无法显示第二页的问题

Question

我正在开发一个烧瓶应用程序，其中有两页分页的问题， 问题是点击数字 2 更改页面不会更改问题，我不知道应该由哪部分代码负责，如果需要任何代码片段来帮助解决此问题，请告诉我编辑问题。

后端

def paginate_questions(request, selection):
    page = request.args.get('page', 1, type=int)
    start = (page - 1) * QUESTIONS_PER_PAGE
    end = start + QUESTIONS_PER_PAGE

    questions = [question.format() for question in selection]
    current_questions = questions[start:end]

    return current_questions

    @app.route('/questions')
    def get_paginated_questions():
        categories = Category.query.order_by(Category.id).all()
        selection = Question.query.order_by(Question.id).all()

        current_questions = paginate_questions(request, selection)

        if len(current_questions) == 0:
            abort(404)

        return jsonify({
            'success': True,
            'questions': current_questions,
            'total_questions': len(selection),
            'current_category': None,
            'categories': {category.format()['id']: category.format()['type']
                           for category in categories}
            })

前端

  getQuestions = () => {
    $.ajax({
      url: `/questions`, //TODO: update request URL
      type: "GET",
      success: (result) => {
        this.setState({
          questions: result.questions,
          totalQuestions: result.total_questions,
          categories: result.categories,
          currentCategory: result.current_category })
        return;
      },
      error: (error) => {
        alert('Unable to load questions. Please try your request again')
        return;
      }
    })
  }

  selectPage(num) {
    this.setState({page: num}, () => this.getQuestions());
  }