Deploy a Cloud Function to different Firebase projects

Question

I have two firebase projects, one for development (project-dev) and one for production (project-prod).

I initialized firebase CLI for writing and deploying cloud functions linked to project-prod. Then I ran firebase use --add and added project-dev so that I can deploy the same function to both projects; I don't want to rewrite the same function twice.

At this point, I faced the problem. Into the function, I have to write something to the realtime database, but when I deploy the function to project-dev it writes to project-prod's database.

What I want to achieve is that the function has to refer to the database of the project that it is deployed to. So that I have one function and when it is deployed to project-dev it writes to project-dev's database and when it is deployed to project-prod it writes to project-prod's database.

Is it possible to achieve that? If not, what's the way to go?

EDIT

Function code:

exports.AddOrders= functions.https.onRequest(async (req, res) => {
    async function addOrder(key, value) {
        var ref = app.database().ref("/orders");
        return ref.child(key).set(value);
    }

    var orders = req.body['orders'];
    var promises = [];
    for (var key in orders) {
        promises.push(addOrder(key, orders[key]));
    }
    Promise.all(promises).then(
        _ => {
            res.sendStatus(200);
            return null;
        }
    ).catch(err => {
        res.send(err);
    })
});

(This function works fine, the problem is that it writes on the wrong database)

Max · Accepted Answer · 2021-03-11 17:20:42Z

14

After you add a project with firebase use --add <projektName> you need to select it with firebase use <projectName>. Then you can deploy to the selected project with firebase deploy or firebase deploy --only functions.

answered Mar 11, 2021 at 17:20

Max

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6 Comments

Max Over a year ago

Do you use any external routes to access the database or are you using the admin sdk?

fabio Over a year ago

I'm using the admin sdk

Max Over a year ago

Can you post the code for your cloud function?

fabio Over a year ago

just edited the question to include the code

Max Over a year ago

How and where are you triggering the cloud functions (both dev and prod)?

|

Max · Accepted Answer · 2021-03-12 08:26:27Z

1

This is the answer for anyone wondering what the problem was.

He was initialising the admin sdk with the credentials of a service account tied to the production project. The solution was to change it to admin.initializeApp() without passing any arguments. This made Firebase use the default credentials for each project.

I know its a common mistake but again, here is the link to the corresponding documentation https://firebase.google.com/docs/admin/setup

answered Mar 12, 2021 at 8:26

Max

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Comments

Dustin Spengler · Accepted Answer · 2023-11-29 15:34:35Z

1

I use firebase use to toggle between my projects and then conditionally initialize my firebase admin code using the following code:

var firebase = require("firebase-admin");
const { projectID } = require("firebase-functions/params");
var path = require('path');
var { serviceAccountDev, serviceAccountProd } = require(path.resolve( __dirname, "./serviceAccountKey.js"));

if (projectID.value() === "myapp-dev") {
   firebase.initializeApp({
      credential: firebase.credential.cert(serviceAccountDev),
      databaseURL: "https://myapp-dev-default-rtdb.firebaseio.com",
   });
} else {
   firebase.initializeApp({
      credential: firebase.credential.cert(serviceAccountProd),
      databaseURL: "https://myapp-default-rtdb.firebaseio.com",
   });
}

edited Nov 29, 2023 at 15:34

answered Nov 29, 2023 at 15:28

Dustin Spengler

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