[Django rest_framework]将redis用作Django DRF缓存的问题

如何解决[Django rest_framework]将redis用作Django DRF缓存的问题

我正在尝试为其余框架打开redis缓存。

我的配置似乎正确。当我运行时，它报告一个错误。如下图：

Watching for file changes with StatReloader
Performing system checks...

Exception in thread django-main-thread:
Traceback (most recent call last):
  File "C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\site-packages\rest_framework\settings.py",line 177,in import_from_string
    return import_string(val)
  File "C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\site-packages\django\utils\module_loading.py",line 17,in import_string
    module = import_module(module_path)
  File "C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\importlib\__init__.py",line 127,in import_module
    return _bootstrap._gcd_import(name[level:],package,level)
  File "<frozen importlib._bootstrap>",line 1014,in _gcd_import
  File "<frozen importlib._bootstrap>",line 991,in _find_and_load
  File "<frozen importlib._bootstrap>",line 975,in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>",line 671,in _load_unlocked
  File "<frozen importlib._bootstrap_external>",line 783,in exec_module
  File "<frozen importlib._bootstrap>",line 219,in _call_with_frames_removed
  File "C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\site-packages\rest_framework_extensions\utils.py",line 6,in <module>
    from rest_framework_extensions.key_constructor.constructors import (
  File "C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\site-packages\rest_framework_extensions\key_constructor\constructors.py",line 4,in <module>
    from rest_framework_extensions.key_constructor import bits
  File "C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\site-packages\rest_framework_extensions\key_constructor\bits.py",line 3,in <module>
    from django.db.models.sql.datastructures import EmptyResultSet
ImportError: cannot import name 'EmptyResultSet' from 'django.db.models.sql.datastructures' (C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\site-packages\django\db\models\sql\datastructures.py)

During handling of the above exception,another exception occurred:

Traceback (most recent call last):
  File "C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\threading.py",line 932,in _bootstrap_inner
    self.run()
  File "C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\threading.py",line 870,in run
    self._target(*self._args,**self._kwargs)
  File "C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\site-packages\django\utils\autoreload.py",line 53,in wrapper
    fn(*args,**kwargs)
  File "C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\site-packages\django\core\management\commands\runserver.py",line 118,in inner_run
    self.check(display_num_errors=True)
  File "C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\site-packages\django\core\management\base.py",line 392,in check
    all_issues = checks.run_checks(
  File "C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\site-packages\django\core\checks\registry.py",line 70,in run_checks
    new_errors = check(app_configs=app_configs,databases=databases)
  File "C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\site-packages\django\core\checks\urls.py",line 13,in check_url_config
    return check_resolver(resolver)
  File "C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\site-packages\django\core\checks\urls.py",line 23,in check_resolver
    return check_method()
  File "C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\site-packages\django\urls\resolvers.py",line 408,in check
    for pattern in self.url_patterns:
  File "C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\site-packages\django\utils\functional.py",line 48,in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\site-packages\django\urls\resolvers.py",line 589,in url_patterns
    patterns = getattr(self.URLconf_module,"urlpatterns",self.URLconf_module)
  File "C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\site-packages\django\utils\functional.py",line 582,in URLconf_module
    return import_module(self.URLconf_name)
  File "C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\importlib\__init__.py",in _call_with_frames_removed
  File "D:\C_项目相关\PythonWeb\TakeMeHome\TakeMeHome\urls.py",line 20,in <module>
    from Website import views as views2
  File "D:\C_项目相关\PythonWeb\TakeMeHome\Website\views.py",line 155,in <module>
    class Cache_test(APIView,):
  File "D:\C_项目相关\PythonWeb\TakeMeHome\Website\views.py",line 158,in Cache_test
    @cache_response(timeout=60)
  File "C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\site-packages\rest_framework_extensions\cache\decorators.py",line 38,in __init__
    self.key_func = extensions_api_settings.DEFAULT_CACHE_KEY_FUNC
  File "C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\site-packages\rest_framework\settings.py",line 220,in __getattr__
    val = perform_import(val,attr)
  File "C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\site-packages\rest_framework\settings.py",line 166,in perform_import
    return import_from_string(val,setting_name)
  File "C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\site-packages\rest_framework\settings.py",line 180,in import_from_string
    raise ImportError(msg)
ImportError: Could not import 'rest_framework_extensions.utils.default_cache_key_func' for API setting 'DEFAULT_CACHE_KEY_FUNC'. ImportError: cannot import name 'EmptyResultSet' from 'django.db.models.sql.datastructures' (C:\Users\HUANG\AppData\Local\Programs\Python\python38\lib\site-packages\django\db\models\sql\datastructures.py).

**导入错误：无法为API设置“ DEFAULT_CACHE_KEY_FUNC”导入“ rest_framework_extensions.utils.default_cache_key_func”。

ImportError：无法从“ django.db.models.sql.datastructures”（C：\ Users \ HUANG \ AppData \ Local \ Programs \ Python \ python38 \ lib \ site-packages \ django \ db）中导入名称“ EmptyResultSet” \ models \ sql \ datastructures.py）。**

令人沮丧的是，我既是新手又是新秀，我无法解决它。而且我在互联网上找不到答案，只能尝试来到这里寻求帮助

版本：

Django：3.2.10
drf：3.11
版本：3.0.2（Windows版本）

我的设置：

CACHES = {
    'default':{
            'BACKEND': 'django_redis.cache.RedisCache','LOCATION': 'redis://127.0.0.1:6379/0',## if redis server has passwd，
                    # "LOCATION": "password@redis://127. 0.0.1:6379",'OPTIONS': {
                'CLIENT_CLASS': 'django_redis.client.DefaultClient',}
        },}

#
REST_FRAMEWORK_EXTENSIONS = {
    'DEFAULT_CACHE_KEY_FUNC':
      'rest_framework_extensions.utils.default_cache_key_func'
}

#views.py Like this：

from Users.serializers import UserAddrModelSerializer
from rest_framework_extensions.cache.decorators import cache_response
class Cache_test(APIView,):
    permission_classes = []
    throttle_classes = (AnonRateThrottle,UserRateThrottle)
    @cache_response(timeout=60)
    def get(self,request,*args,**kwargs):

        obj = UserAddress.objects.all()
        result = UserAddrModelSerializer(instance=obj,many=True).data
        return Response(result)

解决方法

此特定错误是由于drf-extensions与Django 3.1+尚不兼容引起的。（{drf-extensions是应用程序的依赖项之一；另外，您说您正在使用3.2.10，但3.2仍在开发中；撰写本文时，最新发行的版本是3.1.1） a commit to the drf-extensions project on GitHub解决了这个问题，但尚未发布。

您的一些选择：

检查您是否确实需要依赖项，如果不需要，请卸载它。根据您的缓存需求，仅使用Django的内置缓存框架就足够了。
将修复程序纳入我链接到您安装的依赖项的提交中（即，在本地修补库）。
同时将Django安装降级为3.0版（作为最后的手段）。

[Django rest_framework]将redis用作Django DRF缓存的问题

如何解决[Django rest_framework]将redis用作Django DRF缓存的问题

解决方法

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