Add field for user count

Signed-off-by: Julius Härtl <jus@bitgrid.net>

lib/Db/Card.php

@@ -36,6 +36,7 @@ class Card extends RelationalEntity {
 	protected $labels;
 	protected $assignedUsers;
 	protected $attachments;
+	protected $attachmentCount;
 	protected $owner;
 	protected $order;
 	protected $archived = false;
@@ -60,6 +61,7 @@ class Card extends RelationalEntity {
 		$this->addRelation('labels');
 		$this->addRelation('assignedUsers');
 		$this->addRelation('attachments');
+		$this->addRelation('attachmentCount');
 		$this->addRelation('participants');
 		$this->addResolvable('owner');
 	}

lib/Service/StackService.php

@@ -74,7 +74,7 @@ class StackService {
 				if (array_key_exists($card->id, $labels)) {
 					$cards[$cardIndex]->setLabels($labels[$card->id]);
 				}
-				$card->setAttachments($this->attachmentService->count($card->getId()));
+				$card->setAttachmentCount($this->attachmentService->count($card->getId()));
 			}
 			$stacks[$stackIndex]->setCards($cards);
 		}