Not sure what to do with this so it's here if someone wants to use it, #152

lib/sidekiq/yaml_patch.rb

@@ -0,0 +1,21 @@
+# YAML marshalling of instances can fail in some circumstances,
+# e.g. when the instance has a handle to a Proc.  This monkeypatch limits
+# the YAML serialization to just AR's internal @attributes hash.
+# The paperclip gem litters AR instances with Procs, for instance.
+#
+# Courtesy of @ryanlecompte https://gist.github.com/007b88ae90372d1a3321
+#
+
+if defined?(::ActiveRecord)
+  class ActiveRecord::Base
+    yaml_as "tag:ruby.yaml.org,2002:ActiveRecord"
+
+    def self.yaml_new(klass, tag, val)
+      klass.unscoped.find(val['attributes'][klass.primary_key])
+    end
+
+    def to_yaml_properties
+      ['@attributes']
+    end
+  end
+end