update sheet number

db/migrate/20140413122412_update_sheet_number.rb

@@ -0,0 +1,14 @@
+class UpdateSheetNumber < ActiveRecord::Migration
+  def self.up
+    Sheet.all.each do |s|
+      s.generate_sheet_number
+      s.save
+    end
+    
+    
+  end
+  
+  def self.down
+    
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20140410151036) do
+ActiveRecord::Schema.define(version: 20140413122412) do
 
   create_table "admins", force: true do |t|
     t.string   "email",                  default: "", null: false