Create CodeIgniter Sessions Migration

Migration Create Sessions

class Migration_Create_Sessions extends CI_Migration {

// The session table structure changed for CI 3.0
  public function up()
  {
    $fields = array(
     'id VARCHAR(40) DEFAULT \'0\' NOT NULL',
    'ip_address VARCHAR(45) DEFAULT \'0\' NOT NULL',
	  'timestamp INT(10) unsigned DEFAULT 0 NOT NULL',
	  'data blob NOT NULL'
    );



     $this->dbforge->add_field($fields);
    $this->dbforge->add_key('id', TRUE);
    $this->dbforge->create_table('ci_sessions');
  $this->db->query('ALTER TABLE `ci_sessions` ADD KEY `ci_sessions_timestamp` (`timestamp`)');  
  }


  public function down()
  {
    $this->dbforge->drop_table('ci_sessions');
  }

}