/**
* @param \Notadd\Foundation\Database\Eloquent\Builder $query
* @param \Notadd\Foundation\Database\Eloquent\Builder $parent
* @return \Notadd\Foundation\Database\Eloquent\Builder
*/
public function getRelationCountQueryForSelfRelation(Builder $query, Builder $parent)
{
$query->select(new Expression('count(*)'));
$query->from($query->getModel()->getTable() . ' as ' . ($hash = $this->getRelationCountHash()));
$key = $this->wrap($this->getQualifiedParentKeyName());
return $query->where($hash . '.' . $this->getPlainForeignKey(), '=', new Expression($key));
}