fix n+1

app/views/submission_events/index.html.erb

@@ -20,7 +20,7 @@
           <% end %>
         </p>
       </li>
-      <% submitter_versions_index = @submission.submitters.each_with_object({}) { |s, h| h[s.id] = s.submitter_versions.to_a.sort_by(&:created_at) } %>
+      <% submitter_versions_index = @submission.submitters.preload(:submitter_versions).each_with_object({}) { |s, h| h[s.id] = s.submitter_versions.to_a.sort_by(&:created_at) } %>
       <% @submission.submission_events.order(:event_timestamp).each do |event| %>
         <% submitter = @submission.submitters.find { |e| e.id == event.submitter_id } %>
         <% bg_class = event_colors[submitters_uuids.index(submitter.uuid) % event_colors.length] %>

lib/submissions/generate_audit_trail.rb

@@ -438,7 +438,7 @@ module Submissions
 
       composer.text(I18n.t('event_log'), font_size: 12, padding: [10, 0, 20, 0])
 
-      submitter_versions_index = submission.submitters.each_with_object({}) do |s, h|
+      submitter_versions_index = submission.submitters.preload(:submitter_versions).each_with_object({}) do |s, h|
         h[s.id] = s.submitter_versions.to_a.sort_by(&:created_at)
       end