I've been through the example and docs on this module and the fapi_validation module to see if I can understand how to validate a non-required text field which is also a multi-value field (either fixed or unlimited). I have tried using hook_form_alter() to achieve this without success. The site in question is Drupal 6 and the form is a node/add with various cck fields added.

Am I missing something obvious, here is my test code:

function MYMODULE_form_alter(&$form, &$form_state, $form_id) {
  if ($form_id == 'booking_node_form') {
    $form['field_code']['#rules'] = array('rule' => 'alpha_numeric', 'error' => 'Please only enter alpha numeric characters');
  }
}

Any thoughts?

Comments

Can you check the drupal.settings in the html to see what's in there

There's nothing for the field in question in the Drupal.settings - I had checked there but assumed that my code was wrong in some way. Do I need to make any changes considering this is not a required field (but still needs validating if it is provided, or that it is a multi-value text field?

Just as a test: if you make the field required, does it have your validation?

Making it required but leaving it as a multi-value field makes no difference. It gets validated as required but the new rule doesn't appear. Changing it to be a single value text field, both required and not also doesn't work. I'm sure I'm missing the obvious here but whichever way I try it I can't get it to validate a custom rule.

Thanks for the suggestions!

Looks like the rule is firing (although not perfectly) when i submit the form, just not when using JS with Clientside Validation.

Status:Active» Closed (works as designed)

No I hadn't thought this through before, I was expecting some magic pixie dust to make it work without having to write any more code. Silly me. I think I understand what I need to do now, apologies.