hi firebase functions I want to change multiple children, but cannot change all children under user id. can you help me with this topic
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);
var database = admin.database();
exports.newNodeDetected = functions.database.ref('system/{userId}/value')
.onWrite((Change) =>{
var oldDeger = Change.before.val();
var newDeger = Change.after.val();
if (newDeger === '0'){
database.ref(`system/${userId}/value`).set('1');
}
})
enter image description here
You can update multiple children in several ways using standard object manipulation and direct writes as demonstrated in your question.
You may be interested in using update rather than set when updating multiple fields.
You will also notice I added a Context field which allows you to access information such as the userID from the reference path and other information: Source
exports.newNodeDetected = functions.database.ref('system/{userId}/value')
.onWrite((Change, Context) =>{
var oldDeger = Change.before.val();
var newDeger = Change.after.val();
if (newDeger === '0'){
database.ref(`system/${Context.params.userId}/value`).set('1');
database.ref(`system/${Context.params.userId}/otherField`).update({another:field});
}
})
Resource: Medium Article: Realtime Set Vs Update
Related
As per suggestion on Firebase documentation on Firestore bundles, I haven't found the best way to create bundle based on the example given above. I don't know what I have to include in docSnapshot. I know what I have to fill in collection. But what is the case if CollectionGroup? There is no detail explanation about it, either. Can someone from Firebase team explain what I have to include in docSnapshot? I have collection "Music_Epic", for example?
const bundleId = "latest-Epic";
const bundle = firestore.bundle(bundleId);
const docSnapshot = await firestore.doc("Music_Epic/").get(); //What should be here?
const querySnapshot = await firestore.collection("Music_Epic").get();
// Build the bundle
// Note how querySnapshot is named "latest-stories-query"
const bundleBuffer = bundle.add(docSnapshot); // Add a document
bundleBuffer.add("latest-Epic-query", querySnapshot); // Add a named query.
bundleBuffer.build();
The add() takes either a DocumentSnapshot or (queryName, QuerySnapshot) as parameters. Collection Groups queries also return a QuerySnapshot so you can follow the same method used for querying a single collection.
const bundle = firestore.bundle();
const querySnapshot = await firestore.collection("Music_Epic").get();
// For collectionGroup queries:
// const querySnapshot = await firestore.collectionGroup("col_name").get();
const bundleBuffer = bundle.add('latest_music_epic_query', querySnapshot);
bundleBuffer.build();
below is the function, i have used from youtube .
const functions = require("firebase-functions");
const admin = require("firebase-admin");
admin.initializeApp();
exports.androidPushNotification =
functions.firestore.document('MyMoneyNotifications/{MyPercentageMoney}').onCreate(
(snapshot, context)=>
{
admin.messaging().sendToTopic(
"new_user_forums",
{
notification:{
title:snapshot.data().title,
body: snapshot.data().body
}
});});
it is working fine.
but i want to check for below structure.
Notifications(collection)
->UserId(document)
->MyNotification(collection)
->notify1
->notify2
now, i want to check for a specific user if he had any new notifications. how to check for the collection "MyNotification" in firebase functions
If you are trying to listen to sub-collections then you can set the path to:
exports.androidPushNotification =
functions.firestore.document('Notifications/{userId}/MyNotification/{notificationId}')
You can read more about this in the documentation
I created a Db. Name Tomris
Below that is a 'Cumle': "Sentence". Whatever I do here does not happen.
https://i.stack.imgur.com/EEKAk.png
What I want is Trigger work when the sentence changes. But I couldn't.
const functions = require('firebase-functions');
const admin = require('firebase-admin');
exports.DBTrigger = functions.database.ref('tomris-d96a7/Cumle')
.onWrite( (change, context) => {
const afterData = change.after.data();
console.log(afterData);
console.log ("onur");
});
You included the name of your database in the Cloud Functions trigger, which is not needed and in fact means your Function is now looking at a non-existing path.
To trigger on the correct path, only include that path in the Function definition:
exports.DBTrigger = functions.database.ref('Cumle')
...
I'm extremely new to using Firebase cloud functions, and I am struggling to find the error in my code. It is supposed to trigger on a firestore write and then copy that document into all of the user's feeds who follow that user who posted.
My current code is below:
exports.fanOutPosts = functions.firestore
.document('posts/{postId}')
.onCreate((snap, context) => {
var db = admin.firestore();
const post = snap.data();
const userID = post['author'];
const postCollectionRef = db.collection('friends').document(userID).collection('followers');
return postCollectionRef.get()
.then(querySnapshot => {
if (querySnapshot.empty) {
return null;
} else {
const promises = []
querySnapshot.forEach(doc => {
promises.push(db.collection('feeds').document(doc.key).collection('posts').document(post.key).update(data));
});
return Promise.all(promises);
}
});
});
So this successfully deploys to Firebase, but it receives this error when a document is created:
TypeError: db.collection(...).document is not a function
at exports.fanOutPosts.functions.firestore.document.onCreate (/workspace/index.js:22:60)
Line 22 is const postCollectionRef = db.collection('friends').document(userID).collection('followers');
I am unsure why this line is causing errors with the .get, but if anyone could point me in the right direction it would be much appreciated!
