Destroy all related OfficerAssignments when destroying a Shift

app/models/poll/shift.rb

@@ -12,6 +12,7 @@ class Poll
 
     before_create :persist_data
     after_create :create_officer_assignments
+    before_destroy :destroy_officer_assignments
 
     def persist_data
       self.officer_name = officer.name
@@ -29,5 +30,12 @@ class Poll
         Poll::OfficerAssignment.create!(attrs)
       end
     end
+
+    def destroy_officer_assignments
+      Poll::OfficerAssignment.where(booth_assignment: booth.booth_assignments,
+                                    officer: officer,
+                                    date: date,
+                                    final: recount_scrutiny?).destroy_all
+    end
   end
 end