Update all contact code to upcase

db/migrate/20150505111437_upcase_all_contact_codes.rb

@@ -0,0 +1,14 @@
+class UpcaseAllContactCodes < ActiveRecord::Migration
+  def change
+    puts 'Update contact code to upcase...'
+    @i = 0
+    puts @i
+    Contact.find_in_batches(batch_size: 10000) do |batch|
+      batch.each do |c|
+        c.update_column(:code, c.code.upcase)
+      end
+      GC.start
+      puts @i += 10000
+    end
+  end
+end