openproject/app/views/issues/_history.html.erb

<%# Uses a cache to render the history. The placeing of this object
is somewhat arbitrary. The important point is that it is not instantiated within
a journal as the cache could then not be used between all of an issue's journals. %>

<% @journal_cache = Acts::Journalized::JournalObjectCache.new %>

<% for journal in journals %>
  <%= render_journal issue,
                     journal,
                     :edit_permission => :edit_issue_notes,
                     :edit_own_permission => :edit_own_issue_notes,
                     :cache => @journal_cache %>
  <%= call_hook(:view_issues_history_journal_bottom, { :journal => journal }) %>
<% end %>

<% heads_for_wiki_formatter if User.current.allowed_to?(:edit_issue_notes, issue.project) || User.current.allowed_to?(:edit_own_issue_notes, issue.project) %>