I'm trying to write to firestore from an http post trigger, however my doc.data() keeps coming back as undefined, even though it clearly exists. (see screenshots). I did find somewhere that MIGHT have the answer I'm looking for but they want $50 for the POSSIBILITY fo an answer lol.
const admin = require('firebase-admin');
admin.initializeApp({CREDENTIALS});
const db = admin.firestore();
export const helloWorld = functions.https.onRequest(
(request, response) => {
var ref = db.collection('Messages').doc("18438557133");
ref.get().then((doc: any) => {
console.log(doc);
console.log(doc.data());
console.log(doc.exists);
response.end()
});
})
this is the link i found that might be helpful:
https://angularfirebase.com/lessons/dialogflow-with-firebase-cloud-functions/
what am I missing?
The output is suggesting that the document doesn't actually exist. Notice that doc.exists is false, and the documentation for doc.data() says that it will return undefined if the document doesn't exist.
The Firestore SDKs aren't wrong about this sort of thing. You might be looking at a different document than the one you think you're getting. Or you might be looking at a different project than the one where the function is deployed. In any event, you're going to have to take a close look at your deployment to make sure everything is as you expect.
Related
I'm trying to handle the situation when my Slack app (built on top of BoltJS) is removed from a workspace, in order to remove its record from the database.
Here is the section that handles it:
app.event('app_uninstalled', async({team_id}) => {
await db.removeTeam(team_id);
await http.delete(`${constants.BASE_URL}?teamId=${team_id}`);
});
However, the team_id value that is supposed to come from Slack is undefined. I also checked the Slack docs and it seems I should be looking at the team_id parameter, which I do.
I would appreciate any help to see what I'm doing wrong :)
Ok, I found the solution. The team_id parameter should be accessed from the body object, therefore:
app.event('app_uninstalled', async({body}) => {
await db.removeTeam(body.team_id);
await http.delete(`${constants.BASE_URL}?teamId=${body.team_id}`);
});
I want to understand what kind of Firestore database is installed to my box.
The code is running with node.js 9.
If I remove the internet for X minutes and put it back, I can see all the cached transactions going to Firestore (add, updates, deletes).
If I add firebase.firestore().enablePersistence() line after 'firebase.initializeApp(fbconfig), I am getting this error:
Error enabling offline persistence. Falling back to persistence
disabled: FirebaseError: [code=unimplemented]: This platform is either
missing IndexedDB or is known to have an incomplete implementation.
Offline persistence has been disabled.
Now, my question is. If I don't have persistence enabled or can't have it, how come when disconnecting my device from internet, I still have internal transaction going on? Am I really seeing it the proper way?
To me, beside not seeing the console.log() that I have inside the "then()" to batch.commit or transaction.update right away (only when putting back the internet) tells me that I have some kind of internal database persistence, don't you think?
Thanks in advance for your help.
UPDATE
When sendUpdate is called, it looks like the batch.commit is executed because I can see something going on in listenMyDocs(), but the console.log "Commit successfully!" is not shown until the internet comes back
function sendUpdate(response) {
const db = firebase.firestore();
let batch = db.batch();
let ref = db.collection('my-collection')
.doc('my-doc')
.collection('my-doc-collection')
.doc('my-new-doc');
batch.update(ref, { "variable": response.state });
batch.commit().then(() => {
console.log("Commit successfully!");
}).catch((error) => {
console.error("Commit error: ", error);
});
}
function listenMyDocs() {
const firebase = connector.getFirebase()
const db = firebase.firestore()
.collection('my-collection')
.doc('my-doc')
.collection('my-doc-collection');
const query = db.where('var1', '==', "true")
.where('var2', '==', false);
query.onSnapshot(snapshot => {
snapshot.docChanges().forEach(change => {
if (change.type === 'added') {
console.log('ADDED');
}
if (change.type === 'modified') {
console.log('MODIFIED');
}
if (change.type === 'removed') {
console.log('DELETED');
}
});
});
the console.log "Commit successfully!" is not shown until the internet comes back
This is the expected behavior. Completion listeners fire once the data is committed on the server.
Local events may fire before completion, in an effort to allow your UI to update optimistically. If the server changes the behavior that the client raised events for (for example: if the server rejects a write), the client will fire reconciliatory events (so if an add was rejected, it will firebase a change.type = 'removed event once that is detected).
I am not entirely sure if this applies to batch updates though, and it might be tricky to test that from a Node.js script as those usually bypass the security rules.
