think\model\Merge::delete PHP Метод

    public function delete()
    {
        if (false === $this->trigger('before_delete', $this)) {
            return false;
        }
        $db = $this->db();
        $db->startTrans();
        try {
            $result = $db->delete($this->data);
            if ($result) {
                // 获取主键数据
                $pk = $this->data[$this->getPk()];
                // 删除关联数据
                foreach ($this->relationModel as $key => $model) {
                    $table = is_int($key) ? $db->getTable($model) : $model;
                    $query = clone $db;
                    $query->table($table)->where($this->fk, $pk)->delete();
                }
            }
            $this->trigger('after_delete', $this);
            $db->commit();
            return $result;
        } catch (\Exception $e) {
            $db->rollback();
            throw $e;
        }
    }