如何查看数据库中是否有其他用户具有相同的用户名- JWT Django REST身份验证

pip install django
pip install djangorestframework
pip install djangorestframework-jwt

# settings.py

# JWT配置
JWT_AUTH = {
    'JWT_SECRET_KEY': 'your-secret-key',
    'JWT_EXPIRATION_DELTA': datetime.timedelta(days=1),
    'JWT_ALLOW_REFRESH': True,
    'JWT_REFRESH_EXPIRATION_DELTA': datetime.timedelta(days=7),
}

# models.py

from django.contrib.auth.models import AbstractUser

class CustomUser(AbstractUser):
    # 添加自定义字段
    pass

# urls.py

from django.urls import path
from rest_framework_jwt.views import obtain_jwt_token

urlpatterns = [
    path('api/token/', obtain_jwt_token),
    # 其他URL配置...
]

# views.py

from rest_framework import status
from rest_framework.decorators import api_view
from rest_framework.response import Response
from .models import CustomUser

@api_view(['POST'])
def register_user(request):
    username = request.data.get('username')
    
    # 检查数据库中是否存在其他用户具有相同的用户名
    if CustomUser.objects.filter(username=username).exists():
        return Response({'error': '该用户名已被注册'}, status=status.HTTP_400_BAD_REQUEST)
    
    # 创建新用户
    # ...
    
    return Response({'success': '用户注册成功'}, status=status.HTTP_201_CREATED)