[英]Django DRF get request query param in custom decorator applied on a function in viewsets.ViewSet
In django rest framework when create a custom viewsets.ViewSet can we apply a custom decorator on a specific function in that ViewSet?在 django rest 框架中创建自定义视图集时,我们可以在该视图集中的特定 function 上应用自定义装饰器吗?
class UserViewSet(viewsets.ViewSet):
"""
Example empty viewset demonstrating the standard
actions that will be handled by a router class.
If you're using format suffixes, make sure to also include
the `format=None` keyword argument for each action.
"""
@permission_classes([IsAuthenticated])
@custom_decorator_1()
def list(self, request):
pass
@custom_decorator_2()
def create(self, request):
pass
@custom_decorator_3()
def retrieve(self, request, pk=None):
pass
def update(self, request, pk=None):
pass
def partial_update(self, request, pk=None):
pass
def destroy(self, request, pk=None):
pass
If yes then how can we get query parameters inside that custom decorator applied on a ViewSet?如果是,那么我们如何在 ViewSet 上应用的自定义装饰器中获取查询参数? Or is there any alternate solution to achieve this where I can apply multiple decorators on a ViewSet action?
或者是否有任何替代解决方案可以实现这一点,我可以在 ViewSet 操作上应用多个装饰器?
Right now I am trying to do it in this way:现在我正在尝试以这种方式做到这一点:
def custom_decorator():
"""
Decorator for views that checks that the user passes the given test,
redirecting to the log-in page if necessary. The test should be a callable
that takes the user object and returns True if the user passes.
"""
def decorator(view_func):
@wraps(view_func)
def wrapper(request, *args, **kwargs):
role = request.query_params['role']
return view_func(request, *args, **kwargs)
return wrapper
return decorator
Error received:收到错误:
AttributeError: 'UserViewSet' object has no attribute 'query_params'
AttributeError: 'UserViewSet' object 没有属性 'query_params'
Django provides a simple way to use decorators on class based views (this works for DRF as well): Django 提供了一种在基于 class 的视图上使用装饰器的简单方法(这也适用于 DRF):
from django.utils.decorators import method_decorator
@method_decorator(login_required) #replace login_required with your own decorator
def list(self, request):
pass
More info: https://docs.djangoproject.com/en/3.1/topics/class-based-views/intro/#decorating-the-class更多信息: https://docs.djangoproject.com/en/3.1/topics/class-based-views/intro/#decorating-the-class
But in your case, I would rather go for DRF own Permissions system ( https://www.django-rest-framework.org/api-guide/permissions/ ):但在你的情况下,我宁愿 go 用于 DRF 自己的权限系统( https://www.django-rest-framework.org/api-guide/permissions/ )
from rest_framework import permissions
class CustomerAccessPermission(permissions.BasePermission):
def has_permission(self, request, view):
return request.query_params['role'] == "admin" #or whatever as long as it is a boolean
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