<%= error_messages_for("wiki_page") %> <%= simple_form_for(@wiki_page) do |f| %> <%= f.input :title %> <%= f.input :body %> <% if CurrentUser.is_janitor? %> <%= f.input :is_locked %> <% end %> <%= f.button :submit, "Submit" %> <%= f.button :submit, "Preview" %> <% end %>