adds assigned_polls method to poll_officer

app/models/poll/officer.rb

@@ -6,5 +6,12 @@ class Poll
     validates :user_id, presence: true, uniqueness: true
 
     delegate :name, :email, to: :user
+
+    def assigned_polls
+      officer_assignments.includes(booth_assignment: :poll).
+                               map(&:booth_assignment).
+                               map(&:poll).uniq.compact.
+                               sort {|x, y| y.ends_at <=> x.ends_at}
+    end
   end
 end