Getting document ID in Firebase Cloud Functions (Firestore)

Is there a way in Firebase Cloud Function to query for a document ID with Field and data? In Android I would do something like this:

FirebaseFirestore fs = FirebaseFirestore.getInstances(); static final String mInterfaceId = "57ZNmAIldUPAc6ZWggvF"; fs.collection("users").whereEqualTo("interface_id", mInterfaceId).get().addOnCompleteListener(new OnCompleteListener() < @Override public void onComplete(@NonNull Tasktask) < for(DocumentSnapshot doc : task.getResult()) userId[0] = doc.getId(); if(userId.length==0) Log.e("Error: ID Not found"); else if(userId.length>1) Log.e("Error: More than one ID found"); else // Continue Process with Found ID > >);

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Thanks in advance!

82.6k 10 10 gold badges 97 97 silver badges 126 126 bronze badges asked Mar 31, 2018 at 10:38 1,739 2 2 gold badges 13 13 silver badges 11 11 bronze badges

1 Answer 1

var usersRef = db.collection('users'); var queryRef = usersRef.where('interface_id', '==', mInterfaceId).get() .then(snapshot => < snapshot.forEach(doc =>< . >); >) .catch(err => < . >);

Basically in Cloud Functions you write code for node.js: have a look at the documentation https://firebase.google.com/docs/firestore/query-data/queries and choose node.js in the code snippets.

answered Mar 31, 2018 at 15:25 Renaud Tarnec Renaud Tarnec 82.6k 10 10 gold badges 97 97 silver badges 126 126 bronze badges

Thanks Renaud. Was looking for the documentation for Firebase Cloud Functions, didn't realize that there's a node.js tab on the documentation.

Commented Apr 1, 2018 at 10:22

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