public static function getRoot(BeforeAfterRubrics $model) { $root = $model->roots()->find(); if (!$root) { $model->name = 'Каталог BeforeAfter Дерево'; $model->url = 'RootTreeBeforeAfter'; $model->parent_id = 0; $model->level = 1; $model->saveNode(); $root = $model->roots()->find(); } return $root; }