Node.js, MongoDB, why can't I make a request?

Question

MongoDB

The search for comments is performed by the id of the post sent by ajax, but for some reason returns an empty array:

Although it is clear that "1" is stored in the value of post_id
This is what happens when I replace it with a specific value: So what

's the problem, dear sages?
PS Thanks in advance for your replies!

Answer 1

If req.body.id came as a string, then it will not find anything, because In monga, data is stored in BSON, which is strongly typed. Do this:
PS screenshot code is a mockery of people who want to help you :)