How to list only root pages?

Question

I want to show only top level pages, without the dropdown. I am trying to set the depth to 0...

wp_nav_menu( array( 'theme_location' => 'primary', 'depth' => 0 ) );

But it generates:

<ul>
    <li class="current_page_item">
        <a href="http://www.test.com/" title="Home">Home</a>
    </li>
    <li class="page_item page-item-11">
        <a href="http://www.test.com/about/" title="About">About</a>
        <ul class='children'>
            <li><a></a></li>  <!-- All sub-pages -->
            <li><a></a></li>  <!-- I want to skip them -->
        </ul>
    </li>
</ul>

How can I list only the top level pages?

Answer 1

Try "depth"=>1. 0 means "unlimited".

Answer 2

As a workaround I found this code:

<ul>
    <li<?php if ( is_home() || is_single() || is_search() || is_archive() ) { echo ' class="current_page_item"'; } ?>><a href="<?php echo get_option('home'); ?>"><span>Home</span></a></li>
<?php
    wp_list_pages('title_li=&depth=1');
?>
</ul>

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