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1. Martin Black
   Member
   Posted 9 months ago #

   I am currently creating a theme wherein there are two lines on navigation (top and subnav). The top layer lists the categories, and the subnav appears when you hover over a top level menu item. The sub nav then displays tags from the category in the top menu.

   In order to do this I required a custom query which loads the tags for a specific category [taken from this thread]

   So in my functions I have this code:
   

   function get_category_tags($args) {
   	global $wpdb;
   	$tags = $wpdb->get_results
   	("
   		SELECT DISTINCT terms2.term_id as tag_id, terms2.name as tag_name, null as tag_link
   		FROM
   			wp_posts as p1
   			LEFT JOIN wp_term_relationships as r1 ON p1.ID = r1.object_ID
   			LEFT JOIN wp_term_taxonomy as t1 ON r1.term_taxonomy_id = t1.term_taxonomy_id
   			LEFT JOIN wp_terms as terms1 ON t1.term_id = terms1.term_id,
   
   			wp_posts as p2
   			LEFT JOIN wp_term_relationships as r2 ON p2.ID = r2.object_ID
   			LEFT JOIN wp_term_taxonomy as t2 ON r2.term_taxonomy_id = t2.term_taxonomy_id
   			LEFT JOIN wp_terms as terms2 ON t2.term_id = terms2.term_id
   
   		WHERE
   			t1.taxonomy = 'category' AND p1.post_status = 'publish' AND terms1.term_id IN (".$args['categories'].") AND
   			t2.taxonomy = 'post_tag' AND p2.post_status = 'publish'
   			AND p1.ID = p2.ID
   		ORDER BY tag_name
   	");
   	$count = 0;
   	foreach ($tags as $tag) {
   		$tags[$count]->tag_link = get_tag_link($tag->tag_id);
   		$count++;
   	}
   	return $tags;
   }

   and in my theme I simply use this to output and style the tags:
   

   <?php $args = array( 'categories' => '5' ); $tags = get_category_tags($args); ?>
   				<!-- echo and style tags -->
   				<?php 	$content .= "<span>";
   						foreach ($tags as $tag) {
   						$even_odd = ( 'odd' != $even_odd ) ? 'odd' : 'even';
   						$content .= "<a href=\"$tag->tag_link\" class=\"$even_odd\">$tag->tag_name</a>  |"; }
   						$content .= "</span>";
   						echo $content;
   				?>

   However, is there anyway I can modify this code so it outputs the tags in order of how many posts each tag has? I'm not overly familiar with SQL, but I believe I want to change the ORDER BY in my functions.php to sort by wp_term_taxonomy.count. Could anyone point me in the right direction?

   Thanks.

2. Martin Black
   Member
   Posted 9 months ago #

   Just in case anyone was wondering, I managed to fix this issue with this amended SQL in my functions.php

   function get_category_tags($args) {
   	global $wpdb;
   	$tags = $wpdb->get_results
   	("
   	SELECT DISTINCT terms2.term_id as tag_id, terms2.name as tag_name, null as tag_link, t2.count as post_total
   		FROM
   			wp_posts as p1
   			LEFT JOIN wp_term_relationships as r1 ON p1.ID = r1.object_ID
   			LEFT JOIN wp_term_taxonomy as t1 ON r1.term_taxonomy_id = t1.term_taxonomy_id
   			LEFT JOIN wp_terms as terms1 ON t1.term_id = terms1.term_id,
   
   			wp_posts as p2
   			LEFT JOIN wp_term_relationships as r2 ON p2.ID = r2.object_ID
   			LEFT JOIN wp_term_taxonomy as t2 ON r2.term_taxonomy_id = t2.term_taxonomy_id
   			LEFT JOIN wp_terms as terms2 ON t2.term_id = terms2.term_id
   
   		WHERE
   			t1.taxonomy = 'category' AND p1.post_status = 'publish' AND terms1.term_id IN (".$args['categories'].") AND
   			t2.taxonomy = 'post_tag' AND p2.post_status = 'publish'
   			AND p1.ID = p2.ID
   		ORDER BY post_total DESC
   	");
   	$count = 0;
   	foreach ($tags as $tag) {
   		$tags[$count]->tag_link = get_tag_link($tag->tag_id);
   		$count++;
   	}
   	return $tags;
   }

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