Outoftime Sunspot

I'd like it if sunspot supported overloading of attributes in the schema so that a setup would work even on models that don't implement every attribute. This would make it easier to use sunspot with some setups that use single table inheritance, etc.

The fix would be to just check the attribute before invoking it on line 17 of lib/sunspot/data_extractor.rb

class AttributeExtractor
  def initialize(attribute_name)
    @attribute_name = attribute_name
  end

  def value_for(object)
    object.send(@attribute_name)
  end
end

becomes

class AttributeExtractor
  def initialize(attribute_name)
    @attribute_name = attribute_name
  end

  def value_for(object)
    object.send(@attribute_name) if object.respond_to?(@attribute_name)
  end
end