caching.rb in cached_resource-2.1.3

- old
+ new

@@ -79,11 +79,13 @@
 
       # Read a entry from the cache for the given key.
       # The key is processed to make sure it is valid.
       def cache_read(key)
         key = cache_key(Array(key)) unless key.is_a? String
-        object = cached_resource.cache.read(key).try(:dup)
+        object = cached_resource.cache.read(key).try do |cache|
+          cache.dup.tap { |o| o.instance_variable_set(:@persisted, cache.persisted?) if cache.respond_to?(:persisted?) }
+        end
         object && cached_resource.logger.info("#{CachedResource::Configuration::LOGGER_PREFIX} READ #{key}")
         object
       end
 
       # Write an entry to the cache for the given key and value.
@@ -100,6 +102,6 @@
         "#{name.parameterize.gsub("-", "/")}/#{arguments.join('/')}".downcase
       end
 
     end
   end
-end
\ No newline at end of file
+end