1 files changed, 11 insertions, 1 deletions
diff --git a/app/models/activity.rb b/app/models/activity.rb
index fb99e1d..e70121e 100644
--- a/app/models/activity.rb
+++ b/app/models/activity.rb
@@ -1,6 +1,16 @@
 class Activity < ApplicationRecord
   include HasWhatnot
 
-  belongs_to :location
+  belongs_to :location, optional: true
   validates :gid, :name, :description, presence: true
+
+  def cost_string
+    requirements = []
+    data = self.whatnot[:cost]
+    return nil unless data
+    data[:items].each do |item_gid, quantity|
+      requirements.push "#{quantity} #{Item.find_by_gid(item_gid).name}"
+    end
+    requirements.join(", ")
+  end
 end