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function drafty_field_attach_load in Drafty 7

Implements hook_field_attach_load().

File

./drafty.module, line 91
Hook implementations and API functions for the Drafty module.

Code

function drafty_field_attach_load($entity_type, $entities, $age, $options) {

  // Entity API provides the function entity_revision_is_default() to determine
  // whether an entity was loaded with the default revision or not. However this
  // is not sufficient for two reasons.
  //  - It relies on entity_load() for core entities, which makes it unsafe to
  //    call within hook_entity_load() implementations. This can be useful when
  //    allowing drafts to be previewed in context such as listings.
  //  - The entity API implementation only tells you whether the entity was
  //    loaded with that revision or not, but not whether it was requested
  //    with the ID or with the revision explicitly specified.
  // Note that hook_field_attach_load() is the only hook in core where it is
  // possible to determine whether calling code requested a revision or not,
  // this information is not available to hook_entity_load(). Also note that
  // hook_field_attach_load() is cached when entities are loaded only be ID, but
  // since revision loads don't use the field cache it works fine for our
  // purposes.
  foreach ($entities as $entity) {
    $entity->_drafty_revision_requested = $age;
  }
}