Django RF，字段级验证，以检查请求用户是否为管理员

from django.db import models

class MyModel(models.Model):
    name = models.CharField(max_length=100)
    description = models.TextField()

from rest_framework import serializers
from .models import MyModel

class MyModelSerializer(serializers.ModelSerializer):
    class Meta:
        model = MyModel
        fields = ['id', 'name', 'description']

    def validate(self, data):
        request = self.context.get('request')
        if request and hasattr(request, 'user'):
            user = request.user
            if not user.is_authenticated or not user.is_staff:
                raise serializers.ValidationError("只有管理员可以执行此操作。")
        else:
            raise serializers.ValidationError("无法验证用户身份。")
        return data

from rest_framework import viewsets
from .models import MyModel
from .serializers import MyModelSerializer

class MyModelViewSet(viewsets.ModelViewSet):
    queryset = MyModel.objects.all()
    serializer_class = MyModelSerializer