Does Rails 3 provide time based caching?

rubyonrails-talk
1

Hi guys,

I need a timebased caching of certain pages. Cache for certain page should be cleared each 15 minutes. Is that possible?

In Caching with Rails: An Overview — Ruby on Rails Guides manual I see that there is only manual cache clear methods, such as expire_page or expire_action.

Regards, Alexey

2

I don't think Rails provides time based caching. I also do not think it's needed. What are you trying to accomplish?

Lets say you have a page with list of products that you want to cache. The cache *only* needs to be updated if one of the products changes. Caching the page for an arbitrary amount of time is unnecessary.

If you *really* need a time based cache, you could just use a cache, then set the expire action as a cron job that runs every 15 minutes.

But really, infinite caching with proper expiration is the way to go.

3

This depends on the cache store you use. The memcached store can expire cache items after a certain time.

See point 4 here:

http://guides.rubyonrails.org/caching_with_rails.html#cache-stores