X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/a4a3227c634d8cfd54a23205be727e910032cbe9..694f3f5c05a37cdf6e70a164b0c8dd8171b97cda:/services/api/lib/serializers.rb

diff --git a/services/api/lib/serializers.rb b/services/api/lib/serializers.rb
index 41379f308f..e412f63f62 100644
--- a/services/api/lib/serializers.rb
+++ b/services/api/lib/serializers.rb
@@ -1,7 +1,13 @@
 require 'safe_json'
 
 class Serializer
+  class TypeMismatch < ArgumentError
+  end
+
   def self.dump(val)
+    if !val.is_a?(object_class)
+      raise TypeMismatch.new("cannot serialize #{val.class} as #{object_class}")
+    end
     SafeJSON.dump(val)
   end