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firebase Functions TimeStamp convert it to string

const signupTime =admin.database.ServerValue.TIMESTAMP
database.ref(`/admin/vendorOrder/${vendor}/${userID}`).set(signupTime);
console.log(signupTime);
i want the time value
while in database it returns correctly
in consol log it returns
how do i make it return value in string
also
database.ref(`/admin/vendorOrder/${vendor}/${userID}/${signupTime}/order`).set(order);
returns error
kindly help

As explained in the doc, with ServerValue.TIMESTAMP you get "a placeholder value for auto-populating the current timestamp as determined by the Firebase servers".
In other words signupTime does not contain the value of the timestamp, since this one is set on the server (the back-end) when you write to the database.
If you want to get this value in your Cloud Function (or in a front-end), you need to query the newly set database node, as follows, for example:
const signupTime = admin.database.ServerValue.TIMESTAMP
const database = admin.database();
const ref = database.ref(`/admin/vendorOrder/${vendor}/${userID}`);
ref
.set(signupTime)
.then(() => {
return ref.get();
})
.then((snap) => {
console.log(snap.val());
})
.catch((error) => {
console.log(error);
});

Deep copy of the Object to add a key : value

I am pre-fetching a product from a database using mongoose with next.js and react-query. I was wondering why I need to do a deep copy of a nested object in order to add a key:value to it. Otherwise it does not work. Let me know what I am not understanding.
await queryClient.prefetchQuery(['productSlug', slug], async () => {
const product = await read(slug);
const existingRatingObject = product.ratings.find(
(item) => item.postedBy.toString() === user._id.toString()
);
const copyProduct = JSON.parse(JSON.stringify(product));
if (existingRatingObject) {
copyProduct.star = existingRatingObject.star;
} else {
copyProduct.star = 0;
}
console.log({ copyProduct });
return JSON.stringify(copyProduct);
});

The reason is that the product fetched is a Mongoose document not a plain old JavaScript object.
When you convert it to plain old javascript Object, you will be able to add any key to it.
You can add .lean() to you query or add toObject/toJSON to you the fetched document

Firebase Firestore - Async/Await Not Waiting To Get Data Before Moving On?

I'm new to the "async/await" aspect of JS and I'm trying to learn how it works.
The error I'm getting is Line 10 of the following code. I have created a firestore database and am trying to listen for and get a certain document from the Collection 'rooms'. I am trying to get the data from the doc 'joiner' and use that data to update the innerHTML of other elements.
// References and Variables
const db = firebase.firestore();
const roomRef = await db.collection('rooms');
const remoteNameDOM = document.getElementById('remoteName');
const chatNameDOM = document.getElementById('title');
let remoteUser;
// Snapshot Listener
roomRef.onSnapshot(snapshot => {
snapshot.docChanges().forEach(async change => {
if (roomId != null){
if (role == "creator"){
const usersInfo = await roomRef.doc(roomId).collection('userInfo');
usersInfo.doc('joiner').get().then(async (doc) => {
remoteUser = await doc.data().joinerName;
remoteNameDOM.innerHTML = `${remoteUser} (Other)`;
chatNameDOM.innerHTML = `Chatting with ${remoteUser}`;
})
}
}
})
})
})
However, I am getting the error:
Uncaught (in promise) TypeError: Cannot read property 'joinerName' of undefined
Similarly if I change the lines 10-12 to:
remoteUser = await doc.data();
remoteNameDOM.innerHTML = `${remoteUser.joinerName} (Other)`;
chatNameDOM.innerHTML = `Chatting with ${remoteUser.joinerName}`;
I get the same error.
My current understanding is that await will wait for the line/function to finish before moving forward, and so remoteUser shouldn't be null before trying to call it. I will mention that sometimes the code works fine, and the DOM elements are updated and there are no console errors.
My questions: Am I thinking about async/await calls incorrectly? Is this not how I should be getting documents from Firestore? And most importantly, why does it seem to work only sometimes?
Edit: Here are screenshots of the Firestore database as requested by #Dharmaraj. I appreciate the advice.

You are mixing the use of async/await and then(), which is not recommended. I propose below a solution based on Promise.all() which helps understanding the different arrays that are involved in the code. You can adapt it with async/await and a for-of loop as #Dharmaraj proposed.
roomRef.onSnapshot((snapshot) => {
// snapshot.docChanges() Returns an array of the documents changes since the last snapshot.
// you may check the type of the change. I guess you maybe don’t want to treat deletions
const promises = [];
snapshot.docChanges().forEach(docChange => {
// No need to use a roomId, you get the doc via docChange.doc
// see https://firebase.google.com/docs/reference/js/firebase.firestore.DocumentChange
if (role == "creator") { // It is not clear from where you get the value of role...
const joinerRef = docChange.doc.collection('userInfo').doc('joiner');
promises.push(joinerRef.get());
}
});
Promise.all(promises)
.then(docSnapshotArray => {
// docSnapshotArray is an Array of all the docSnapshots
// corresponding to all the joiner docs corresponding to all
// the rooms that changed when the listener was triggered
docSnapshotArray.forEach(docSnapshot => {
remoteUser = docSnapshot.data().joinerName;
remoteNameDOM.innerHTML = `${remoteUser} (Other)`;
chatNameDOM.innerHTML = `Chatting with ${remoteUser}`;
})
});
});
However, what is not clear to me is how you differentiate the different elements of the "first" snapshot (i.e. roomRef.onSnapshot((snapshot) => {...}))). If several rooms change, the snapshot.docChanges() Array will contain several changes and, at the end, you will overwrite the remoteNameDOM and chatNameDOM elements in the last loop.
Or you know upfront that this "first" snapshot will ALWAYS contain a single doc (because of the architecture of your app) and then you could simplify the code by just treating the first and unique element as follows:
roomRef.onSnapshot((snapshot) => {
const roomDoc = snapshot.docChanges()[0];
// ...
});

