/**
* Add the constraints for a relationship count query.
*
* @param \Illuminate\Database\Eloquent\Builder $query
* @param \Illuminate\Database\Eloquent\Builder $parent
* @return \Illuminate\Database\Eloquent\Builder
*/
public function getRelationCountQuery(Builder $query, Builder $parent)
{
$query = parent::getRelationCountQuery($query, $parent);
return $query->where($this->table . '.' . $this->morphType, $this->morphClass);
}