Change user identifier in user lists

Author: nygrenh

app/helpers/submissions_helper.rb

@@ -83,9 +83,9 @@ def handle_langs_chain(exception)
   def submissions_for_datatables(submissions)
     submissions.map do |sub|
       user_col = if can? :read, sub.user
-        link_to sub.user.login, participant_path(sub.user)
+        link_to sub.user.email, participant_path(sub.user)
       else
-        sub.user.login
+        'user'
       end
       [
         sub.created_at.strftime('%Y-%m-%d %H:%M'),

app/views/submissions/_list.html.erb

@@ -35,9 +35,9 @@
         <% if show_student_column %>
           <td>
             <% if current_user.id == submission.user.id || can_teach %>
-              <%= link_to submission.user.login, participant_path(submission.user) %>
+              <%= link_to submission.user.email, participant_path(submission.user) %>
             <% else %>
-              <%= submission.user.login %>
+              user
             <% end %>
           </td>
         <% end %>