gist: 135972


  
    
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              # app/models/util/cache.rb
 
class Util::Cache
  def self.increment(key, amount = 1)
    if (value = Rails.cache.read(key)).nil?
      Rails.cache.write(key, (value = amount))
    else
      Rails.cache.write(key, (value = value + amount))
    end
    
    return value
  end
  
  def self.decrement(key, amount = 1)
    if (value = Rails.cache.read(key)).nil?
      value = 0
    else
      Rails.cache.write(key, (value = value - amount))
    end
    
    return value
  end
end