论坛 › CodeIgniter 问答求助 › ar中如何让字段自加一呢

trynews 发表于 2008-12-29 18:59:26

ar中如何让字段自加一呢

我想让登录次数加一，如下好像不行，应是怎么用？

   $this->db->set('lastupdate',now());
   $this->db->set('loginnum','loginnum+1');
   $this->db->where('adminname',$username);
   $this->db->update('admin');

trynews 发表于 2008-12-29 21:08:06

解决了
$this->db->set('loginnum','loginnum+1',FALSE);

neversaylate 发表于 2009-2-17 11:13:57

set() will also accept an optional third parameter ($escape), that will prevent data from being escaped if set to FALSE. To illustrate the difference, here is set() used both with and without the escape parameter.

$this->db->set('field', 'field+1', FALSE);
$this->db->insert('mytable');
// gives INSERT INTO mytable (field) VALUES (field+1)

$this->db->set('field', 'field+1');
$this->db->insert('mytable');
// gives INSERT INTO mytable (field) VALUES ('field+1')

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