What is wrong with my Mongoose data seeding script? - node.js

Question

I am trying to populate my MongoDB database with data via a script (JS) that I run through npm run.
const mongoose = require('mongoose')
const dbConf = require('../config/database.js')
const User = require('../app/models/user.js')
const Account = require('../app/models/account.js')
mongoose.connect(dbConf.url, { useMongoClient: true })
mongoose.Promise = global.Promise
const users = [
{
_id: "58c039018060197ca0b52d4c",
email: "user1#example.com",
password: "foo",
balance_cents: 100
},
{
_id: "58c03ada8060197ca0b52d52",
email: "user2#example.com",
password: "foo",
balance_cents: 50000
}
]
const accounts = [
{
name: "Postbank",
iban: "1232423423",
swift: "2444444"
},
{
name: "DKB",
iban: "1234923423",
swift: "6667898"
},
{
name: "Fidor",
iban: "909873423",
swift: "998733"
}
]
async function dropDatabase () {
console.log('Removing User collection')
await User.remove()
console.log('Success!')
}
async function seedUsers () {
console.log('Seeding users..')
try {
await User.insertMany(users)
console.log('Success!')
} catch(error) {
console.log('Error:' + e)
}
}
dropDatabase()
seedUsers()
process.exit(0)
But it doesn't seem to get past the await statements in each function. The output is:
Removing User collection
Seeding users..
And there are no objects in the database. I am using the exact same syntax as I found in a tutorial and can't understand why this is not working.
Any idea anyone? I guess it is a very stupid error that I just don't see right now. Thanks!

Answer 1

Your code isn't waiting for dropDatabase() and seedUsers() to complete before calling process.exit(0).
You need to wrap both of those calls in another async method that can wait for their completion.
async function doBoth() {
await dropDatabase();
await seedUsers();
process.exit(0);
}
doBoth();
However, you probably shouldn't need to call process.exit(0), but that's a separate issue.