django-cacheops-用于ORM缓存的python库，具有自动粒度事件驱动失效功能

django-cacheops是用于ORM缓存的python库，具有自动粒度事件驱动失效功能。

它使用redis作为ORM缓存的后端，并将redis或文件系统用于简单的时间无效的后端。

特点

django-cacheops还有更多的特点：

  • 装饰器以查询集或时间的形式缓存任何用户功能或视图

  • django和jinja2模板的扩展

  • 透明的交易支持

  • 狗堆预防机制

  • 使django更快

安装

使用pip安装：pip install django-cacheops或者直接下载django-cacheops的源代码包。

用法

自动缓存

它是自动的，您只需要进行设置即可。

手动缓存

您可以通过调用任何查询集的.cache()方法来强制其使用缓存：

在这里，您可以指定应为查询集缓存哪些操作，例如，以下代码：

将缓存计数调用，Paginator但不缓存以后的文章提取。有五个可能的行动- ，get，，和。您可以将此操作的任何子集传递给方法，甚至是空方法，以关闭缓存。但是，后者有一个捷径：fetchcountaggregateexists.cache()

当您要禁用特定查询集上的自动缓存时，此功能很有用。

您还可以使用覆盖特定查询集的默认超时.cache(timeout=...)。

设定

添加cacheops到您的中INSTALLED_APPS。

设置redis连接并为所需模型启用缓存：

CACHEOPS_REDIS = {    'host': 'localhost', # redis-server is on same machine    'port': 6379,        # default redis port    'db': 1,             # SELECT non-default redis database                         # using separate redis db or redis instance                         # is highly recommended    'socket_timeout': 3,   # connection timeout in seconds, optional    'password': '...',     # optional    'unix_socket_path': '' # replaces host and port}# Alternatively the redis connection can be defined using a URL:CACHEOPS_REDIS = "redis://localhost:6379/1"# orCACHEOPS_REDIS = "unix://path/to/socket?db=1"# or with password (note a colon)CACHEOPS_REDIS = "redis://:password@localhost:6379/1"# If you want to use sentinel, specify this variableCACHEOPS_SENTINEL = {    'locations': [('localhost', 26379)], # sentinel locations, required    'service_name': 'mymaster',          # sentinel service name, required    'socket_timeout': 0.1,               # connection timeout in seconds, optional    'db': 0                              # redis database, default: 0    ...                                  # everything else is passed to Sentinel()}# To use your own redis client class,# should be compatible or subclass cacheops.redis.CacheopsRedisCACHEOPS_CLIENT_CLASS = 'your.redis.ClientClass'CACHEOPS = {    # Automatically cache any User.objects.get() calls for 15 minutes    # This also includes .first() and .last() calls,    # as well as request.user or post.author access,    # where Post.author is a foreign key to auth.User    'auth.user': {'ops': 'get', 'timeout': 60*15},    # Automatically cache all gets and queryset fetches    # to other django.contrib.auth models for an hour    'auth.*': {'ops': {'fetch', 'get'}, 'timeout': 60*60},    # Cache all queries to Permission    # 'all' is an alias for {'get', 'fetch', 'count', 'aggregate', 'exists'}    'auth.permission': {'ops': 'all', 'timeout': 60*60},    # Enable manual caching on all other models with default timeout of an hour    # Use Post.objects.cache().get(...)    #  or Tags.objects.filter(...).order_by(...).cache()    # to cache particular ORM request.    # Invalidation is still automatic    '*.*': {'ops': (), 'timeout': 60*60},    # And since ops is empty by default you can rewrite last line as:    '*.*': {'timeout': 60*60},    # NOTE: binding signals has its overhead, like preventing fast mass deletes,    #       you might want to only register whatever you cache and dependencies.    # Finally you can explicitely forbid even manual caching with:    'some_app.*': None,}
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