proxy_class.rb

# mongo
def proxy_class
  return @proxy_class if defined?(@proxy_class)
  
  @proxy_class = 
    if many?
      if klass.embeddable?
        polymorphic? ? ManyEmbeddedPolymorphicProxy : ManyEmbeddedProxy
      else
        if polymorphic?
          ManyPolymorphicProxy
        elsif as?
          ManyDocumentsAsProxy
        elsif in_array?
          InArrayProxy
        else
          ManyDocumentsProxy
        end
      end
    elsif one?
      OneProxy
    else
      polymorphic? ? BelongsToPolymorphicProxy : BelongsToProxy
    end
end

# what i am thinking
def proxy_class
  return @proxy_class if defined?(@proxy_class)
  proxy_class_name.constantize
end

def proxy_class_name
  @using ||= klass.embeddable? ? :embedded : :link
  (many? ? 'Many' : 'One') + @using.to_s.classify + ('Polymorphic' if polymorphic?).to_s + 'Proxy'
end