Given that this is the nodejs API, you'll want to use doc() instead of document(). Other languages might use document().
I found this info via the Admin SDK on CollectionReference https://googleapis.dev/nodejs/firestore/latest/CollectionReference.html
According to the reference, the collection should be defined as the following:
const postCollectionRef = db.collection(`friends/${userId}/followers`);
Using template literals will allow you to dynamically add variables into the collection ref.
I would also take a look into the else logic to use template literals within your return statement.
I'm making an actions on google project that will require adding data to two different Cloud Firestore. For some reason when I trigger the intent, it will only save to the original Cloud Firestore, but not the new one.
For simplicity, I'm going to refer to the original Cloud Firestore as "DB1" and the new one/ second one as "DB2"
Here's what I had tried:
const functions = require('firebase-functions');
const {WebhookClient} = require('dialogflow-fulfillment');
const admin = require('firebase-admin');
const {google} = require('googleapis');
const {
<Basically All of the libraries / AOG functions>
} = require('actions-on-google');
const defaultAppConfig = {"<FIREBASE CREDENTIALS FOR DB1 >"}
const OtherAppConfig = {"<FIREBASE CREDENTIALS FOR DB2>"}
const defaultApp = admin.initializeApp(defaultAppConfig); // DB1
const otherApp = admin.initializeApp(OtherappConfig, 'Other'); // DB2
const db = admin.firestore(functions.config(defaultApp).firebase); //DB1
const ab = admin.firestore(functions.config(otherApp).firebase); // DB2
const app = dialogflow({
debug: true,
clientId: '<DIALOGFLOW CREDENTIALS>'
});
app.intent('DB2 Write', (conv) =>{
conv.ask('Okay I made the write to DB2');
var data = {
name: 'This is a Test write'
};
var setDoc = ab.collection('Test').doc('Write').set(data);
});
exports.dialogflowFirebaseFulfillment = functions.https.onRequest(app);
Sorry if some parts are unnecessary, I wanted to include as much information as I could (I might be missing something that someone else sees).
To sum up what I thought would happen, I thought when I triggered the intent 'DB2 Write' that it would write 'This is a Test Write' to DB2, however it just keeps writing the message/data to DB1.
How do I get this working so it will write to my second Cloud Firestore or "DB2" when this intent is triggered?
Thanks for the help!
Note: If it makes a difference, I'm using the dialogflow inline editor for this code.
____________________________________________________________________________
Update: Here is what I have tried/ updated and it still writes to DB1
const admin = require('firebase-admin');
admin.initializeApp();
const db = admin.firestore();
const otherAdmin = require('firebase-admin');
otherAdmin.initializeApp({
credential: otherAdmin.credential.cert(OtherAppConfig)
},'Other');
const ab = otherAdmin.firestore();
and as well:
admin.initializeApp(defaultAppConfig);
var otherApp = admin.initializeApp(OtherAppConfig, 'other');
console.log(admin.app().name); // '[DEFAULT]'
console.log(otherApp.name); // 'other'
// Use the shorthand notation to retrieve the default app's services
var db = admin.firestore(functions.config().firebase);
// Use the otherApp variable to retrieve the other app's services
var ab = otherApp.firestore(functions.config().firebase);
I'd like to note, the credentials I'm using for "OtherAppConfig" and "defaultAppConfig" were taken from the Firebase private key. ie: firebase console > project overview > service accounts > generate private key. Could this be the problem?
I think the problem is thus:
A Dialogflow project and a Firebase project are the same under the hood. This cool, as your Firebase Functions will know intuitively connect with Dialogflow and your database without a lot of manual configuration.
However, if you have two databases from different Cloud Projects, you will need to do some additional configurations to connect securely. I'm not sure what your AppConfigs contain, but they may not be sufficiently setup. As such, the Firebase setup may be pulling the default (current project) app and database when you're grabbing the functions config.
You may want to, for your second project, download the service key. Then you can load it as a file or directly as JSON in your startup routine.
This snippet below should work the way you want.
// Setup 1st db, this project's db
const admin = require('firebase-admin');
admin.initializeApp(); // Initialize with default params as we get it by default
const db = admin.firestore();
// Setup 2nd db
const otherAdmin = require('firebase-admin'); // We can import twice
const myOtherServiceKey = { ... }
otherAdmin.initializeApp({
credential: otherAdmin.credential.cert(myOtherServiceKey)
});
const ab = otherAdmin.firestore(); // This should be the DB of our second project