def generate_short_link(): form = UrlForm() username = current_user if current_user.is_authenticated: us_link = Url(url_link=form.url_link.data, user_id=username.id) us_link.create_short_link(form.url_link.data) db.session.add(us_link) db.session.commit() else: us_link = Url(url_link=form.url_link.data) us_link.create_short_link(form.url_link.data) db.session.add(us_link) db.session.commit()