如何使用Django Rest Framework实现Redis缓存？ [英] How to implement Redis Cache with Django Rest Framework?

问题描述

我需要在Django Rest Framework网站上实现Redis缓存。但是
当我使用带有类的cache_page装饰器进行负载测试时，每秒可以提高请求，但会出现错误函数对象没有属性'get_extra_actions'。

I need to implement Redis cache with my Django Rest Framework site. But when I do load test using cache_page decorator with a class it improves the request per second but an error occurs "'function' object has no attribute 'get_extra_actions'"

Views.py

@cache_page(CACHE_TTL)
class ParameterViewSet(viewsets.ModelViewSet):
    """
    Lists all the parameters present in the system.
    Can pass filter with parent set to null to get top level
    Parameters.
    """
    permission_classes = (IsAuthenticated,)
    queryset = Parameter.objects.all()
    filter_fields = ('parent', 'target_type',)

    serializers = {
        'default': ParameterSerializer,
        'list': ParameterSerializer,
        'detail': ParameterSerializer,
        'update': ParameterWriteSerializer,
        'create': ParameterWriteSerializer,
        'delete': ParameterWriteSerializer,
    }

    def get_serializer_class(self):
        return self.serializers.get(
            self.action,
            self.serializers['default'])

    def get_queryset(self):
        results = Parameter.objects.all().filter(weight__gt=0).order_by(
            'order_number')
        if 'no_parent' in self.request.query_params:
            return results.filter(parent=None)
        return results

在我的Settings.py中，我还添加了以下代码。

In my Settings.py, I have also added the below code.

CACHES = {
    'default': {
        'BACKEND': 'django_redis.cache.RedisCache',
        'LOCATION': 'redis://127.0.0.1:6379/',
        'OPTIONS': {
            'CLIENT_CLASS': 'django_redis.client.DefaultClient',
        }
    }
}

我也相应地添加了以下中间件

also i have add the below middleware accordingly

MIDDLEWARE = [
    'django.middleware.cache.UpdateCacheMiddleware',

    # place all other middlewares here

    'django.middleware.cache.FetchFromCacheMiddleware',
]

那也行不通。

推荐答案

从我的头顶开始，您就在使用 @cache_page（CACHE_TTL）在错误的位置以错误的方式。

Just from top of my head you are using the @cache_page(CACHE_TTL) at the wrong place and in the wrong way.

根据django docs'，您需要 cache_page 装饰器位于类的方法之上，而不是类本身，并且需要包装在 method_decorator 中。

According to django docs' you need the cache_page decorator to be above class' method not the class itself and it need to be wrapped in method_decorator.

如下所示覆盖 ParameterViewSet 的调度，它应该可以完成工作。 / p>

Overwrite ParameterViewSet's dispatch like below and it should do the job.

@method_decorator(cache_page(CACHE_TTL))
def dispatch(self, *args, **kwargs):
    return super().dispatch(*args, **kwargs)

文档：

• 装饰类


• 使用带有apiview和viewset的缓存

• Decorating the class
• Using cache with apiview and viewsets

这篇关于如何使用Django Rest Framework实现Redis缓存？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！