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1. stylecollision
   Member
   Posted 1 year ago #

   Hi there,

   i'm working on a project with heavy usage of features introduced in WordPress 3.0. In this very case i have a custom post type with custom taxonomies, which i want to show on a different site than they were created on.

   The Post Type exists on Blog 1 and i want to list the posts on Blog 3, which works like a charm. But the function get_the_term_list crashes when used on Blog3 - although the same code works on Blog 1.

   The error shown is: Catchable fatal error: Object of class WP_Error could not be converted to string in /var/www/web1/html/wp-content/themes/theme/page-type.php on line 53

   The code used to create the output is:

   <?php switch_to_blog(1);
   					$querystr = "SELECT *
   						FROM $wpdb->posts as wpost
   						INNER JOIN $wpdb->term_relationships  ON (wpost.ID = $wpdb->term_relationships.object_id)
   						INNER JOIN $wpdb->term_taxonomy ON ($wpdb->term_relationships.term_taxonomy_id = $wpdb->term_taxonomy.term_taxonomy_id)
   						AND $wpdb->term_taxonomy.taxonomy = 'bezug'
   						AND $wpdb->term_taxonomy.term_id IN (666)
   						WHERE wpost.post_status IN ('publish')
   						AND wpost.post_type = 'medien'
   						ORDER BY wpost.post_date DESC
   						LIMIT 0,10";
   					$medien = $wpdb->get_results($querystr, OBJECT); ?>
   					<?php if ( $medien ): ?>
                   <div class="inhalt presse">
                               <div class="medien">
                               <ul>
                               <?php foreach($medien as $post): setup_postdata($post); ?>
                               <li>
                               <div class="datum"><?php the_time('j. F Y'); ?></div>
                           	<h3><a href="<?php echo get_post_meta($post->ID, 'link', true);?>" title="<?php the_title(); ?>"><?php the_title(); ?></a></h3>
   	                        <?php echo get_the_term_list( $post->ID, 'quellen', '<div class="veranstaltungsart"><div class="legende">Veranstaltungsart</div><div class="wert">', ', ', '</div></div><div class="sauber"></div>' ); ?>
                               </li>
                               <?php endforeach;?>
                               </ul>
                               </div>
                   </div>
                           <?php endif; restore_current_blog(); wp_reset_query(); ?>

   The same code works perfectly on the original Blog where the content is created. But as soon as i transport the code to another Blog, the List of Terms refuses to work while everything else works perfectly.

   Can anybody help me on this one?

   Thanks a lot.

   Yours,

   Christian

2. fullofwin
   Member
   Posted 1 year ago #

   I just had the same problem, and the culprit in my case was a mismatch in the name of the taxonomy where it was defined with register_taxonomy() in functions.php. I had to correct the typo and recreate/reassign everything in the admin for the new (correctly spelled) taxonomy, then it worked perfectly.

3. stylecollision
   Member
   Posted 1 year ago #

   Finally found the solution: It seems to work, if the taxonomy is registered in the blog, where we're doing our query. E.g.:

   Im working in Blog 1, querying posts from Blog 2. The Taxonomy XY exists in Blog 2, but not in Blog 1. Once i add it to Blog 1, the Query works.

   Hope this helps somebody.

   For the search engines:

   "Invalid Taxonomy"

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