first time trying caching in Rails, don't even know where to begin -

first time trying implement caching app, , find confusing. after reading this indept article , still pretty lost.

i decided start out simple. in test app i'm making, have following chunk of api call.

def get_champion         champion_url = "#{base_url}/api/lol/static-data/na/v1.2/champion#{api_key}"         parse_json(champion_url)     end 

i think best place me cache because data returned call static.

what best method me cache here? there many caching techniques described in article, , don't know 1 use.

if there technique think should try implement, please let me know, , i'll try best implement it.

ps: right now, server logs says

completed 200 ok in 2860ms (views: 2858.6ms | activerecord: 0.3ms) 

which high, now?

edit: after reading through rails doc, thinking low-level cache might appropriate scenerio.

class product < activerecord::base   def competing_price     rails.cache.fetch("#{cache_key}/competing_price", expires_in: 12.hours)       competitor::api.find_price(id)     end   end end 

in code provided,it said cache_key needs generated. how did generate cache_key?

low-level caching work, believe resides in memory, , not persisted. if don't want keep in memory time, next best thing write disk , serve cached file whenever request made.

to that, you'll need add action_caching gem gemfile (only rails 4.0 , later):

gem 'actionpack-action_caching' 

then add following controller:

caches_action :get_champion 

that's it. first time request made, conduct full request , output cache file. subsequent requests retrieve cache file.

see https://github.com/rails/actionpack-action_caching more info.