·

6.685K

· teamon

Requirements

• rails
• redis-rails

class MyController
 def index
 render_cached_json("api:foos", expires_in: 1.hour) do
 Foo.all
 end
 end

 def render_cached_json(cache_key, opts = {}, &block)
 opts[:expires_in] ||= 1.day

 expires_in opts[:expires_in], :public => true
 data = Rails.cache.fetch(cache_key, {raw: true}.merge(opts)) do
 block.call.to_json
 end

 render :json => data
 end
end

This will store rendered json in redis, plain json, as string, as you should it should always do. Notice where is to_json and raw: true option. And you get HTTP cache headers for free

Why?

Because respond_with sucks and storing marshaled ActiveSupport::Cache::Entry object in redis is just damn stupid.

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