def get_article():
    form = json.loads(request.get_data(as_text=True))
    article = Article.find_by(chapter_id=form["chapter_id"])
    if article == None:
        article = Article()
        article.title = "空"
        article.content = "当前章节没有文章,请直接刷题"
        return Response(json.dumps(article.__dict__, ensure_ascii=False), content_type='application/json')
    else:
        return Response(json_util.dumps(article.__dict__, ensure_ascii=False), content_type='application/json')