How do you request posts from multiple authors in Wordpress?
According to this documentation, there is no official support: http://codex.wordpress.org/Function_Reference/query_posts - under the heading "Author Options".
However, digging through the source code shows otherwise: http://wordpress.taragana.net/nav.html?wp-includes/classes.php.html#query_posts .
$author_array = preg_split('/[,\s]+/', $q['author']);
for ($i = 1; $i < (count($author_array)); $i = $i + 1) {
$whichauthor .= ' '.$andor.' post_author '.$eq.' '.intval($author_array[$i]);
}
$whichauthor .= ')';
To see if the comma separated list is being used correctly, I would go and start throwing debug lines into the function WP_Query::get_posts()
. For example, what is the final value $whichauthor
?
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I think this is the correct way to do it:
function yclads_posts_where_followed_authors($where) {
global $wpdb;
$authors_ids = array(0,1,2,3);//array of authors IDs
if (count($authors_ids) > 0)
{
$where .= ' AND ' . $wpdb->posts . '.post_author IN(' . implode (',',$authors_ids) . ') ';
}
else
{
$where .= ' AND 1=2'; //do not return results
}
return $where;
}
add_filter('posts_where', 'posts_where_filter_authors');
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The query_posts () function is only intended to support a query for one author at a time. If you want to display multiple authors, I suggest trying one of the following:
- Create your own request to include multiple author IDs. You can use $ wpdb-> query () to run almost any SQL statement on the database, so you can definitely get a list of all posts by multiple authors, it just takes more work.
- The second option is to group posts by author and run a separate WordPress loop for each author ID. This loosens your content a bit, but you can preface each section with a short biography of the author. Here is some sample code for this site .
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This slightly different loop will run multiple times per page or post with different query parameters:
<?php $my_query = new WP_Query('author=9&post_status=publish&orderby=date'); ?>
<?php while ($my_query->have_posts()) : $my_query->the_post(); ?>
<a href="<?php the_permalink() ?>" title="<?php the_title(); ?>">
<?php the_title(); ?></a>
<?php endwhile; ?>
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