Convert string array into object Id array

Question

I have an array of string

let stringObjectIdArray = ['fssdlfsd343','43434234242','342424242']

and I want to change the string array into an object Id array by using mongoose type but it didn't work. It only works for a string not array type.

let objectIdArray = mongoose.Types.ObjectId(stringObjectIdArray)
// above will give error

Is there a way to help me in this case? Thank you very much for helping me!

Robby Cornelissen · Accepted Answer · 2023-10-11 01:21:18Z

18

Use Array.prototype.map() to invoke the method on every element of the array and collect the results into a new array:

const objectIdArray = stringObjectIdArray.map(s => new mongoose.Types.ObjectId(s));

answered Jun 22, 2018 at 3:01

Robby Cornelissen

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2 Comments

Thank you so much!

better add "new" before the ObjectId class

Allaoua Benchikh · Accepted Answer · 2021-04-12 09:26:51Z

1

You can also simplify the accepted answer like this :

let objectIdArray = stringObjectIdArray.map(mongoose.Types.ObjectId);

answered Apr 12, 2021 at 9:26

Allaoua Benchikh

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depends on the node version and configuration, you might get this error: TypeError: Class constructor ObjectId cannot be invoked without 'new'