cakephp增删改查

增

$this->create();
$ret = $this->save($data);

删

$ret = $this->deleteAll(array('user_id'=>$user_id,'stock_code'=>$code));

改

改其实和增加没有太大区别，只要save的时候带上id就好了，如：
$data = array('id'=>,'name'=>'huahua');
$this->save($data);

查

$list = $this->find('all', array('conditions'=>array('user_id'=>$user_id)));