There are few mistakes in this:
db.collection() does not return a promise and hence await is not necessary there
forEach ignores promises so you can't actually use await inside of forEach. for-of is preferred in that case.
Please try the following code:
const db = firebase.firestore();
const roomRef = db.collection('rooms');
const remoteNameDOM = document.getElementById('remoteName');
const chatNameDOM = document.getElementById('title');
let remoteUser;
// Snapshot Listener
roomRef.onSnapshot(async (snapshot) => {
for (const change of snapshot.docChanges()) {
if (roomId != null){
if (role == "creator"){
const usersInfo = roomRef.doc(roomId).collection('userInfo').doc("joiner");
usersInfo.doc('joiner').get().then(async (doc) => {
remoteUser = doc.data().joinerName;
remoteNameDOM.innerHTML = `${remoteUser} (Other)`;
chatNameDOM.innerHTML = `Chatting with ${remoteUser}`;
})
}
}
}
})

Creating objects in Model.js, NodeJs

In my model.js (using mongoose) , I am initially creating 40 objects in model.js which are to be used in the entire program. No other function in any file creates more objects but only updates the existing ones.
My model.js
var TicketSchema = mongoose.model('Tickets', TicketSchema);
for(let i = 1;i<=40;i++)
{
var new_ticket = new TicketSchema({ticket_number:i});
new_ticket.save(function(err, ticket) {
});
}
Problem is I noticed there were much more objects than 40 after some time. I wanted to know if model.js runs more than once during execution or is it just due to repeated calling of npm run start and then closing the server?
Also is there way better way of creating objects initially which are to be used for the entire program?

It will create new 40 documents every time you start the server. You can use this function to avoid creating if the records already exist by checking count.
const TicketModel = mongoose.model('Tickets', TicketSchema);
const insertTicketNumber = async () => {
try {
const count = await TicketModel.countDocuments({});
if (count) return;
await TicketModel.create(
[...Array(40).keys()]
.map(i => i + 1)
.map(number => ({ ticket_number: number }))
);
} catch (error) {
console.log(error.message);
}
};

cloud functions for firebase onwrite not triggering any executions

exports.editData = functions.database.ref('/AllData/hello/A').onWrite((change, context) => {
const after = change.after;
if (after.exists()) {
const data = after.val();
var value = data;
// set of data to multiply by turns ratio
var actualEIn = (value.ein)*200;
console.log('Data Edited');
}
return admin.database().ref('/editedData/hello/A').push({
ein: actualEIn,
});
});
Edit: made some edits to the code as suggested! However, when I deploy it there are literally no logs.

Change this:
exports.editValues = functions.database.ref('/AllData/hello/A').onWrite((snapshot) => {
const data = snapshot.val();
if (data.exists()) {
into this:
exports.editValues = functions.database.ref('/AllData/hello/A').onWrite((change,context) => {
const data = change.after.val();
if (data.exists()) {
more info here:
https://firebase.google.com/docs/functions/beta-v1-diff#realtime-database

exports.editData = functions.database.ref('/AllData/hello/A/{id}').onWrite((change, context) => {
const afterData = change.after;
if (afterData.exists()) {
console.log('hey');
const data = afterData.val();
// set of data to multiply by turns ratio
var actualEIn = (data.ein)*200;
}
return admin.database().ref('/editedData/hello/A').push({
ein: actualEIn,
});
});
Hi guys thank you for all your help! :) I managed to solve this by adding a /{id} at the back!

You've got two things wrong here.
First, newer versions of the firebase-functions SDK since version 1.0 deliver a Change object to onWrite handlers instead of a snapshot, as it appears you are expecting. The Change object has properties for before and after with DataSnapshot objects of the contents of the database before and after the change that triggered the function. Please read the documentation for database triggers to get all the information.
Second, exists() is a method on DataSnapshot, but you're using it on the raw JavaScript object value of the contents of the database the location of change. JavaScript objects coming from val() will not have any methods to call.
You should probably update your code to:
Use the latest version of the firebase-functions module
Alter your function to accept the Change object instead of a snapshot
Use the exists() method on a snapshot in the change, rather than a raw JavaScript object.
Starter code:
exports.editValues = functions.database.ref('/AllData/hello/A').onWrite((change) => {
const after = change.after; // the DataSnapshot of the data after it was changed
if (after.exists()) {
const data = after.val() // the raw JavaScript value of the location
// use data here
}
})