Can I determine if a string is a MongoDB ObjectID?

Question

I am doing MongoDB lookups by converting a string to BSON. Is there a way for me to determine if the string I have is a valid ObjectID for Mongo before doing the conversion?

Answer 1

@ross-u answer is just amazing.

I have chained the methods to do a full validation inline:

documentId = id && isValid(id) && new ObjectId(id) == id ? id : null

Note the double equal sign, which is VERY important as new ObjectId() does not return a string and strict comparison will return false when compared against a normal string (which I had coming in my logic).

The methods have been destructured from the mongoose object exposed by the require:

const {
  Types: {
    ObjectId: { isValid },
    ObjectId
  }
} = require("mongoose");