Merge pull request #1221 from nishanthvijayan/commercial-missing-version

Check if commercial has versions before displaying commercial creator

app/views/proposals/_form.html.haml

@@ -40,6 +40,7 @@
                         - if can? :destroy, commercial
                           = link_to 'Delete', conference_program_proposal_commercial_path(@conference.short_title, @event.id, commercial.id),
                           :method => :delete, :data => { :confirm => 'Are you sure?' }, class: 'btn btn-danger'
+                    - if commercial.versions.any?
                       .text-right
                         = "added by "
                         = link_to_user(commercial.versions.last.whodunnit)