I would like to change formatter of Field Collection Table, so that class added to a table row corresponds to a value of field of field collection item. As a first step, I would like to inspect theme function of that module. However, if I modify it to:

function theme_field_collection_table_multiple_value_field($variables) {
  $element = $variables['element'];
  $header = array();
  $cells = array();

  // Order field widgets by their widget weight.
  $instances = field_info_instances($element['#entity_type'], $element['#bundle']);
  uasort($instances, '_field_collection_table_sort_items_widget_helper');
  foreach ($instances as $field_name => $instance) {
    if (empty($element[$field_name])) {

    $header[] = _field_collection_table_get_title($element[$field_name]);
    $cells[] = array('data' => $element[$field_name]);

    // Remove the original field to prevent duplicate printing.

  $element['field_collection_table'] = array(
    '#theme' => 'table',
    '#header' => $header,
    '#rows' => array($cells),
    '#weight' => 0,

  $element['#sorted'] = FALSE;
  return drupal_render_children($element);

no krumo element is displayed. I cleared both opcache and drupal cache several times, but the problem persists. Also, I did deliberate error to make sure, that theme function applies. Do you know, what am I doing wrong?


If dpm($element) isn't returning output at that stage, you can log the data instead (temporarily) to the watchdog log.


watchdog('dev', '<pre>' . var_export($element, 1) .'</pre>');

You can then view it at Admin > Reports > Recent log entries

  • Thanks, I tried it. But again, there is no output. Perhaps I have a completely wrong approach, or expectations: I'm using Field Collection Table formatter for a field, entity is displayed using specific view mode by Views and the view content pane is displayed using Panels. Maybe I should try with fewer levels of abstraction? – Miloš Kroulík Sep 18 '15 at 6:14
  • If there's no output it's pretty likely the theme function isn't running @MilošKroulík. You can test definitively by adding die(); in there. If you still see the site, you know what's wrong – Clive Sep 18 '15 at 8:00
  • Thanks @Clive, I already made a deliberate error so I'm sure the theme function applies. I will update the answer. – Miloš Kroulík Sep 18 '15 at 8:05

I think you should initialize the $element variable as a array element before this part of code..

   **$element = array();**
     $element['field_collection_table'] = array(
        '#theme' => 'table',
        '#header' => $header,
        '#rows' => array($cells),
        '#weight' => 0,


  • Sorry, I don't understand. You're suggesting I should change the module code (the code above is copied directly from the module, except my dpm call) to make this work? That shouldn't be necessary, I think. – Miloš Kroulík Sep 18 '15 at 7:35
  • For good or bad, PHP doesn't require that you initialise arrays before accessing them as such, so this wouldn't make any difference, even if we ignore the fact that $variables['element'] is already an array – Clive Sep 18 '15 at 8:01
  • but you are unset the a $element that's why i thought and just for more specific coding standard I told you. – Aradhya Sep 18 '15 at 8:15

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