Python Django-Rest-创建数据的框架更新用户

from django.db import models

class User(models.Model):
    username = models.CharField(max_length=100)
    email = models.EmailField()
    first_name = models.CharField(max_length=100)
    last_name = models.CharField(max_length=100)

from rest_framework import serializers
from .models import User

class UserSerializer(serializers.ModelSerializer):
    class Meta:
        model = User
        fields = ['id', 'username', 'email', 'first_name', 'last_name']

from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import status
from .models import User
from .serializers import UserSerializer

class UserDetailView(APIView):
    def put(self, request, pk):
        try:
            user = User.objects.get(pk=pk)
        except User.DoesNotExist:
            return Response(status=status.HTTP_404_NOT_FOUND)

        serializer = UserSerializer(user, data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

from django.urls import path
from .views import UserDetailView

urlpatterns = [
    path('users/<int:pk>/', UserDetailView.as_view(), name='user-detail'),
]