I'm trying to pass something down from app to controller and then model and then pass it back up, I'm moving down the chain fine into models and getting what I want to send back up, but then my controller is returning undefined. I'm aware I'm not returning the promise properly but can't quite see why I'm not returning.
Controller.js
const { fetchOwnerById } = require('./models')
const handleGreeting = (request, response) => {
response.status(200).send({ message : 'hello from my api'})
}
const getOwnerById = (request, response) => {
const ownerId = request.params['id'];
fetchOwnerById(ownerId)
.then((owner) => {
console.log(owner)
response.status(200).send({owner : owner})
})
}
module.exports = { handleGreeting, getOwnerById }
models.js
const fs = require('fs/promises')
const fetchOwnerById = (ownerId) => {
console.log(ownerId)
fs.readFile(__dirname + `/data/owners/${ownerId}.json`, 'utf-8').then((data) => {
console.log(data)
return data
// response.status(200).send(data)
})
}
module.exports = { fetchOwnerById }
I'm receiving TypeError: Cannot read properties of undefined (reading 'then')
The fetchOwnerById method doesn't return anything, so it returns undefined, you need to return a promise of data so you can call then.
const fs = require('fs/promises')
const fetchOwnerById = async (ownerId) => {
console.log(ownerId)
return await fs.readFile(__dirname + `/data/owners/${ownerId}.json`, 'utf-8')
}
module.exports = { fetchOwnerById }