Module: CatchCache::Flush

Defined in:
lib/catch_cache/flush.rb

Defined Under Namespace

Modules: ClassMethods

Class Method Summary collapse

Class Method Details

.included(klass) ⇒ Object 



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# File 'lib/catch_cache/flush.rb', line 4

def included(klass)
  klass.class_eval do
    extend ClassMethods

    define_method(:flush_cache!) do
      key_callbacks = ClassMethods.key_callbacks

      key_callbacks.keys.select{|key| key.to_s.split("__").last == self.class.name.underscore }.each do |key|
        # Get the uniq id defined in the AR model
        begin
          uniq_id = instance_exec(&key_callbacks[key])
          # Build the redis cache key
          cache_key = "#{key.to_s.split("__").first}_#{uniq_id}"
          redis = Redis.new
          # Flush the key by setting it to nil
          redis.set(cache_key, nil)
        rescue NameError => e
          # Nothing was flushed because of an error"
        end
      end
    end

    define_method(:flush_all!) do
      redis = Redis.new

      registered_keys = ClassMethods.key_callbacks.keys.map{|key| key.to_s.split("__").first.to_sym }.uniq
      removable_keys = redis.keys.select do |key|
        registered_keys.include?(key.gsub(/\_[0-9]+/, '').to_sym)
      end

      redis.del(removable_keys) if removable_keys.present?
    end
  end
end