'How can I get specific document data from firestore querysnapshot?

I got a querysnapshot in a function. And want to bring the whole querysnapshot to another function (functionTwo). In functionTwo, I want to get a specific document in the querysnapshot WITHOUT forEach. The specific doc can be changed by different cases.

ref_serial_setting.get()
    .then(querysnapshot => {
      return functionTwo(querysnapshot)
    })
    .catch(err => {
      console.log('Error getting documents', err)
    })


let functionTwo = (querysnapshot) => {
  // getting value

  const dataKey_1 = "dataKey_1"

  // Tried 1
  const value = querysnapshot.doc(dataKey_1).data()

  // Tried 2
  const value = querysnapshot.document(dataKey_1).data()

  // Tried 3 (Put 'data_name': dataKey_1 in that doc)
  const value = querysnapshot.where('data_name', '==', dataKey_1).data()
}

The result are all these trying are not a function.

How can I get specific document data from querysnapshot??

Is there any easy method to change the querysnapshot to JSON?

Solution 1:^[1]

Theres an easy way to do this, each QuerySnapshot has a property docs which returns an array of QueryDocumentSnapshots. See QuerySnapshot documentation.

let citiesRef = db.collection('cities');
let query = citiesRef.where('capital', '==', true).get().then(snapshot => {
  snapshot.docs[0]; // => returns first document
});

Solution 2:^[2]

let citiesRef = db.collection('cities');
let query = citiesRef.where('capital', '==', true).get()
  .then(snapshot => {
    if (snapshot.empty) {
      console.log('No matching documents.');
      return;
    }  

    snapshot.forEach(doc => {
      console.log(doc.id, '=>', doc.data());
    });
  })
  .catch(err => {
    console.log('Error getting documents', err);
  });

from https://firebase.google.com/docs/firestore/query-data/get-data

Solution 3:^[3]

you can use this code :

const querySnapshot = await getDocs(collection(db, "collectionNaame"));
const docSnapshots = querySnapshot.docs;
for (var i in docSnapshots) {
console.log(i)
const doc = docSnapshots[i].data();
console.log(doc)

Solution 4:^[4]

Just do

db.doc(<<ref>>).get()

this returns a promise

[here ]: https://firebase.google.com/docs/firestore/query-data/get-data#get_a_document is the link to the docs

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	dcts
Solution 2	Muhammed Moussa
Solution 3	Coden Arfat
Solution 4	Rudrava Mukherjee

'How can I get specific document data from firestore querysnapshot?

Solution 1:[1]

Solution 2:[2]

Solution 3:[3]