Created
May 16, 2012 11:12
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Examples of low level caching
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class ApplicationController < ActionController::Base | |
protect_from_forgery | |
before_filter do | |
@categories = Rails.cache.fetch("global/categories", expires_in: 10.minutes) do | |
Category.where("posts_count > 0").all | |
end | |
end | |
end |
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class Place < ActiveRecord::Base | |
def flickr_place | |
flickr = FlickRaw::Flickr.new | |
@flickr_place ||= Rails.cache.fetch("places/#{self.id}-#{self.updated_at}/flickr/place_id", expires_in: 7.days) do | |
unless self.latitude.blank? || self.longitude.blank? | |
begin | |
places = flickr.places.findByLatLon(lat: self.latitude, lon: self.longitude) | |
if places.blank? | |
nil | |
else | |
places.first | |
end | |
rescue Exception => e | |
logger.info "Exception occurred fetching Flickr place ID: #{e.to_s}" | |
nil | |
end | |
end | |
end | |
end | |
end |
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Awesome, thanks Randy!
I'd made a few of those tweaks on my local code already after someone pointed them out yesterday, but I hadn't thought of using
.try
; I'm going to use that myself now, as it's quite a bit neater :D