Dart function (passing token to sendToDevice):
Future<void> _sendNotification() async {
CloudFunctions functions = CloudFunctions.instance;
HttpsCallable callable = functions.getHttpsCallable(functionName: "sendToDevice");
callable.call({
'token': await FirebaseMessaging().getToken(),
});
}
index.ts file where I have defined sendToDevice method.
import * as functions from 'firebase-functions';
import * as admin from 'firebase-admin';
admin.initializeApp();
const fcm = admin.messaging();
export const sendToDevice = functions.firestore
.document('users/uid')
.onCreate(async snapshot => {
const payload: admin.messaging.MessagingPayload = {
notification: {
title: 'Dummy title',
body: `Dummy body`,
click_action: 'FLUTTER_NOTIFICATION_CLICK'
}
};
return fcm.sendToDevice(tokens, payload); // how to get tokens here passed from above function?
}
);
Questions:
How can I receive tokens passed from my Dart function _sendNotification to Typescript's sendToDevice function.
When I was directly passing tokens inside index.ts file, I was getting this exception:
[ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: PlatformException(functionsError, Cloud function failed with exception., {code: UNAUTHENTICATED, details: null, message: UNAUTHENTICATED})
Can anyone please explain if I am supposed to authenticate something here? The command firebase login shows I am already signed in. I am very new to Typescript so please bear with these stupid questions.
Your Flutter side of code seems right, what's wrong is on the Cloud Function.
The sendToDevice function is not a callable function. It is a Cloud Firestore Triggers, it is only meant to be automatically called whenever a document matches users/{uid} is created.
Instead, you'll want to create a Callable Function, see below
export const sendToDevice = functions.https
.onCall(async (data) => {
const { token } = data; // Data is what you'd send from callable.call
const payload: admin.messaging.MessagingPayload = {
notification: {
title: 'Dummy title',
body: `Dummy body`,
click_action: 'FLUTTER_NOTIFICATION_CLICK'
}
};
return fcm.sendToDevice(token, payload);
}
);
You have created a database trigger, what you should do is create a callable function as shown below
exports.sendToDevice = functions.https.onCall(async (data, context) => {
const payload: admin.messaging.MessagingPayload = {
notification: {
title: 'Dummy title',
body: `Dummy body`,
click_action: 'FLUTTER_NOTIFICATION_CLICK'
}
};
return await fcm.sendToDevice(data.token, payload);
});
There are few things to mention here:
1st The function used in 'getHttpsCallable' must be triggered by https trigger (reference here). Here we have a function triggered by firestore document create, so it won't work.
2nd You do not have parameter of your function, but you call it with parameters. If you need example of calling cloud function with parameter you can find it on pud.dev
3rd I do not have at the moment possibility to play with it, but I think that if you implement https triggered function with token parameter you should be able to pass this parameter.
I hope it will help!
UPDATE:
According to doc https triggered function has to be created with functions.https. There is a nice example in the doc. To function triggered this way you can add request body when you can pass needed data.
This answer might not solve your problem but will give you a few things to try, and you'll learn along the way. Unfortunately I wasn't able to get the callable https working with the emulator. I'll probably submit a github issue about it soon. The flutter app keeps just getting different types of undecipherable errors depending on the local URL I try.
It's good that you've fixed one of the problems: you were using document trigger (onCreate) instead of a https callable. But now, you're running a https callable and the Flutter apps needs to communicate with your functions directly. In the future, you could run the functions emulator locally, and do a lot of console.log'ing to understand if it actually gets triggered.
I have a few questions/ things you can try:
Is your user logged in the flutter app? FirebaseAuth.instance.currentUser() will tell you.
Does this problem happen on both iOS and android?
Add some logs to your typescript function, and redeploy. Read the latest logs through StackDriver or in terminal, firebase functions:log --only sendToDevice. (sendToDevice is your callable function name)
Are you deploying to the cloud and testing with the latest deployment of your functions? You can actually test with a local emulator. On Android, the url is 10.0.2.2:5001 as shown above. You also need to run adb reverse tcp:5001 tcp:5001 in the terminal. If you're on the cloud, then firebase login doesn't matter, I think your functions should already have the credentials.
To call the emulator https callable:
HttpsCallable callable = CloudFunctions.instance
.useFunctionsEmulator(origin: "http://10.0.2.2:5001")
.getHttpsCallable(functionName: "sendToDevice");
And iOS you need to follow the solution here.
