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Homephp教程PHP源码ThinkPHP 使用 callback 自动验证字段唯一

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public $_validate = array(
        array('name', 'chkUniName', '英文代码已经存在.', self::EXISTS_VALIDATE, 'callback'),
 放在 CommonModel 中.
 //检查唯一
    public function chkUni($field){
        if(empty($field)){
            return false;
        }
        $map = array();
        $pk = $this->getPk();
        //如果有主键传入, 说明是编辑, 加入排除自己的条件.
        if(!empty($_REQUEST[$pk])){
           $map[$pk] = array('neq', intval($_REQUEST[$pk]));
        }
        $map[$field] = array('eq', trim($_REQUEST[$field]));
        if(null === $this->where($map)->find()){
            return true;
        }else{
            return false;
        }
    }
    //检查 name 是否存在
    protected function chkUniName(){
        return $this->chkUni('name');
    }

                   

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