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 %>

db/migrate/20161204220527_add_completed_at.rb

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+class AddCompletedAt < ActiveRecord::Migration[5.0]
+  def change
+    add_column :candidates, :completed_at, :datetime, after: :completed
+
+    Candidate.reset_column_information
+    Candidate.where(completed: true).each do |candidate|
+      candidate.completed_at = candidate.updated_at
+      candidate.save
+    end
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20161120175737) do
+ActiveRecord::Schema.define(version: 20161204220527) do
 
   create_table "answers", force: :cascade, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8" do |t|
     t.integer  "candidate_id"
@@ -32,6 +32,7 @@ ActiveRecord::Schema.define(version: 20161120175737) do
     t.string   "experience"
     t.integer  "recruiter_id"
     t.boolean  "completed"
+    t.datetime "completed_at"
     t.boolean  "reminded"
     t.datetime "created_at",                null: false
     t.datetime "updated_at",                null: false

test/fixtures/candidates.yml

@@ -57,6 +57,7 @@ richard: # Richard has completed AND submitted the test
   recruiter: recruiter
   quiz: fed
   completed: true
+  completed_at: <%= DateTime.current %>
   reminded: false
   test_hash: 6NjnourLE6Y
   review_status: 1
@@ -78,6 +79,7 @@ stacy: # Stacy has completed AND submitted the test
   recruiter: recruiter
   quiz: fed
   completed: true
+  completed_at: <%= DateTime.current %>
   reminded: false
   test_hash: s6oFExZliYYFx
   review_status: 2
@@ -89,6 +91,7 @@ henry: # Henry has completed AND submitted the test
   recruiter: recruiter
   quiz: fed
   completed: true
+  completed_at: <%= DateTime.current %>
   reminded: false
   test_hash: egPomAuVDeCEp
 
@@ -99,6 +102,7 @@ wade: # Wade has completed AND submitted the test
   recruiter: recruiter
   quiz: fed
   completed: true
+  completed_at: <%= DateTime.current %>
   reminded: false
   test_hash: BkSkpapJnkz2N