Charlotte Williams

Can background tasks set timed tasks? Just like crontab time expression

12

Can background tasks set timed tasks? Just like crontab time expression

Transaction rollback seems to be unsuccessful

13

Below is my code ```python async with conn.transaction(force_rollback=True): transaction = await conn.transaction() try: query = user.insert().values(**row["data"]) await conn.execute(query=query) query_sms = ( user_sms.update() .where(user_sms.c.ccode == "code") .values(status=1) ) await conn.execute(query=query_sms) except...

页面渲染感觉没用，是怎么回事呢？

5

   上面是设置，但是并没有渲染。 是否是需要`chromedriver`呢？还是其他原因

关于node版本能用自己想要的特定版本么？

1

因为一直用的是8.11.0

``` Unhandled rejection Error: [object Object] at Object.ensureErrorObject (/home/jakehu/Web/second-hand-market/node_modules/bluebird/js/main/util.js:261:20) at Promise._rejectCallback (/home/jakehu/Web/second-hand-market/node_modules/bluebird/js/main/promise.js:472:22) at rejectFromThenable (/home/jakehu/Web/second-hand-market/node_modules/bluebird/js/main/thenables.js:70:17) at wrappedRejectedCallback (/home/jakehu/Web/second-hand-market/node_modules/avoscloud-sdk/lib/promise.js:416:21) at /home/jakehu/Web/second-hand-market/node_modules/avoscloud-sdk/lib/promise.js:348:7 at Function._.each._.forEach (/home/jakehu/Web/second-hand-market/node_modules/underscore/underscore.js:153:9) at Promise._.extend.reject (/home/jakehu/Web/second-hand-market/node_modules/avoscloud-sdk/lib/promise.js:347:7) at wrappedRejectedCallback (/home/jakehu/Web/second-hand-market/node_modules/avoscloud-sdk/lib/promise.js:432:17) at...