[Plugin: Query Multiple Taxonomies] wrong posts count

I made some debugging …
Inside widgets.php we have the function:

private function generate_lists( $taxonomies, $data )

the the get_terms function returns the correct number of posts …

$terms = $this->get_terms( $taxonomy );

but the walker mess up with the count inside:

$data_tax = array(
				'taxonomy' => $taxonomy,
				'title' => get_taxonomy( $taxonomy )->label,
				'term-list' => $walker->walk( $terms, 0 )
			);

I dont know how the Walker class works … If anyone can help ?

Another question: Is there a way to remove the terms that do not have any posts?

More debugging …

It seens the problem is in walkers.php:

QMT_Data_Container

function count() {
		$old_query = qmt_get_query();

		if ( $this->data['is-selected'] ) {
			return $GLOBALS['wp_query']->post_count;
		}

		// Considering previous choices
		if ( isset( $old_query[ $this->taxonomy ] ) ) {
			$query = $old_query;
			$query[$this->taxonomy] = $query[$this->taxonomy] . "+" . $this->term->slug;
		} else {
			$query = array_merge( $old_query, array( $this->taxonomy => $this->term->slug ) );
		}

		return QMT_Count::get( $query );
	}

I dont know how to fix the query, the query that is being generate is:

SELECT COUNT(*) FROM wp_posts WHERE 1=1 AND wp_posts.post_type = 'post' AND (wp_posts.post_status = 'publish' OR wp_posts.post_status = 'private') ORDER BY wp_posts.post_date DESC

Ok … I made a patch to walkers.php the counter is working for categories. I did not test with multiple taxonomies.

Replace function count() inside class QMT_Data_Container for this:

function count() {
		$old_query = qmt_get_query();

		if ( $this->data['is-selected'] ) {
			return $GLOBALS['wp_query']->post_count;
		}

		$query = array(
				'tax_query' => array(
						'relation' => 'AND'
				)
		);

		// Considering previous choices
		if ( isset( $old_query[ $this->taxonomy ] ) ) {
			$terms = explode('+', $old_query[ $this->taxonomy ]);
			$terms[] = $this->term->slug;
		} else {
			$terms = $this->term->slug;
		}

		$query['tax_query'][] = array (
				'taxonomy' => $this->taxonomy,
				'field' => 'slug',
				'terms' => $terms,
				'include_children' => 0,
				'operator' => 'AND'
		);

		return QMT_Count::get( $query );
	}

Now, how do I remove the categories that do not have posts ?

That seems to work. Commited:

https://github.com/scribu/wp-query-multiple-taxonomies/commit/9a1120dcbe11955e78d3fa95c3a354eb96411243

Now, how do I remove the categories that do not have posts ?

That should already be handled in QMT_Terms::get().

I do not recommend trying to remove parent categories that have non-empty child categories.