I'm getting Object of class Zend\Db\Sql\Expression could not be converted
to string with the following code;
$select->join(*array*('tt' => 'discuss_thread_tag'),
'tt.tag_id = discuss_tag.tag_id',
*array*(),
'left')
->join(*array*('t' => 'discuss_thread'),
't.thread_id = tt.thread_id',
*array*(*new *Expression('COUNT(thread_id) AS thread_count')),
'left')
->join(*array*('m' => 'discuss_message'),
'm.thread_id = t.thread_id',
*array*(*new *Expression('MAX(post_time) AS last_post')),
//'*',
'left')
->group(*array*('discuss_tag.name', 'discuss_tag.slug',
'discuss_tag.description'));
seems ok if i remove the expressions.
what am i doing wrong?
