<% if post_set.wiki_page %>

<%= format_text(post_set.wiki_page.presenter.excerpt) %>

Read the <%= link_to "full article", wiki_page_path(post_set.wiki_page.id) %>.

<% else %> <% if post_set.tag_string.present? %>

There is currently no wiki page for the tag "<%= post_set.tag_string %>". You can <%= link_to "create one", new_wiki_page_path(:wiki_page => {:title => post_set.tag_string}) %>.

<% end %> <% end %>