Set caches_action, :expires_in => dynamically

Question

Every example of caches_action I've seen looks like:

caches_action, :expires_in => 5.minutes

but I'd like to set expires_in based on the expiration time of an object used in the action. Is there any way to reference that object when setting expires_in since the object in question is based on params sent to the action?

I tried using

caches_action, :expires_in => Object.find(params[:id])

but alas it won't let me reference params there. Suggestions welcome!

score 2 · Accepted Answer · edited Feb 25 '16 at 17:09

2

Looks like you need to use a Proc which can get passed the params of the controller. Here is an example

caches_action :show, cache_path: Proc.new {|controller_instance| "some_cache_path_that_is_uniq/#{controller_instance.params[:id]}"}

edited Feb 25 '16 at 17:09

Developer

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answered Nov 10 '12 at 00:05

reillyse

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score 0 · Answer 2 · answered Mar 01 '12 at 17:53

0

The main point of action caching is to prevent actions being run every time a new request is coming in. Unless defined explicitly params are not taken into consideration.

If you want to cache based on instances I would suggest doing Conditional Gets.

answered Mar 01 '12 at 17:53

iltempo

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My `params[:id]` is part of the route - something like `/object/:id` - so it gets cached separately since the path is different. – swrobel Mar 01 '12 at 18:48

Set caches_action, :expires_in => dynamically

2 Answers2