小编web*_*pic的帖子

我有要求,我可以在新的添加功能中进行唯一值的验证

$this->form_validation->set_rules('email','Email','required|valid_email||is_unique[users.Email]');

它的工作,但在编辑功能,它不工作..我有写回调函数来检查唯一的电子邮件.这是我在编辑功能中编写的代码

$this->form_validation->set_rules('email','Email','required|valid_email|callback_check_email');

function check_username($email)
    { 
        $return_value = $this->user_model->check_email($email);
        if ($return_value)
        {
            $this->form_validation->set_message('email_check', 'Sorry, This username is already used by another user please select another one');
            return FALSE;
        }
        else
        {
        return TRUE;
        }
    }

和user_model

function check_mail($email)
    { 
        $sql = "SELECT users.Email
                FROM users
                WHERE 
                $email = users.Email
                ";

        $result = $this->db->query($sql)->result_array();
        return $result;

    }

我无法验证唯一的电子邮件