浏览器延迟与django admin中的页面内容不同（缓存，python / django） [英] Browser delay with changing content of the page in django admin (caching, python/django)

问题描述

我在django的项目中有一些奇怪的问题，女巫缓存。

我可以在django-admin中编辑我的页面内容。当我这样做和刷新网站 - 没有发生任何事情。我必须等待几分钟的更改。有趣的是，当我更改浏览器（或电脑）时 - 我不必等待 - 更改已经开启。是django，浏览器还是什么问题？可以设置set.py以立即获取更改吗？

顺便说一句，我已经弄清楚，当我把
django.middleware.cache.FetchFromCacheMiddleware关闭 - 问题消失了，但我不想关闭缓存...

任何想法？

解决方案

是的。如果要保持网站整体的缓存，但是要确保缓存在更新或添加内容时清除，您可以实现django信号来检测添加/更新/删除事件并清除缓存。

Django信号 - https： //docs.djangoproject.com/en/dev/ref/signals/

以下是代码段示例： -

  from django.db.models.signals import post_save 
 
 @receiver（post_save，sender = BlogPost）
 def clear_cache发件人，实例，创建，** kwargs）：
如果instance.published_on不是无：
 cache.delete（'feed'）
  

在此示例中，每当BlogPost模型保存（添加或更新）时，$ code> feed 缓存将被删除。在你的情况下，你必须实现页面内容（这样的东西 cache.delete（'page-content'）并确定哪个对应的模型将是发件人，在保存时触发清除缓存。

I have a bit weird problem witch caching on my project in django.

I can edit my page-content in django-admin. When i do that and refresh site - nothing is happening. I have to wait few minutes for changes. Funny thing is that, when i change browser (or computer) - i dont have to wait - the changes are on. Is it the problem of django, browser or what? Is it possible to set setting.py to get changes immediately?

By the way, i have already figured out that when i turn the "django.middleware.cache.FetchFromCacheMiddleware" off - the problem disapears, but i dont want to turn cache off...

Any ideas?

解决方案

Yes. If you want to keep your site-wide cache on but you want to make sure that the cache gets cleared whenever your content is updated or added, you can implement a django signals to detect the add/update/delete event and clear the cache.

Django signals - https://docs.djangoproject.com/en/dev/ref/signals/

Here's a code snippet example:-

from django.db.models.signals import post_save

@receiver(post_save, sender=BlogPost)
def clear_cache(sender, instance, created, **kwargs):
    if instance.published_on is not None:
        cache.delete('feed')

In this example, whenever the BlogPost model is "saved" (added or updated), the feed key in the cache will be deleted. In your case, you will have to implement page-content (something like this cache.delete('page-content') and decide which corresponding model will be your sender that triggers the clearing of the cache when it is being saved.

这篇关于浏览器延迟与django admin中的页面内容不同（缓存，python / django）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！