Kevin Powell - Community•4mo ago

How to fix this error: app crashed - waiting for file changes before starting?

As a beginner, I followed a webdevsimplified course. I can not fix this error -> [nodemon] app crashed - waiting for file changes before starting... I attach also a photo if it helps.

40 Replies

Jochem•4mo ago

src as a variable is undefined usually that means you tried to use querySelector and it failed to find the element you're looking for though I suppose in this case with node, it's something different. Impossible to tell without more info though

INDavid04OP•4mo ago

yeah it makes sense, but node_modules is installed with npm i express ejs express-ejs-layouts and I did't modified those files at all

Jochem•4mo ago

you might be missing a .env file in your project root then? Otherwise, no idea

INDavid04OP•4mo ago

.env is in the project root with this line DATABASE_URL=mongodb://localhost/mybrary should i change what is after localhost/? also in the video tutorial he used .load(), specifying after to use .parse() instead

INDavid04OP•4mo ago

here is where he used the function

INDavid04OP•4mo ago

I saw in comments to use .config() instead, but got another error

glutonium•4mo ago

where is src coming from? like where is it defined

INDavid04OP•4mo ago

1 sec

INDavid04OP•4mo ago

however, after repacing parse() with config(), i got this Error: Cannot find module 'mangoose'

glutonium•4mo ago

dud u install mongoose? run npm i mongoose if not what does the variabe src represent?

INDavid04OP•4mo ago

I don't know, but I do not use the parse() function anymore

glutonium•4mo ago

can u show the code where u r requiring mongoose u dont know? wdym u dont know the function u r trying to run even takes as arguments

INDavid04OP•4mo ago

I said I am new to this stuff

if (process.env.NODE_ENV !== 'production') {
    require('dotenv').config()
}

const express = require('express')
const app = express()
const expressLayouts = require('express-ejs-layouts')

const indexRouter = require('./routes/index')

app.set('view engine', 'ejs')
app.set('views', __dirname + '/views')
app.set('layout', 'layouts/layout')
app.use(expressLayouts)
app.use(express.static('public'))

/// Right here
const mangoose = require('mangoose')
mangoose.connect(process.env.DATABASE_URL, {useNewUrlParser: true })
const db = mangoose.connection
db.on('error', error => console.error(error))
db.once('open', () => console.log('Connected to Mongoose'))

app.use('/', indexRouter)

app.listen(process.env.PORT || 3000)

if (process.env.NODE_ENV !== 'production') {
    require('dotenv').config()
}

const express = require('express')
const app = express()
const expressLayouts = require('express-ejs-layouts')

const indexRouter = require('./routes/index')

app.set('view engine', 'ejs')
app.set('views', __dirname + '/views')
app.set('layout', 'layouts/layout')
app.use(expressLayouts)
app.use(express.static('public'))

/// Right here
const mangoose = require('mangoose')
mangoose.connect(process.env.DATABASE_URL, {useNewUrlParser: true })
const db = mangoose.connection
db.on('error', error => console.error(error))
db.once('open', () => console.log('Connected to Mongoose'))

app.use('/', indexRouter)

app.listen(process.env.PORT || 3000)

ἔρως•4mo ago

cannot find module mangoose you installed mongoose

INDavid04OP•4mo ago

no way

ἔρως•4mo ago

way

INDavid04OP•4mo ago

glutonium•4mo ago

i get that but u wont be able to debug if u dont know what your code does u should understand what the function expects

ἔρως•4mo ago

this is correct

glutonium•4mo ago

if u blindly follow someones footstep u will lose yourself pretty easily

ἔρως•4mo ago

lose not loose

INDavid04OP•4mo ago

so true

glutonium•4mo ago

;-;

ἔρως•4mo ago

loose is the oposite of tight, lose is the oposite of find

glutonium•4mo ago

i mix them up all the time 😭

INDavid04OP•4mo ago

i tried to understand but is very different from what i did in highscool with c++

ἔρως•4mo ago

it is, but it isnt as hard as you think its always overwhelming at first

INDavid04OP•4mo ago

sure

ἔρως•4mo ago

it gets a lot easier

INDavid04OP•4mo ago

hmm should i show you that?

INDavid04OP•4mo ago

ἔρως•4mo ago

its mongoose not mangoose

INDavid04OP•4mo ago

lol

ἔρως•4mo ago

mongoose for mongodb, right?

INDavid04OP•4mo ago

oh yeah in my native language 'o' is heard like 'a'

ἔρως•4mo ago

mangoose sounds like a shitty superhero with awful super powers languages are fun

INDavid04OP•4mo ago

thanks a lot guys, now it is works

ἔρως•4mo ago

you're welcome

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How to fix this error: app crashed - waiting for file changes before starting?