[Migration] Added duplicate check on columns in script 082

application/migrations/082_add_reset_pass_to_users.php

@@ -13,13 +13,20 @@ class Migration_add_reset_pass_to_users extends CI_Migration {
 
         public function up()
         {
+                if (!$this->db->field_exists('reset_password_code', 'users')) {
                         $fields = array(
                                 'reset_password_code varchar(50) DEFAULT NULL',
+                        );
+                        $this->dbforge->add_column('users', $fields);
+                }
+
+                if (!$this->db->field_exists('reset_password_date', 'users')) {
+                        $fields = array(
                                 'reset_password_date TIMESTAMP NULL DEFAULT NULL',
                         );
-
                         $this->dbforge->add_column('users', $fields);
                 }
+        }
 
         public function down()
         {