many class method for dynamically defining association methods

lib/trello/basic_data.rb

@@ -37,6 +37,19 @@ def self.register_attributes(*names)
       end
     end
 
+    def self.many(name, opts = {})
+      class_eval do
+        define_method(:"#{name}") do |*args|
+          options   = opts.dup
+          resource  = options.delete(:in)  || self.class.to_s.split("::").last.downcase.pluralize
+          klass     = options.delete(:via) || Trello.const_get(name.to_s.singularize.camelize)
+          params    = options.merge(args[0] || {})
+          resources = Client.get("/#{resource}/#{id}/#{name}", options).json_into(klass)
+          MultiAssociation.new(self, resources).proxy
+        end
+      end
+    end
+
     register_attributes :id, :readonly => [ :id ]
 
     def initialize(fields = {})