framework/rbac/DbManager.php
public function removeAllRules()
    {
        if (!$this->supportsCascadeUpdate()) {
            $this->db->createCommand()
                ->update($this->itemTable, ['rule_name' => null])
                ->execute();
        }

        $this->db->createCommand()->delete($this->ruleTable)->execute();

        $this->invalidateCache();
    }
public function removeAllRules()
    {
        if (!$this->supportsCascadeUpdate()) {
            $this->db->createCommand()
                ->update($this->itemTable, ['rule_name' => null])
                ->execute();
        }

        $this->db->createCommand()->delete($this->ruleTable)->execute();

        $this->invalidateCache();
    }
{@inheritdoc}