CODEWITHSUNDEEP
node.jsfirebasegoogle-cloud-functions
J. Doe
J. Doe

Reputation: 13103

Can not deploy async function to Google Cloud Functions

I am using the newest version of Node, v8.9.1, but I get this error when deploying the code below:

Function load error: Code in file index.js can't be loaded.
Is there a syntax error in your code?
Detailed stack trace: /user_code/index.js:550
  async function deleteQueryBatch(db, query, batchSize, results) {
        ^^^^^^^^

SyntaxError: Unexpected token function

Code (dummy function is needed to get the error):

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

exports.some = functions.firestore.document('x/{x}').onCreate(event => {

})

function deleteCollectionAndReturnDeletedDocs(db, collectionRef, batchSize) {
    return deleteQueryBatch(db, collectionRef.limit(batchSize), batchSize, []);
  }
  async function deleteQueryBatch(db, query, batchSize, results) {
    const snapshot = await query.get();
    if (snapshot.size > 0) {
      let batch = db.batch();
      snapshot.docs.forEach(doc => {
        if (doc.exists) {
          results.push(doc.data())

        };
        batch.delete(doc.ref);
      });
      await batch.commit();
    }
    if (snapshot.size >= batchSize) {
      return deleteQueryBatch(db, query, batchSize, results);
    } else {

      return results;
    }
  }

How can I deploy the async function? I do not get this error on a server on Evennode.

Upvotes: 4

Views: 2058

Answers (3)

Aaron Halvorsen
Aaron Halvorsen

Reputation: 2680

I got this error when deploying my async functions through the Google Cloud Platform. Even though I was running a newer NodeJS version locally I deployed as v6. You can deploy your function as NodeJS v6 or v8. As of January 2019, v6 was the default selection and requires selecting v8(Beta) before deployment.

Upvotes: 0

MHilgers
MHilgers

Reputation: 89

As NodeJS 8.x is LTS now, it should work, right?

When I type "node --version" into my Google Cloud console, it shows me 8.5.0 as version of node.

But when I deploy a script via "gcloud beta functions deploy", I get a "SyntaxError: Unexpected identifier" at the position of my script where the first "await" is used.

So is async/await disabled in the Google Cloud?

Upvotes: 0

Doug Stevenson
Doug Stevenson

Reputation: 317828

Cloud Functions currently runs Node 6 LTS, which means it doesn't support async/await natively. If you want to use some form of async/await, you'll have to transpile your ES7 or TypeScript into ES6 so it can run in the Node container provided by Cloud Functions. The transpiler should convert async/await into equivalent code using promises.

The team is looking into also providing Node 8 LTS.

Upvotes: 4

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