Drupal CCK field does not validate using hook_nodeapi

Question

I am trying to do a custom validation over link field in Drupal CCk. I am currently using Link Contributed module. So in my hook_nodeapi and case validate Notice that this value accept unlimited values this there is a foreach.

case 'validate':  
  if ($node->type == 'flow')  
  {  
      foreach ($node->field_post_twitter as $twitter_v)  
      {  
        $pattern = '/(http|https|ftp):[\/]{2}twitter\.com/i';  
          if (preg_match_all($pattern, $twitter_v['url']))  
          {  
            form_set_error('not working');  
          }  
       }  
  }  
break;

But its not validating, while if i put it in a normal php file it DOES work. Any ideas of what am i missing ?

Thanks

Lacking tracing in PHP, you could sprinkle around some "var_dumps()" troughout your code, to see, from high-to-low, if code is actually ran. Alternatively, install devel module and replace var_dump with dvm() and such helpers provided by devel module. "From high-to-low" means: check if the module is loaded at all, then if the function is called, then if your foreach runs and so on. — berkes

dobeerman dobeerman · Accepted Answer · 2011-04-13T12:59:29

You should to use hook_form_alter to altering validate array of current form and add into this array custom validate function.

function mymodule_form_alter(&$form, &$form_state, $form_id){
  switch($node->type){
    case 'test_node_form':
      $form['#validate'][] = 'my_custom_validate';
      break;
  }
}

function my_custom_validate($form, &$form_state){
  $values = $form_state['values'];
  if(/* conditions */){
    $message = t('Oops!');
    form_set_error('', $message);
  }
}

Drupal CCK field does not validate using hook_nodeapi

2 Answers