I get this error as I was doing my work. How do I fix this fatal error?

Fatal error: Call to undefined function entity_view_mode_prepare() in .sites/all/modules/field_collection/field_collection.entity.inc on line 600

  • 2
    Make sure you're using a recent release of Drupal (that function was added in 7.33) and make sure field collection is up to date. If that doesn't fix it, we'll need some more details – Clive Dec 7 '16 at 22:46
  • What happened did you do before this happened? – Chris Happy Dec 7 '16 at 23:37

This error has been removed in latest drupal 7 versions. Please upgrade your drupal core version to the latest.

Temporary solution: Copy and paste the below function in includes/common.inc file

function entity_view_mode_prepare($entity_type, $entities, $view_mode, $langcode = NULL) {
if (!isset($langcode)) {
$langcode = $GLOBALS['language_content']->language;

// To ensure hooks are never run after field_attach_prepare_view() only
// process items without the entity_view_prepared flag.
$entities_by_view_mode = array();
foreach ($entities as $id => $entity) {
$entity_view_mode = $view_mode;
if (empty($entity->entity_view_prepared)) {

  // Allow modules to change the view mode.
  $context = array(
    'entity_type' => $entity_type,
    'entity' => $entity,
    'langcode' => $langcode,
drupal_alter('entity_view_mode', $entity_view_mode, $context);

$entities_by_view_mode[$entity_view_mode][$id] = $entity;

return $entities_by_view_mode;
  • 1
    Hi @Neeraj, thank you for the tip. It is highly discouraged to alter core files however, maybe you can provide instructions on how to deal with this error in another way? – Wim Mostrey Mar 6 '17 at 8:23
  • Please upgrade Drupal version to the latest then if you want get rid off this error. All cores files will be upgraded. This was just quick fix. – Neeraj Mar 6 '17 at 8:41
  • You can do this like below: 1. Create a directory on the site root(Next to includes) named as custom_include(in my case) 2. Create a file "custom_includes.inc" in that folder. 3. Now copy/define your function in this file 4. Load this file with the help of your custom existing module in hook_init function. require_once DRUPAL_ROOT . '/custom_includes/custom_common.inc'; 5. This file will be loaded in all over the project. – Neeraj Mar 6 '17 at 11:05

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