Extracting a specific data part of a Field Collection Item

Question

I've been playing around with this for the better part of a few days now with no luck. Here is my Collection data:

Collection name: field_video_collection

Within the collection there is a field called: field_video_file_col

My fields print fine in my custom field-collection-item--field_video_collection.tpl.php template, I followed the documentation according to this issue to get my template name and I simply print the fields as <?php print render($content['field_video_file_col']); ?> etc... within that template.

Now for the fun part, I'd like to extract the fid for each field_video_file_col item in the collection in any given node and render it as a printed variable. I followed the answer in this question here on Stack but it does not seem to work for me. if I do:

print '<pre>';
var_dump(get_defined_vars());
print '</pre>';

I see I have this as part of the data available to me for field_video_file_col

["field_video_file_col"]=>
          array(1) {
            ["und"]=>
            array(1) {
              [0]=>
              array(12) {
                ["fid"]=>
                string(3) "888"

So it looks to me that the FID is 888 in this case and I want to render that in my template. My node preprocess function is as such:

function MYTHEME_preprocess_node(&$vars, $hook) {

    $entity_type = 'field_collection_item';
    $bundle_name = 'field_field_video_collection'; // Field name the collection is attached to
    $field_name = 'field_video_file_col'; // Field name within the field collection
    $video_file_fid = field_info_instance($entity_type, $field_name, $bundle_name);
    if ($video_file_fid) {
      $my_fid = $video_file_fid['fid'];
    }
}

The end result needed is that I need to render the variable in my field-collection-item--field_video_collection.tpl.php template as:

<?php print $video_file_fid; ?>

... but this does not seem to work. I've searched all over and tried many different incarnations of this code and combinations but still no joy.

Answer 1

I use Entity API when work with Field Collection Items. See: Programmatically create and update field collection with Entity API

To work with field collections can do smth like this:

// Wrap node with Entity API
$node_wrapper = entity_metadata_wrapper('node', $node);
// Get the first item from the muli-value field collection
$raw_collection = $node_wrapper->field_video_collection[0]->value();
// Wrap it with Entity API
$collection = entity_metadata_wrapper('field_collection_item', $raw_collection);
//dsm the old value
debug($collection->field_video_file_col->value());

If you already know your field_collection id you can just do:

$collection = entity_metadata_wrapper('field_collection_item', $fid);
//dsm the old value
debug($collection->field_video_file_col->value());

UPDATE:

use the code above in MYTHEME_preprocess_node

UPDATE 2:

So in your case it will be:

function MYTHEME_preprocess_node(&$vars, $hook) {
  if (empty($vars['nid'])) {
    return;
  }
  // Wrap node with Entity API
  $node_wrapper = entity_metadata_wrapper('node', $vars['nid']);
  // Get the first item from the muli-value field collection
  $raw_collection = $node_wrapper->field_video_collection[0]->value();
  // Wrap field collection with Entity API
  $collection = entity_metadata_wrapper('field_collection_item', $raw_collection);
  // print value
  $fid = $collection->field_video_file_col->value();
  debug($fid);
}

Also you can find answer at Understanding Field Collection Values

Answer 2

You may try this one. The first line gets the object, the second line the fid from it.

$field_video_col=current(current($vars["field_video_file_col"]));
$video_file_fid=$field_video_col['fid'];

Answer 3

The code from dropbucket might be helpful to get and prepare all the field collection's data into an array:

$fieldname = 'field_lorem_slides';

// Get the items
$slides = array();
foreach($vars[$fieldname] as $delta => $item_id){
    $data = field_collection_item_load($item_id['value']);
    if ($data)){
                $l = isset($data->language) ? $data->language : LANGUAGE_NONE;
        $slides[$delta] = array();

                // Get the field collection's data prepared in an array
                // Alternatively, you could do $slides[$delta] = $data; in order to get the full objects in the array 
        $slides[$delta]['lorem_image'] = '<img src="'.file_create_url($data->field_image[$l][0]['uri']).'">';
        $slides[$delta]['lorem_data'] = isset($data->field_heading[$l]) ? $data->field_heading[$l][0]['safe_value'] : null;
    }
}

// Send the information to the template file
// $vars['slides'] = $slides;