Rails cache get all values of a hash

Question

I have a rails application where I am implementing caching using memcached and dalli.

I am storing results in hash like this

Rails.cache.write("home_stays[#{home_stay['id']}]", home_stay, expires_in: 5.minutes)

I can fetch value for a particular homestay using it's id.

What I am confused about is how can I get all homestays from the cache.

If I run Rails.cache.fetch("home_stays"), I get nil.

Is there a way to get all values of a cached hash in rails ?

update: As per Chakreshwar's suggestion I have added following in homestay model.

  def self.home_stay_cache
    Rails.cache.fetch("all_home_stays",expires_in: 5.minutes) do
      all
    end
  end

On running HomeStay.home_stay_cache I get following

Cache read: all_home_stays ({:expires_in=>300 seconds})
Cache generate: all_home_stays ({:expires_in=>300 seconds})
NameError: undefined local variable or method `all' for Homestay:class

Chakreshwar Sharma · Answer 1 · 2017-02-21T08:07:01.617

0

Write the below in the model: I am assuming that you are in the HomeStay model

def self.home_stay_cache
    Rails.cache.fetch("all_home_stay", expires_in: 5.minutes) do
      all
    end
end

Then , you can fetch it like HomeStay.home_stay_cache

edited Feb 21 '17 at 08:07

answered Feb 21 '17 at 08:00

Chakreshwar Sharma

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Tried this and got Cache read: all_home_stays ({:expires_in=>300 seconds}) Cache generate: all_home_stays ({:expires_in=>300 seconds}) NoMethodError: undefined method `all' for # from (pry):13:in `block in index' – RamanSM Feb 21 '17 at 08:03
@RamanM: I just tried this in my model & its working , so I need your model to help u – Chakreshwar Sharma Feb 21 '17 at 08:44
Had gone for lunch. – RamanSM Feb 21 '17 at 09:24
check question now – RamanSM Feb 21 '17 at 09:26
You haven't used my complete code, You need to write the do block – Chakreshwar Sharma Feb 21 '17 at 10:36
Still no success ! – RamanSM Feb 22 '17 at 07:57

Rails cache get all values of a hash

1 Answers1