How to set _id to db document in Mongoose?

Question

I\'m trying to dynamically create _id\'s for my Mongoose models by counting the documents in the db, and using that number to create the _id (assuming the first _id is 0). H

Answer 1

Create custom _id in mongoose and save that id as a mongo _id. Use mongo _id before saving documents like this.

const mongoose = require('mongoose');
    const Post = new mongoose.Schema({
          title: String,
          content: String,
          tags: [ String ]
        }, { _id: false });

// request body to save

let post = new PostModel({
        _id: new mongoose.Types.ObjectId().toHexString(), //5cd5308e695db945d3cc81a9
        title: request.body.title,
        content: request.body.content,
        tags: request.body.tags
    });


post.save();