How to prevent Mongodb from modifying the inserted object?

Question

MongoDB

When an object is inserted into the database, a non-removable _id key is added to the original object. Is this behavior normal and how to get around it?

Answer 1

Due to the fact that this behavior is not documented, and no one knows the answer to the question, I am forced to use a crutch, namely deep copying using Before using, you need to make sure that the crutch is suitable specifically for your case, since there are too critical " but" JSON.parse(JSON.stringify(a))