CODEWITHSUNDEEP
javascriptgoogle-cloud-firestoregoogle-cloud-functions
JohnSan
JohnSan

Reputation: 53

Query.data is not a function - Cloud funtions

I have the following code below, following the example of this link: https://gist.github.com/CodingDoug/814a75ff55d5a3f951f8a7df3979636a .Only that is returning error.

const functions = require('firebase-functions');
const admin = require('firebase-admin');

admin.initializeApp(functions.config().firebase);
const db = admin.firestore();

exports.alertHelp = functions.firestore
    .document('chamados/{userId}')
    .onWrite(async (change, context) => {
        try {
            const snapshot = change.after;
            const val = snapshot.data();
            const tid = val.tid;
    
            const collection = db.collection('permissons');
            const query = await collection.where('tid', '==', tid).get();
            const token = query.data().fcmToken;

            const promises = [];
            token.forEach(fcm => {
                const p = admin.firestore().doc(`{userId}/${fcm}`).get();
                promises.push(p);
            });

            const snapshots = await Promise.all(promises);

            const results = [];
            snapshots.forEach(snap => {
                const data = snap.data().fcmToken;              
                results.push(data);
            })

            console.log(results);
            
        } catch (error) {
            console.error(error)
            
        }
     
});

Error

query.data is not a function

Upvotes: 0

Views: 211

Answers (1)

Doug Stevenson
Doug Stevenson

Reputation: 317467

In this line:

const query = await collection.where('tid', '==', tid).get();

query is going to be a QuerySnapshot type object. As you can see from the linked API documentation, it doesn't have a data() method. That's what the error is trying to tell you.

A QuerySnapshot can contain zero or more DocumentSnapshot objects. You have to write code to check for and iterate those results. You can use the forEach method, or the docs property on the QuerySnapshot to do this. You might want to review the documentation about that.

Upvotes: 1

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