not getting the ops array after inserting into mongo db - node.js

Question

when am trying to move the image after inserting into mongo db using the function
var db = require('../config/dbconnect')
module.exports = {
//addProduct:(product,callback)=>
addProduct: (product, callback) => {
//console.log(product)
db.get().collection('product').insertOne(product).then((data) => {
console.log(data)
callback(data.ops[0]._id)
})
}
}
I am getting an error like:
{
acknowledged: true,
insertedId: new ObjectId("61054e43cffb994774d37ab0")
}
(node:6964) UnhandledPromiseRejectionWarning: TypeError: Cannot read property '0' of undefined
at E:\Nodejs\ecommerce\helpdesk\product_help.js:11:27
at processTicksAndRejections (internal/process/task_queues.js:95:5)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:6964) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:6964) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

Answer 1

This is error first callback. Try the second argument which is the result.
db.get().collection('product').insertOne(product).then((error,data)=>
{
console.log(data)
callback(data.ops[0]._id)
})

Answer 2

instead of callback(data.ops[0]._id).
Try:
db.get().collection('product').insertOne(product).then((data) => {
callback(data.insertedId)
})
.catch((err)=>console.log('venk error',err))
}