assign queue and other bug

app/models/dining_queue.rb

@@ -1,7 +1,9 @@
 class DiningQueue < ApplicationRecord
-
+    belongs_to :dining_facility, :optional => true
 	def self.generate_queue_no
-		queue_no = DiningQueue.all.count + 1
+	    today = DateTime.now.strftime('%Y-%m-%d')
+        dining_queues = DiningQueue.where("DATE_FORMAT(created_at,'%Y-%m-%d') = ? ", today).order("queue_no desc")
+		queue_no = dining_queues.count + 1
 		return queue_no	
 	end
-end
+end