public function FieldInfo::getInstances in Drupal 7

Retrieves all active, non-deleted instances definitions.

Parameters

$entity_type: (optional) The entity type.

Return value

If $entity_type is not set, all instances keyed by entity type and bundle name. If $entity_type is set, all instances for that entity type, keyed by bundle name.

File

modules/field/field.info.class.inc, line 209

Class

FieldInfo

Provides field and instance definitions for the current runtime environment.

Code

public function getInstances($entity_type = NULL) {

  // If the full list is not present in "static" cache yet.
  if (!$this->loadedAllInstances) {

    // Read from persistent cache.
    if ($cached = cache_get('field_info:instances', 'cache_field')) {
      $this->bundleInstances = $cached->data;
    }
    else {

      // Collect and prepare instances.
      // We also need to populate the static field cache, since it will not
      // be set by subsequent getBundleInstances() calls.
      $this
        ->getFields();

      // Initialize empty arrays for all existing entity types and bundles.
      // This is not strictly needed, but is done to preserve the behavior of
      // field_info_instances() before http://drupal.org/node/1915646.
      foreach (field_info_bundles() as $existing_entity_type => $bundles) {
        foreach ($bundles as $bundle => $bundle_info) {
          $this->bundleInstances[$existing_entity_type][$bundle] = array();
        }
      }
      foreach (field_read_instances() as $instance) {
        $field = $this
          ->getField($instance['field_name']);
        $instance = $this
          ->prepareInstance($instance, $field['type']);
        $this->bundleInstances[$instance['entity_type']][$instance['bundle']][$instance['field_name']] = $instance;
      }

      // Store in persistent cache.
      if (lock_acquire('field_info:instances')) {
        cache_set('field_info:instances', $this->bundleInstances, 'cache_field');
        lock_release('field_info:instances');
      }
    }
    $this->loadedAllInstances = TRUE;
  }
  if (isset($entity_type)) {
    return isset($this->bundleInstances[$entity_type]) ? $this->bundleInstances[$entity_type] : array();
  }
  else {
    return $this->bundleInstances;
  }
}