dunc

Hi bcworkz.

I got fed up and went on holiday, and with a fresh mind I’ve thought of a completely different way to achieve what we need. It’s a shame we didn’t resolve my original problem but hopefully someone will find use in this thread. Thank you for your help!

My solution:

I’ve added two custom fields to post_tags, an image (logo) and a custom URL for the page I want to link to (custom fields were added using plugin Ultimate Taxonomy Manager).

Then I can simply call the tags from the main post, including the custom URL, and display a list of links to those pages. This approach works for us because we’re only displaying a list of brand names which rarely change, so maintaining this is simple enough.

See it in action (at bottom of page):
http://www.livingsound.com.au/residential/smart-home-automation/

// Display a list of post_tags with a custom link and logo, if the custom URL is set (the custom fields 'logo' and 'custom_url' were added to post_tags using Ultimate Taxonomy Manager plugin)

global $post;

$tags = wp_get_post_terms( $post->ID , 'post_tag' );
if ($tags) {
  echo "<table>";
  foreach ($tags as $tag) {
    $customurl = xydac_cloud('post_tag', $tag->slug, 'custom_url');
    if (!empty($customurl)) {
?>
			<tr>
			<td width="170" class="brand-logo-td">
			<a href="<?php echo xydac_cloud('post_tag', $tag->slug, 'custom_url'); ?>" rel="bookmark" title=""><img src="<?php echo xydac_cloud('post_tag', $tag->slug, 'logo'); ?>" border="0" alt=""></a>
			</td>
			<td>
        	<h3><a href="<?php echo xydac_cloud('post_tag', $tag->slug, 'custom_url'); ?>" rel="bookmark" title=""><? echo $tag->name;?> » </a></h3>
			</td>
			</tr>
<?php
    }
  }
  echo "</table>";
}

Hi bcworks. You are a true teacher. 🙂

I’ve made the changes you suggested (and learnt more about arrays along the way).

Unfortunately it’s still not working and I can’t understand why.

I’ve changed to arrays and I took your point about mixing strings and arrays and have changed the post_type to an array also: array(‘brand’);

global $post;

$found_none = '<h2>No related posts found!</h2>';
$do_not_duplicate = array();
$do_not_duplicate[] = $post->ID;
$tags = wp_get_post_terms( $post->ID , 'post_tag' );
if ($tags) {
  $tag_array = array();
  foreach( $tags as $tag ) {
    $tag_array[] = $tag->term_id; // save the id in the array
  }
  foreach ($tags as $tag) {
    $myargs=array(
      'tag__in' => $tag_array,
      'post__not_in' => $do_not_duplicate,
      'post_type' => array('brand'),
      'posts_per_page'=>-1,
      'caller_get_posts'=>1
    );
    $my_query = new WP_Query($myargs);
    if( $my_query->have_posts() ) :
      while ($my_query->have_posts()) : $my_query->the_post(); $do_not_duplicate[] = $post->ID; ?>
        <h3><a href="<?php the_permalink() ?>" rel="bookmark" title="<?php the_title(); ?>"><?php the_title(); ?></a></h3>
        <?php $found_none = '';
      endwhile;
	  wp_reset_postdata();
	endif;
  }
}
if ($found_none) {
echo $found_none;
}
wp_reset_query(); // to use the original query again

print_r($tag_array); // for testing purposes to check tag ID array is working

Maybe it’s time for the teacher to take over. 😉

Thanks for all your help so far! We must be close!

Hi bcworkz

I went looking for an existing plugin that did what I needed but still couldn’t find anything.

So I’ve returned to my code and come up with this. I’m a bit closer now but it’s still not working:

global $post;
  $tags = get_the_tags(); // get an array of all the tags as objects.
  $tag_array = array();
  foreach( $tags as $tag ) {
    $tag_array[] = $tag->term_id; // save the id in an array
  }
  $tag_string = implode(",",$tag_array);
  $myargs = array(
	'tag__in' => array($tag_string),
	'post_type' => 'brand',
    'showposts'=>-1,
    'caller_get_posts'=>1
    );
        $brands = get_posts( $myargs );

        // The Loop
        foreach ($brands as $post) : setup_postdata($post);
            echo '<p>';
                the_title();
            echo '</p>';
        endforeach;

        // Reset Post Data
            wp_reset_postdata();    

echo $tag_string; // for testing purposes to check tag IDs are working

As you can see I’m extracting the post IDs properly now, and passing them to tag__in. The echo at the bottom shows my tag IDs are working.

The problem is the argument ‘post_type’ appears to be ignored by the loop. Instead I’m getting only a repeat of the current page (a ‘page’). See the bottom of:
http://www.livingsound.com.au/residential/smart-home-automation/

I wonder if the problem is that my global $post is a ‘page’? I’ve enabled tags for pages using this plugin:
http://ww.wp.xz.cn/plugins/tag-pages/

This person wonders if post_type being ignored is a bug:
http://ww.wp.xz.cn/support/topic/post_type-is-ignored-when-i-include-tag_in-in-my-get_posts-query

Thanks for you help! I’m way in over my head now!

– Duncan

I’m searching for a plugin option. Something like this would be great if it supported Custom Post Types:
http://ww.wp.xz.cn/plugins/posts-by-tag/

I’ve fixed it. There was a conflict with WP Example Content plugin, which I have now deactivated, and Mailing List settings have appeared in the Dashboard. 🙂

Here’s a post about a similar issue which led me to the solution.