Mongoose cannot store

  node.js, question

The problem with using mongoose to store data is that I did not report an error, but I did not save the data and could not find the problem.

Before, when trying to store, a warning popped up:

Said that the promise will be removed and asked me to insert it into my Promise library.

So:

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Then, the stored logic is

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NewComment is the data to be stored, cb and fb are callback functions after success and failure
However, because it has not been stored, I did not call it first.

DAO is like this

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After exporting the newly created model, the storage logic is implemented

Resolved
The reason is not asynchronous

But on schema.pre

Next () must be called before storage