/**
* Return a collection of the child object, given the parent object.
* @param Model $model
* @param string|Model $child_object
* @return Collection
*/
public static function collection(Model $model, $child_object)
{
if ($child_object instanceof Model) {
$child_object = get_class($child_object);
}
$relationships = Relationship::children(get_class($model), $model->id, $child_object);
if ($relationships->isEmpty()) {
return with(new $child_object())->newCollection();
}
$ids = $relationships->pluck('child_id')->toArray();
return $child_object::whereIn('id', $ids)->orderBy(DB::raw('FIELD(`id`, ' . join(",", $ids) . ')'))->get();
}
