fixing repositories proxy

app/repositories/repositories_proxy.rb

@@ -11,17 +11,17 @@ module RepositoriesProxy
   end
 
   def respond_to?(method_name, include_private = false)
-    (method_name =~ /_repository/) || super
+    is_repository?(method_name) || super
   end
 
   private
 
   def is_repository?(method_name)
-    (method_name =~ /_repository/) && application_repository.include?(repository_name(method_name))
+    (method_name.to_s =~ /_repository/) && application_repository.include?(repository_name(method_name))
   end
 
   def repository_name(method_name)
-    method_name.split('_repository').first.to_sym
+    method_name.to_s.split('_repository').first.to_sym
   end
 
   def application_repository