# copy placeholders to params so we cal validate them
  $self->hook( around_action => sub {
      my ($next, $c, $action, $last) = @_;
      my $captures = $c->stash('mojo.captures');
      for my $key ( keys %{ $captures } ) {
          next if $key =~ m{\A(?:action|controller)\z};
          $c->validation->input->{$key} = $captures->{$key};
      }
      return $next->();
  } );