Module: RestApi::Cacheable::ClassMethods

Defined in:
app/models/rest_api/cacheable.rb

Instance Method Summary collapse

Instance Method Details

#cached ⇒ Object

Return an equivalent to this class that will may cache the defined results



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# File 'app/models/rest_api/cacheable.rb', line 15

def cached
  class_opts = cache_options
  if @cacheable
    self
  else
    parent = self
    Class.new(self) do
      #FIXME: prone to breaks, needs to be cleaner
      self.element_name = parent.element_name
      @cacheable = true
      @cache_opts = parent.cache_options

      def self.name
        superclass.name
      end
      def to_partial_path
        self.class.superclass._to_partial_path
      end

      eigenclass = (class << self; self; end)
      class_opts[:caches].each_pair do |m, opts|
        name = "#{m}_without_caching".to_sym
        opts ||= {}
        #puts "define method #{m} #{name}"
        eigenclass.class_eval do
          define_method m do |*args, &blk|
            key = cache_key_for(m, args)
            result = begin
              Rails.cache.fetch(key, class_opts.merge(opts)) do
                parent.send(m, *args, &blk).tap do |result|
                  opts[:before].call(result) if opts[:before]
                end
              end
            rescue ArgumentError, TypeError => e
              Rails.logger.warn e
              parent.send(m, *args, &blk)
            end
            opts[:after].call(result) if opts[:after]
            result
          end
        end
      end
    end
  end
end