lib/devise/strategies/rememberable.rb in devise-0.9.2 vs lib/devise/strategies/rememberable.rb in devise-1.0.0

@@ -8,10 +8,10 @@
     # authenticatable.
     class Rememberable < Devise::Strategies::Base
 
       # A valid strategy for rememberable needs a remember token in the cookies.
       def valid?
-        super && remember_me_cookie.present?
+        remember_me_cookie.present? && mapping.to.respond_to?(:serialize_from_cookie)
       end
 
       # To authenticate a user we deserialize the cookie and attempt finding
       # the record in the database. If the attempt fails, we pass to another
       # strategy handle the authentication.
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