We Keep Coding

I trying to make a discord bot using javascript..but it giving me error

enter image description here
it giving me this error:
const client = new Client({ intents: [Intents.FLAGS.GUILDS, Intents.FLAGS.GUILD_MESSAGES] });
^
TypeError: Cannot read properties of undefined (reading 'FLAGS')
I expect it to run my bot on my discord channel

It says that the object Intents are undefined and doesn't have property FLAGS. Please double-check your object, print it with console.log see if it actually there.

TypeError: Cannot read properties of undefined (reading 'send')

I am writing a discord bot with node.js. I want the bot to send a message automatically when a member joins or leaves the channel. But I keep getting an error about the send function. Can you help me?
[1]: https://i.stack.imgur.com/4URud.png
module.exports = (client) => {
client.on('guildMemberRemove', (member) => {
console.log(member);
member.guild.channels.cache.get("1234567890912345678").send("byeee");
});
}

member.guild.channels.cache.get("1234567890912345678") is undefined, so there is no send() function. You need to identify why that channel is undefined or doesn't exist or find that channel using another method.

TypeError: Cannot read property '0' of undefined in post method in nodejs

I am new to nodejs and mongodb.
I am trying to create simple to-do app with nodejs and mongodb.
I have added the task in database.
Now in post method, I am using insertOne method of mongodb and in res.json I am having the following error.
res.json(info.ops[0].data)
TypeError: Cannot read property '0' of undefined
Code :
app.post('/create-item', function(req, res){
db.collection('items').insertOne({ text:req.body.text }, function(err, info){
res.json(info.ops[0])
})
})
Below is the screenshot of Error.

In current versions, there is no property returned named ops when insertOne is successful.
Hence the error TypeError: Cannot read property '0' of undefined
insertOne returns two properties:
acknowledged
Indicates whether this write result was acknowledged. If not, then all other members of this result will be undefined
insertedId
The identifier that was inserted. If the server generated the identifier, this value will be null as the driver does not have access to that data
See:
InsertOne
InsertOneResult
app.post('/create-item', function(req, res){
db.collection('items').insertOne({ text:req.body.text }, function(err, info){
console.log(info.acknowledged)
console.log(info.acknowledged)
res.json(info.acknowledged)
})
})
In previous versions, for example 3.2, different properties were returned for insertOne:
insertOne #3.2
insertOneWriteOpCallback #3.2
Similarly, different properties were returned for updateOne:
updateOne #3.2
updateOneWriteOpCallback #3.2
For more information about migrating to version 4 from earlier versions, see the article:
Changes in 4.x (and how to migrate!)

I encountered the same problem with the to-do app tutorial today. For those interested try changing the line - res.json(info.ops[0])
to - res.json({ _id: info.insertedId.toString(), text: req.body.text })
This gets the inserted id from the database for the newly added item. As "info" doesn't seem to return the inserted text in the current version of mongodb - i added that from the request parameter.
I got my information from here - Get the _id of inserted document in Mongo database in NodeJS

you are doing it wrong way firstly check the err then send the res.json because the error is because your info might be null if data not inserted successfully so you need to do it like
app.post('/create-item', function(req, res){
db.collection('items').insertOne({ text:req.body.text }, function(err, info){
if (err) {
res.json({message: "not inserted successFully"});
return;
}
res.json(info.ops[0])
})
})
now in above code what will happen if data is not inserted successfully it will send the error as response and return from function.

How to send this request to websockets using the `ws` library

I am working with a private API, trying to send the following request with websockets using the ws library. I can get this request to work using the Simple WebSocket Client extension in Google Chrome, but everything I've tried with ws is not working. The websockets connection is established. I know this because I'm getting a generic heartbeat message and I'm able to get events for other purposes. But this simple piece has me stumped, mostly because the private API's documentation for websockets usage sparse, to say the least, if not completely non-existent.
Request: {"message":"ping"}
My code:
const ws = new WebSocket(channelData.connectUri)
ws.onerror = error => {
console.log('Connection Error', error)
}
ws.onopen = () => {
console.log("Connected")
ws.emit("message", {"message":"ping"}) // this sends me my own message
// it should send me this:
// {"topicName": "channel.metadata", "eventBody": {"message": "pong"}}
// ws.emit("message", "ping") // attempted this also, without success
}
ws.on("message", msg => console.log(msg))
I have tried using ws.send({"message":"ping"}) but I get this error:
node:buffer:323
throw new ERR_INVALID_ARG_TYPE(
^
TypeError [ERR_INVALID_ARG_TYPE]: The first argument must be of type string or an instance of Buffer, ArrayBuffer, or Array or an Array-like Object. Received an instance of Object
at new NodeError (node:internal/errors:329:5)
at Function.from (node:buffer:323:9)
at toBuffer (/Users/user/Documents/GitHub/lib/node_modules/ws/lib/buffer-util.js:97:18)
at Sender.send (/Users/user/Documents/GitHub/lib/node_modules/ws/lib/sender.js:261:17)
at WebSocket.send (/Users/user/Documents/GitHub/lib/node_modules/ws/lib/websocket.js:361:18)
at WebSocket.ws.onopen (/Users/user/Documents/GitHub/lib/server.js:55:20)
at WebSocket.onOpen (/Users/user/Documents/GitHub/lib/node_modules/ws/lib/event-target.js:144:16)
at WebSocket.emit (node:events:378:20)
at WebSocket.setSocket (/Users/user/Documents/GitHub/lib/node_modules/ws/lib/websocket.js:177:10)
at ClientRequest.<anonymous> (/Users/user/Documents/GitHub/lib/node_modules/ws/lib/websocket.js:671:15) {
code: 'ERR_INVALID_ARG_TYPE'
}
This ws.send("message", "ping") does nothing.

You can only send String or Buffer data with WebSocket.prototype.send. Fortunately, JSON.parse + JSON.stringify quickly bridge the gap between structured data (Object, Array, etc.) and String.
Try:
ws.send(JSON.stringify({"message":"ping"}));
The receiving end will get a String, not an Object - in order to recreate the structured data, you can then perform:
let structuredData = JSON.parse(stringReceivedFromWebSocket);

Pubnub Socket.io - disconnect from a channel

Using Pubnub's Socket.io implementation, how does one disconnect from a channel (or at all)?
I set up my connection like this:
socket = io.connect "http://pubsub.pubnub.com",
channel: "some-channel"
publish_key: "..."
subscribe_key: "..."
But when I try to disconnect like this (the way you do when using normal Socket.io):
socket.disconnect()
I get error messages like this:
Uncaught TypeError: Cannot read property 'channel' of undefined

This is a bug in Pubnub's Socket.io implementation. See the issue on Github. It has been fixed in version 3.4.

I think correct syntax is :
socket.on( 'disconnect', function() {
console.log('my connection dropped');
} );
https://github.com/pubnub/pubnub-api/tree/master/socket.io