Add field separately to firestore document
17,085
Solution 1
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.
Solution 2
Flutter Example:
var userDoc = Firestore.instance.collection('users').document('replaceIdHere');
userDoc.updateData({'fieldName':'newValue'});
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Comments
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Rashik over 1 year
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}`); }); }
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Rashik almost 6 yearsDo I build the reference in the second function?
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Doug Stevenson almost 6 yearsBuild it wherever you need to use it. If you don't need a DocumentReference, then don't bother.
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Doug Stevenson almost 6 yearsYou built a reference to a collection, not a document within that collection.