How to insert a doc into mongodb using mongoose and get the generated id?

Question

I\'m using mongoose to operate mongodb. Now, for testing, I want to inserting some data into mongodb by native connection.

But the question is how to get the generat

Answer 1

If you like using Promises:

const collection = conn.collection('aaa');
const instance = new collection({ a: 'abc' });
instance.save()
    .then(result => {
        console.log(result.id);  // this will be the new created ObjectId
    })
    .catch(...)

Or if you're using Node.js >= 7.6.0:

const collection = conn.collection('aaa');
const instance = new collection({ a: 'abc' });
try {
    const result = await instance.save();
    console.log(result.id);  // this will be the new created ObjectId
} catch(...)