我想要更新一条可能存在也可能不存在的记录。如果它不存在,那么什么都不会发生。
<小时/>我正在为 Node 使用 cassandra 驱动程序,收到错误
UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): ResponseError: Invalid unset value for column question_id
当尝试做类似的事情时
let question = {
question_part: ['How many times has Leicester Tigers won the Heineken Cup?'],
answer: ['2'],
tags: ['competition', 'rugby'],
title: 'Rugby pub quiz'
};
let query = 'update question set answer = ?, question_part = ?, tags = ?, title = ? where question_id = ?';
const params = [question.answer, question.question_part, question.tags, question.title, question.question_id];
cassandraClient.execute(query, params, {prepare: true});
在 table 上
CREATE TABLE question (
question_id timeuuid PRIMARY KEY,
answer list<text>,
cakes int,
created timestamp,
creator_display_name text,
creator_id text,
difficults int,
dislikes int,
drops int,
easies int,
favorites int,
impossibles int,
last_activity timestamp,
likes int,
question_part list<text>,
right_answers int,
tags set<text>,
title text,
views int,
wrong_answers int
)
最佳答案
- 更新您的问题定义以包含 Question_id。
- 更新您的查询以包含标题参数“更新问题集答案 = ?, Question_part = ?, Tags = ?, title = ?”其中 Question_id = ?'
关于node.js - 列 ID 的未设置值无效,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/48091387/