Details
Description
At present it is not possible to create a Drupal View with an event listing that represents (or filters) in the list view whether an event is fully booked or not. Hence it would be useful for an "Event Is Fully Booked" flag available to Drupal CiviCRM Views.
It is not a simple database query to return whether an event is full as it appears to require the logic contained in...
civicrm/CRM/Event/BAO/Participant.php / eventFull( $eventId, ... )
(note: This may also be a jolly worthwhile addition to the CiviCRM API (probably an additional ticket))