ID columns are bigint by default now

Author: mgriffin

lib/generators/github/ds/templates/migration.rb.tt

@@ -9,8 +9,6 @@ class CreateKeyValuesTable < ActiveRecord::Migration<%= migration_version %>
 
     add_index  <%= table_name %>, :key, :unique => true
     add_index  <%= table_name %>, :expires_at
-
-    change_column  <%= table_name %>, :id, "bigint(20) NOT NULL AUTO_INCREMENT"
   end
 
   def self.down