% if ( stash 'errors' ) {
<p>Errors processing form:</p>
<ul class="errors">
    % for my $error ( @{ stash( 'errors' ) // [] } ) {
    <li><%= $error->{ message } %><% if ( $error->{ path } ) { %> (<%= $error->{ path } %>)<% } %></li>
    % }
</ul>
% }

%= form_for current_route() => begin
    %= csrf_field
    %= text_field 'title'
    %= text_field 'slug'
    %= text_area 'markdown'
    %= text_area 'html'
    %= submit_button
% end