const countResult = await db.collection('todos').count() const total = countResult.total console.log(total) //total 为 6
const total = await db.collection('todos').count().total
console.log(total)
//total 为 null
谢谢！
This topic created in 2082 days ago, the information mentioned may be changed or developed.
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1
Vegetable Sep 4, 2020  1
试试加了括号的。
const total = (await db.collection('todos').count()).total 可以理解为，await 生效的那次调用，是最后一个点 |
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2
fuzhuo233 Sep 4, 2020
await 的优先级应该低于取 total 的值，而需要 await 先 resolve Promise，才能得到结果。话说优雅一点标准带语法糖不是用 const {total} = await db.collection('todos')
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3
keepeye Sep 4, 2020
await 右边表达式的结果
.count() 本身是异步的，要等 await 成功之后才能获取到 total |
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4
keepeye Sep 4, 2020
count().total 是错的 count()是个 Promise 对象
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5
azh7138m Sep 4, 2020
(await db.collection('todos').count()).total
await db.collection('todos').count().total 实际是 await undefined |
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