/** * @throws Exception */ public function beforeUpdate() { if ($this->node !== null && !$this->node->getIsNewRecord()) { $this->node->refresh(); } switch ($this->operation) { case self::OPERATION_MAKE_ROOT: if ($this->treeAttribute === false) { throw new Exception('Can not move a node as the root when "treeAttribute" is false.'); } if ($this->owner->isRoot()) { throw new Exception('Can not move the root node as the root.'); } break; case self::OPERATION_INSERT_BEFORE: case self::OPERATION_INSERT_AFTER: if ($this->node->isRoot()) { throw new Exception('Can not move a node when the target node is root.'); } case self::OPERATION_PREPEND_TO: case self::OPERATION_APPEND_TO: if ($this->node->getIsNewRecord()) { throw new Exception('Can not move a node when the target node is new record.'); } if ($this->owner->equals($this->node)) { throw new Exception('Can not move a node when the target node is same.'); } if ($this->node->isChildOf($this->owner)) { throw new Exception('Can not move a node when the target node is child.'); } } }