default result sorting to quiz submission descending

completes #85

app/controllers/admin/result_controller.rb

@@ -10,7 +10,9 @@ module Admin
 
     # TODO: Limit results to the quizzes current_user has access to
     def index
-      @candidates = Candidate.where(completed: true).includes(:recruiter)
+      @candidates = Candidate.where(completed: true)
+                             .includes(:recruiter)
+                             .order(:review_status, completed_at: :desc)
     end
 
     def view

app/controllers/quiz_controller.rb

@@ -35,7 +35,7 @@ class QuizController < ApplicationController
   private
 
     def complete_and_email
-      if current_candidate.update_attributes(completed: true)
+      if current_candidate.update_attributes(completed: true, completed_at: DateTime.current)
         current_candidate.build_reviews
         CandidateMailer.submitted(current_candidate).deliver_later
         RecruiterMailer.candidate_submitted(current_candidate).deliver_later

app/views/admin/result/index.html.erb

@@ -8,6 +8,7 @@
       <th>Test ID</th>
       <th>Experience</th>
       <th>Recruiter</th>
+      <th>Submitted on</th>
       <th>Interview?</th>
     </tr>
 
@@ -16,6 +17,7 @@
         <td><%= link_to candidate.test_hash, admin_result_path(candidate.test_hash) %></td>
         <td><%= candidate.experience %> years</td>
         <td><%= mail_to(candidate.recruiter.email) %></td>
+        <td><%= candidate.completed_at.strftime('%D') unless candidate.completed_at.nil? %></td>
         <td><%= candidate.interview? %></td>
       </tr>
     <% end %>