Laravel: wie um auszudrücken, DASS GRAF in eloquenter

Wie kann ich zum Ausdruck bringen, diese Abfrage in Laravel?

SELECT `projects_issues`.* FROM `projects_issues` 

 JOIN `projects_issues_tags` 
    ON `projects_issues_tags`.`issue_id` = `projects_issues`.`id` 

 JOIN `tags` 
    ON (`tags`.`id`  = `projects_issues_tags`.`tag_id`) 

WHERE `project_id` = '1' 
AND `tags`.`tag` IN('tagname1','tagname2')

GROUP BY `projects_issues`.`id` 
HAVING COUNT(DISTINCT `tags`.`tag`) = 2

ORDER BY `projects_issues`.`updated_at` DESC

Recht jetzt mein code ist dieser.
`

$issues = \Project\Issue::with('tags');

        if ($tags || $sort_by != 'updated')
        {
            $issues = $issues
                ->join('projects_issues_tags', 'projects_issues_tags.issue_id', '=', 'projects_issues.id')
                ->join('tags', 'tags.id', '=', 'projects_issues_tags.tag_id');
        }

        $issues = $issues->where('project_id', '=', Project::current()->id);

        if ($tags)
        {
            $tags_collection = explode(',', $tags);
            $tags_amount = count($tags_collection);

            $issues = $issues->where_in('tags.tag', $tags_collection);//->get();
        }

        $issues = $issues
            ->group_by('projects_issues.id')
            ->order_by($sort_by_clause, $sort_order);

        if($tags && $tags_amount>1){
            $issues = $issues->having('count', '=', $tags_amount);
        }

        $issues = $issues->get(array('projects_issues.*'));

Es gibt diesen Fehler zurück: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'count' in 'having clause'