object id in mongodb code example

Example 1: what is objectid in mongodb

var ObjectId = require('mongodb').ObjectID
var id = new ObjectId();
console.log(id)

Example 2: what is objectid in mongodb

{
    "_id": ObjectId("54759eb3c090d83494e2d804")
}

Example 3: where id and id in mongodb

const p_id = patient_id;
    let fetchingReports = await Reports.aggregate([
      ...(p_id
        ? [
            {
              $match: {
                createdBy: mongoose.Types.ObjectId(id),
                patient_id: p_id,
              },
            },
          ]
        : [
            {
              $match: {
                createdBy: mongoose.Types.ObjectId(id),
              },
            },