adds relations to officer/booth assignments

app/models/poll/booth_assignment.rb

@@ -4,6 +4,7 @@ class Poll
     belongs_to :poll
 
     has_many :officer_assignments, class_name: "Poll::OfficerAssignment", dependent: :destroy
+    has_many :recounts, class_name: "Poll::Recount", dependent: :destroy
     has_many :officers, through: :officer_assignments
     has_many :voters
   end

app/models/poll/officer_assignment.rb

@@ -2,6 +2,7 @@ class Poll
   class OfficerAssignment < ActiveRecord::Base
     belongs_to :officer
     belongs_to :booth_assignment
+    has_one :recount
 
     validates :officer_id, presence: true
     validates :booth_assignment_id, presence: true