Module: CompressedAttributes::ClassMethods

Defined in:
lib/compressed_attributes.rb

Instance Method Summary collapse

Instance Method Details

#has_compressed_attributes(compressed_attribute_names = []) ⇒ Object 



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# File 'lib/compressed_attributes.rb', line 21

def has_compressed_attributes( compressed_attribute_names=[] )
  class_eval do
    compressed_attribute_names = [compressed_attribute_names] if compressed_attribute_names.is_a? Symbol

    compressed_attribute_names.each do |attribute_name|
      define_method("#{attribute_name}=".to_sym) do |new_value|
        # Designates GZIP [http://www.gzip.org/zlib/rfc-gzip.html]
        if new_value != nil && new_value[0..1].bytes != [31,139]
          new_value = new_value.gzip
        end

        if defined?(super)
          super(new_value)
        else
          instance_variable_set("@#{attribute_name}".to_sym, new_value)
        end
      end

      define_method(attribute_name.to_sym) do
        if respond_to?(:read_attribute)
          return nil if read_attribute(attribute_name.to_sym).nil?
          read_attribute(attribute_name.to_sym).gunzip #rescue nil
        else
          return nil if instance_variable_get("@#{attribute_name}".to_sym).nil?
          instance_variable_get("@#{attribute_name}").gunzip #rescue nil
        end
      end
    end
  end
end