One mistake I spotted. You should at least do return await fcm.sendToDevice() where you wait for the promise to resolve, because otherwise the cloud function runtime will terminate your function before it resolves. Alternatively, for debugging, instead of returning sendToDevice in your cloud function, you could have saved it into a variable, and console.log'd it. You would see its actually a promise (or a Future in dart's terminology) that hadn't actually resolved.
const messagingDevicesResponse: admin.messaging.MessagingDevicesResponse = await fcm.sendToDevice(
token,
payload
);
console.log({ messagingDevicesResponse });
return;
Make the function public
The problem is asociated with credentials. You can change the security policy of the CF and sheck if the problem is fixed. Se how to manage permisions on CF here
I have a cloud function that sends a welcome email every time a new user registers in the database.
The function correctly executes everything, sends the emails and these are received by the recipient, so far, everything is fine.
It works when I manually write the email address in the function, but when I want it to get the data from the realtime database, it gives me the error:
TypeError: snap.data is not a function
This is the code of my function:
const functions = require('firebase-functions');
const nodemailer = require("nodemailer");
const transport = nodemailer.createTransport({
service: "Gmail",
auth: {
user: "MY_EMAIL",
pass: "MY_EMAIL_PASSWORD"
}
})
exports.welcomeMail = functions.database.ref('/paso1/{id}').onCreate((snap, context) => {
const _name = snap.data().name;
return sendWelcomeMail(_name)
});
// aux functions
function sendWelcomeMail(name) {
return transport.sendMail({
from: "JohnDoe <sender#test.com>",
to: "myfriendemail#gmail.com",
subject: "Hello",
html: `
<h1<Hello ${name} </h1>
<p>nice to seeyou</p>
`
})
.then(r => r)
.catch(e => e);
}
This is my realtime database:
I have reviewed the documentation several times, I have tested with snap.val().{uid}; but all without success, I cannot recover the "name" field from the database.
Using const _name = snap.val().name; I get the same error
I am not sure what is failing.
The method you're looking for is snap.val(), not snap.data(). You might be confusing Realtime Database with Firestore. Firestore uses data() to get the raw data out of a DocumentSnapshot, but that's different than Realtime Database.
You have a typo. You declare snap and then refer to it as snapshot. To fix this problem, make sure the declaration and use match.
You're also using snapshot.data(), while data() doesn't exist on a Realtime Database snapshot (you're probably confusing it with Cloud Firestore).
So combining those two fixes, this should be much closer:
exports.welcomeMail = functions.database.ref('/paso1/{id}')
.onCreate((snapshot, context) => { // this line changed
const _name = snapshot.val().name;
...
I finally found what the mistake was.
Indeed, as you have indicated to me, the correct way to extract the data from the realtime database is by using .val()
However, I told you in the comments to the answers that I kept returning error.
It didn't work because I wasn't initializing the firebase SDK as an ADMIN, necessary to access, among other things, the realtime database.
https://firebase.google.com/docs/admin/setup
I hope my mistake will save other programmers time.
Thanks to all for the help
I’m trying to make an iOS that connects to Stripe and can show user information and data and things.
I’m doing this by using Firebase Functions, so I don’t have to maintain a server, and also because I’m a newb to the extreme.
But when I try to say, get a customer by using the Firebase callable functions, ex.
exports.getCustomer = functions.callableFunctions((data, context) => {
stripe.customers.retrieve(
data.customerID, function (err, customer) {
console.log(‘customer’)
});
});
I’m not sure where to place the “return” in order to actually use that ‘customer’ object in my app. I tried to stick a “return customer” under the console.log, but it’s never....... returning. I’ve also tried creating an empty string variable that I set after the console log and return, but that is always coming up as an empty string on the app.
Sorry for the typesetting issues, and this question is very theoretical - I’m typing on my phone because I don’t want to forget it and I’ll be away from my computer for a while.
Can anyone provide any guidance on how I’d return the ‘customer’ object to my iOS app?
As detailed here, since the release of the Stripe node.js API version 2, they added support for promises: "Every resource method now returns a Promises/A+ compliant promise in addition to supporting the conventional callback".
So you could do as follows:
exports.getCustomer = functions.callableFunctions((data, context) => {
const stripeCustomerID = data.customerID;
return stripe.customers.retrieve(stripeCustomerID)
.then(customer => {
return { customer: customer };
})
.catch(err => {
throw new functions.https.HttpsError('<status error code>', 'xxxxxxx');
});
});
As indicated in the doc, have a look here for the possible values of