1 files changed, 33 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/types/serialize.rb b/activerecord/lib/active_record/types/serialize.rb
new file mode 100644
index 0000000000..7b6af1981f
--- /dev/null
+++ b/activerecord/lib/active_record/types/serialize.rb
@@ -0,0 +1,33 @@
+module ActiveRecord
+  module Type
+    class Serialize < Object
+
+      def cast(value)
+        unserialize(value)
+      end
+
+      def appendable?
+        true
+      end
+
+      protected
+
+      def unserialize(value)
+        unserialized_object = object_from_yaml(value)
+
+        if unserialized_object.is_a?(@options[:serialize]) || unserialized_object.nil?
+          unserialized_object
+        else
+          raise SerializationTypeMismatch,
+            "#{name} was supposed to be a #{@options[:serialize]}, but was a #{unserialized_object.class.to_s}"
+        end
+      end
+
+      def object_from_yaml(string)
+        return string unless string.is_a?(String) && string =~ /^---/
+        YAML::load(string) rescue string
+      end
+
+    end
+  end
+end
+\ No newline at end of file