CODEWITHSUNDEEP
javascriptfirebaseasync-awaitgoogle-cloud-functions
Leonard Niehaus
Leonard Niehaus

Reputation: 530

Google Cloud / Firebase Functions: await is only valid in async function

I've created this function:

async function getRoomTempFromRoomId(roomId) {
    const querySnapshot = await db.collection("sensors").where("room", "==", roomId).where("type", "==", "temperature").limit(1).get();
    var values = []
    values = querySnapshot.docs.map((doc) => { return doc.data().value });
    return values[0];
}

Now when I call this function using console.log(await getRoomTempFromRoomId("1234")), I receive the following error:

SyntaxError: await is only valid in async function
    at new Script (vm.js:79:7)
    at createScript (vm.js:251:10)
    at Object.runInThisContext (vm.js:303:10)
    at Module._compile (internal/modules/cjs/loader.js:657:28)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
    at Module.load (internal/modules/cjs/loader.js:599:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
    at Function.Module._load (internal/modules/cjs/loader.js:530:3)
    at Module.require (internal/modules/cjs/loader.js:637:17)
    at require (internal/modules/cjs/helpers.js:22:18)
⚠  Your function was killed because it raised an unhandled error.

The same code works on other Firebase projects

Upvotes: 0

Views: 895

Answers (1)

Doug Stevenson
Doug Stevenson

Reputation: 317878

You're not showing it in your question, but the function that contains the call to await getRoomTempFromRoomId is itself not marked async. You can only use await if the function that immediately encloses it is an async function. Not that await will still not work if it's inside an anonymous function that's inside an async function, because the callback function itself is not async.

Upvotes: 2

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