Add optional boxfill phase to orders

app/models/supplier.rb

@@ -116,6 +116,11 @@ class Supplier < ActiveRecord::Base
     end
   end
 
+  # @return [Boolean] Whether there are articles that would use tolerance (unit_quantity > 1)
+  def has_tolerance?
+    articles.where('articles.unit_quantity > 1').any?
+  end
+
   protected
 
   # make sure the shared_sync_method is allowed for the shared supplier