CODEWITHSUNDEEP
javascriptnode.jsfirebasegoogle-cloud-firestore
Mic
Mic

Reputation: 333

NodeJS, Firestore get field

enter image description here

I have firestore set up on my nodejs chatbot. And its successfully copying the Facebook users ID to .doc Name, and setting there username and other info under there user ID in firestore

How do i go about retrieving this "field" name to display back to user.

what i have so far is this

 const givename = db.collection('users').doc(''+ sender_id).get("name");

How ever firebase is returning nothing.

Iv looked alot online on how to return a field. but with little luck. Any suggestions?

Upvotes: 6

Views: 13496

Answers (3)

Saadi
Saadi

Reputation: 131

Another way is:

const givename = await db.collection("users").doc("YOUR DOCUMENT NAME").get();

console.log(givename.data().name);

Remember to put this code in an async function since we are using await here

Upvotes: 0

Frank van Puffelen
Frank van Puffelen

Reputation: 598718

Calling get() doesn't return the data immediately, since the data is loaded asynchronously. It instead returns a promise, which resolves once the data is loaded. This means that you can use await (as in Francisco's answer) or (if await is not available) implement the then() method:

db.collection('users').doc(''+ sender_id).get().then(function(doc) {
  console.log(doc.data().name);
});

A common pitfall to be aware of: the doc.data() is only available inside the callback,

Upvotes: 15

Cisco
Cisco

Reputation: 22952

Haven't worked with Firestore yet, but from reading https://firebase.google.com/docs/firestore/query-data/get-data

something like below should work (untested):

const userRef = db.collection("users").doc("1234")
const userDoc = await userRef.get()
const {name} = userDoc.data()
console.log(name)

Upvotes: 4

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