如何使用form_validation和CodeIgniter设置自定义错误消息

Question

i am newbie in CodeIgniter...and i am trying to do form validation for array input... the array name is pages[].

and i wrote:

$this->form_validation->set_rules('pages[]','','required');

if i use that:

$this->form_validation->set_message('required', 'you not selected pages.');

it will not change the other "required" validation input params?

So how can i set error message only for one validation?

Answer 1

It doesn't work like you stated, you should read this section of the user guide more carefully.

I'm not sure I can explain better, but the first field of the set_message method doesn't refer to the type of validation but to the callback function's name, that's the function which is doing the custom validation work.

What you need to do is define your callback function (the guide has a good example), in which you iterate through your array's elements and count what's checked. If at the end of the iteration the counter is 0 you set your error message.

Hope this helps.