failing spec from label created from factory

app/models/label.rb

@@ -176,7 +176,7 @@ class Label < ActiveRecord::Base
 
   def as_json(options = {})
     super(options).tap do |json|
-      json[:type] = self.type
+      json[:type] = self.try(:type)
       json[:priority] = priority(options[:project]) if options.key?(:project)
     end
   end