Tag Archives: Co-Authors Plus

Allowing authors to set co-authors

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In the WordPress.org forums, whoaloic asks:

I have a site with multiple authors.
I would like to allow authors who create a post or a page to give rights to other authors.
For now, only administrator and editor can do that.
Is there a solution?

Yep, totally doable. By default, Co-Authors Plus defaults to ‘edit_others_posts’ as the required cap for changing co-authors. With the following code snippet in your theme’s functions.php file, you can make that cap ‘publish_posts’ instead (which authors and above usually have).

/**
 * Filter the Co-Authors Plus current_user_can_set_authors() function
 * so that users with 'publish_posts' can set Co-Authors
 *
 * @author danielbachhuber
 *
 * @see https://github.com/danielbachhuber/Co-Authors-Plus/issues/8
 * @see http://wordpress.org/support/topic/plugin-co-authors-plus-allow-authors-post-to-give-access-to-other-authors
 */
add_filter( 'coauthors_plus_edit_authors', 'db_filter_coauthors_edit_cap' );
function db_filter_coauthors_edit_cap( $cap_result ) {
	global $coauthors_plus;

	$post_type = $coauthors_plus->get_current_post_type();
	if( ! $post_type ) return false;
	
	$post_type_object = get_post_type_object( $post_type );
	return current_user_can( $post_type_object->cap->publish_posts );
}

In preparing this snippet, I also opened a couple of issues in Github:

Show biographies for co-authors at the end of your post

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In the WordPress.org forums, doubleedesign says:

I want to add the authors’ biographies to the end of each post.

Awesome… it’s pretty simple to do. Conceptually, what we need to do is load our co-authors, and then loop through printing the relevant information for each one.

You’ll want to put the following code snippet within The Loop in any template you’d like the bios to appear.

/**
 * Show multiple Co-Author biography fields at the bottom of a single post 
 * This snippet should be placed within The Loop
 */
if ( class_exists( 'coauthors_plus' ) ) {
	// Get the Co-Authors for the post
	$co_authors = get_coauthors();
	// For each Co-Author, echo a wrapper div, their name, and their bio if they have one
	foreach ( $co_authors as $key => $co_author ) {
		$co_author_classes = array(
			'co-author-wrap',
			'co-author-number-' . ( $key + 1 ),
		);
		echo '<div class="' . implode( ' ', $co_author_classes ) . '">';
		echo '<h4 class="co-author-display-name">' . $co_author->display_name . '</h4>';
		// Only print the description if the description exists
		if ( $description = get_the_author_meta( 'description', $co_author->ID ) )
			echo '<p class="co-author-bio">' . $description . '</p>';
		echo '</div>';
	}
}

If you’d like other co-author details to appear as well, like their avatar for instance, you can modify the output within the foreach loop.

Co-Authors Plus v2.6: Search user’s display names, change byline order and more

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Co-Authors Plus makes it easy to add multiple bylines to a given post, and has full support for custom post types. Out this evening, v2.6 has the following improvements:

  • Sortable authors — drag and drop the order of the authors as you’d like them to appear
  • Search for authors by display name so you can easily add bylines by first or last name
  • Option to remove the first author when there are two or more listed
  • More reliably generates the published post count for each user

Thanks to those in the forum who provided feedback and special thanks to Russell Heimlich for his contributions with sortable authors. If you feel like giving back, there are a few tickets open we’d love patches for. In particular, guest bylines would be pretty neat. I have a possible direction you can go if you’re looking for inspiration.

For our WordPress.com VIPs, this release will be available in the shared plugins directory in just a moment.

Co-authors in your RSS feeds

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In the WordPress.org forums, razorfrog asks:

Short of editing core WordPress code, is it possible to display the multiple authors in the site’s RSS feed?

Of course there is! From the source code, we know the RSS feed template uses the_author() to display the post’s byline information. Furthermore, the_author() echoes get_the_author() which is a filterable function. Filters allow us to programmatically change values used in a function. What we need to do is write a short snippet to produce the co-authors byline when an RSS feed is requested and Co-Authors Plus is activated.

The snippet is as follows, and can be placed in your theme’s functions.php file or a standalone MU plugin.

/**
 * Co-authors in RSS and other feeds
 * /wp-includes/feed-rss2.php uses the_author(), so we selectively filter the_author value
 */
function db_coauthors_in_rss( $the_author ) {

if ( !is_feed() || !function_exists( 'coauthors' ) )
   return $the_author;

return coauthors( null, null, null, null, false );
}
add_filter( 'the_author', 'db_coauthors_in_rss' );

How to use Co-Authors Plus with the Post Author Box

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Via a request in the WordPress.org forums, here’s an example of how you can extend the Post Author Box plugin with custom tokens:

/**
* Register token search values with Post Author Box
*/
function db_add_pab_search_values( $tokens ) {
$tokens[] = '%coauthors%';
$tokens[] = '%coauthors_posts_links%';
$tokens[] = '%coauthors_firstnames%';
return $tokens;
}
add_filter( 'pab_search_values', 'db_add_pab_search_values' );
/**
* Set replacement values for specific tokens with Post Author Box
*/
function db_add_pab_replace_values( $tokens ) {
if ( !function_exists( 'coauthors' ) )
return $tokens;
$tokens['%coauthors%'] = coauthors( null, null, null, null, false );
$tokens['%coauthors_posts_links%'] = coauthors_posts_links( null, null, null, null, false );
$tokens['%coauthors_firstnames%'] = coauthors_firstnames( null, null, null, null, false );
return $tokens;
}
add_filter( 'pab_replace_values', 'db_add_pab_replace_values' );

Basically, what you need to do is register the additional tokens on the “pab_search_values” filter, and then set values for each token on the “pab_replace_values” filter.

Feel free to put this in your theme’s functions.php file, or create an MU plugin for it.