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(). (rejection id: 4)
const uuid = require('uuid/v4')
const fs = require("fs")
const path = require("path")
class Course {
constructor(title,price,img) {
this.title = title
this.price = price
this.img = img
this.id = uuid()
}
toJSON() {
return {
title:this.title,
price:this.price,
img:this.img,
id:this.id
}
}
async save() {
const courses = await Course.getAll()
courses.push(this.toJSON)
return new Promise(( resolve, reject) => {
fs.writeFile(
path.join(__dirname, '..', 'data', 'courses.json'),
JSON.stringify(courses),
(err) => {
if (err) {
reject(err)
} else {
resolve()
}
}
)
})
}
static getAll() {
return new PromiseRejectionEvent((resolve, reject) => {
fs.readFile(
path.join(__dirname, "..", "data", "courses.json"),
'utf-8',
(err, content) => {
if (err) {
reject (err)
} else {
resolve(JSON.parse(content))
}
}
)
})
}
}
module.exports = Course
