Select

# 此块代码同上
@app.route('/')
def index():
    # 当结果集为空时first()返回None，切片[0]的话抛出异常
    result = Article.query.filter(Article.title == 'a').all().first()
    for i in result:
        print('id: {} title: {} content: {}'.format(i.id, i.title, i.content))
    return 'Index.'

if __name__ == '__main__':
    app.run()