javascript - Add field separately to firestore document - Stack Overflow

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The following code creates a firestore collection and adds data to it:

function saveID(sender_psid,complete){
   let data = new Object();
   data.ID = sender_psid;
   data.TASK = complete;
   data.TIME = new Date();
   db.collection('users').add(data);
}

I want to create another function which adds a field to the document at a different time. I have the following function but am getting the error "TypeError: collectionRef.update is not a function"

function saveImage(sender_psid,image) {


  let collectionRef = db.collection('users');


  collectionRef.update({IMG:image}).then(res => {
  console.log(`Document updated at ${res.updateTime}`);
});
}

The following code creates a firestore collection and adds data to it:

function saveID(sender_psid,complete){
   let data = new Object();
   data.ID = sender_psid;
   data.TASK = complete;
   data.TIME = new Date();
   db.collection('users').add(data);
}

I want to create another function which adds a field to the document at a different time. I have the following function but am getting the error "TypeError: collectionRef.update is not a function"

function saveImage(sender_psid,image) {


  let collectionRef = db.collection('users');


  collectionRef.update({IMG:image}).then(res => {
  console.log(`Document updated at ${res.updateTime}`);
});
}

• javascript
• node.js
• firebase
• google-cloud-firestore

Share Improve this question Follow edited Jan 16, 2019 at 13:47 Cœur 38.7k2626 gold badges202202 silver badges277277 bronze badges asked Jul 13, 2018 at 21:34 RashikRashik 1,14422 gold badges1616 silver badges3636 bronze badges

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3 Answers 3

Sorted by: Reset to default 15

Build a DocumentReference to the document you want to update, then use the update() method on the DocumentReference to indicate only the fields to be added or changed. Pass it an object with only properties that match the fields to add or change.

According to this documentation, There is a better way

const cityRef = db.collection('cities').doc('BJ');

const res = await cityRef.set({
  capital: true
}, { merge: true });

Flutter Example:

var userDoc = Firestore.instance.collection('users').document('replaceIdHere');
userDoc.updateData({'fieldName':'newValue'});

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