):
    if created:
        Teacher.objects.create(user=instance) 

@receiver(post_save,sender=User)
def save_user_teacher(sender,**kwargs):
    instance.teacher.save()

TeacherCreateView：

class TeacherCreateView(APIView):
    def post(self,request):
        serializer = TeacherSerializer(data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data,status=status.HTTP_201_CREATED)
        return Response(serializer.errors,status=status.HTTP_400_BAD_REQUEST)

TeacherSerializer：

from django.contrib.auth.models import User
from rest_framework.serializers import ModelSerializer,EmailField,CharField
from rest_framework.validators import UniqueValidator


class TeacherSerializer(ModelSerializer):
    email = EmailField(required=True,validators=[UniqueValidator(queryset=User.objects.all())])
    password = CharField(min_length=8,write_only=True)

    def create(self,validated_data):
        user = User.objects.create(
            email=validated_data['email'],username=validated_data['username'],first_name=validated_data['first_name']
        )
        user.set_password(validated_data['password'])
        user.teacher.contact = validated_data['contact']
        user.teacher.school_id = validated_data['school_id']
        user.save()
        return user

    class Meta:
        model = User
        fields = ['email','username','password','first_name']

用于创建教师的JSON数据：

{
    "email":"[e-mail]","username":"teacher","password":"somepassword","first_name": "Teacher","contact":"1234567890","school_id":"school"
}

不同之处在于，电子邮件，名字和用户名已保存在站点管理员中，但未保存密码。而且在“教师”模型中也没有老师。