如何使MongoDB查询结果只以value列表的形式返回？

Question

可不可以不显示key

Answer 1

Json is originally unordered and requires a key to identify its ownership. If there is no key, the ownership of the value cannot be determined, so such a function will not appear again.
It is more appropriate to meet your needs on the business side.

Answer 2

There should be none. In fact, this will not have much impact on your program. Just take the value.