public function validate()
    {
        if (is_numeric($this->categoryId) && $this->categoryId >= 1
                && is_numeric($this->forumId) && $this->forumId >= 1
                && is_numeric($this->threadId) && $this->threadId >= 1
                && !empty($this->threadSlug)) {
            return true;
        }
        return false;
    }