hstored.rb

module HStored
  module ClassMethods
    def field(key, options = {})
      key = key.to_s

      scope "has_#{key}", lambda { |value| where("properties @> (? => ?)", key, value) }

      define_method(key) do
        return options[:default] if options[:default] && !(properties && properties[key])
        property = properties && properties[key]
        if options[:type] && options[:type] == Date
          begin
            property = property.to_date if property
          rescue
            property = nil
          end
        elsif options[:type] && options[:type] != String
          property = eval(property.to_s) if property
        end

        property
      end

      define_method("#{key}_before_type_cast") do
        return options[:default] if options[:default] && !(properties && properties[key])
        property = properties && properties[key]
        property
      end

      define_method("#{key}=") do |value|
        self.properties = (properties || {}).merge(key => value)
      end
    end
  end
  
  module InstanceMethods
    
  end
  
  def self.included(receiver)
    receiver.extend         ClassMethods
    receiver.send :include, InstanceMethods
  end
end