Putting an index on Person#diaspora_handle

app/models/person.rb

@@ -40,6 +40,8 @@ class Person
   validates_format_of :url, :with =>
     /^(https?):\/\/[a-z0-9]+([\-\.]{1}[a-z0-9]+)*(\.[a-z]{2,5})?(:[0-9]{1,5})?(\/.*)?$/ix
 
+  ensure_index :diaspora_handle
+
   def self.search(query)
     return Person.all if query.to_s.empty?
     query_tokens = query.to_s.strip.split(" ")