Trying to delete api key but getting "await is only valid in async function"

Question

I'm trying to delete api keys using AWS SDK JS, but I'm receiving this error message:

{
    "errorType": "Runtime.UserCodeSyntaxError",
    "errorMessage": "SyntaxError: await is only valid in async function",
    "stack": [
        "Runtime.UserCodeSyntaxError: SyntaxError: await is only valid in async function",
        "    at _loadUserApp (/var/runtime/UserFunction.js:98:13)",
        "    at Object.module.exports.load (/var/runtime/UserFunction.js:140:17)",
        "    at Object.<anonymous> (/var/runtime/index.js:36:30)",
        "    at Module._compile (internal/modules/cjs/loader.js:701:30)",
        "    at Object.Module._extensions..js (internal/modules/cjs/loader.js:712:10)",
        "    at Module.load (internal/modules/cjs/loader.js:600:32)",
        "    at tryModuleLoad (internal/modules/cjs/loader.js:539:12)",
        "    at Function.Module._load (internal/modules/cjs/loader.js:531:3)",
        "    at Function.Module.runMain (internal/modules/cjs/loader.js:754:12)",
        "    at startup (internal/bootstrap/node.js:283:19)"
    ]
}

I've tried to create a promise to delete, just like I did to select keys, but I think it might be a problem to do it inside a foreach.

My code:

let sendPromise = null;
let params = {
    includeValues: true,
    limit: 500
};
let dados = null;

sendPromise = new AWS.APIGateway().getApiKeys( params ).promise();

try {
    dados = await sendPromise;
} catch(err) {
    console.error(err, err.stack);
    return criarResposta( 500, `{
        "message": "Erro interno"
    }` );
}

dados.items.forEach( chave => {
    const paramsDeletar = {
        apiKey: chave.id
    };

    sendPromise = new AWS.APIGateway().deleteApiKey( params ).promise();

    try {
        let dadosDeletar = await sendPromise;
    } catch(err) {
        console.error( err, err.stack );
        return criarResposta( 500, `{
            "message": "Erro interno"
        }` );
    }
});

return criarResposta( 200, JSON.stringify( dados ) );

Other thing, do I need to wait for all my promises individually or there is a way of wait for promise's bundle? I can't not wait for my promise, because I'm using lambda, but I wish I could let them running together

score 2 · Answer 1 · answered Jul 05 '19 at 13:02

You have to make an async function for the use of async-await in Nodejs You have to only async keyword in a forEach function

let sendPromise = null;
let params = {
    includeValues: true,
    limit: 500
};
let dados = null;

sendPromise = new AWS.APIGateway().getApiKeys( params ).promise();

try {
    dados = await sendPromise;
} catch(err) {
    console.error(err, err.stack);
    return criarResposta( 500, `{
        "message": "Erro interno"
    }` );
}

dados.items.forEach( async chave => {
    const paramsDeletar = {
        apiKey: chave.id
    };

    sendPromise = new AWS.APIGateway().deleteApiKey( params ).promise();

    try {
        let dadosDeletar = await sendPromise;
    } catch(err) {
        console.error( err, err.stack );
        return criarResposta( 500, `{
            "message": "Erro interno"
        }` );
    }
});

return criarResposta( 200, JSON.stringify( dados ) );

You can find some background on async/await functions [on MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/async_function). — StefanN, Jul 05 '19 at 13:11
**Note: it will NOT WAIT for the deletion promise TO COMPLETE. As foreach loop doesn't support async function** — Aritra Chakraborty, Jul 05 '19 at 14:25

score 1 · Accepted Answer · answered Oct 23 '20 at 01:38

Here you better replace the forEach loop with a for loop, that way will be able to use the await in it:

...
for (const chave of dados.items) {
    const paramsDeletar = {
        apiKey: chave.id
    };

    sendPromise = new AWS.APIGateway().deleteApiKey( params ).promise();

    try {
        let dadosDeletar = await sendPromise;
    } catch(err) {
        console.error( err, err.stack );
        return criarResposta( 500, `{"message": "Erro interno"}` );
    }
}

Trying to delete api key but getting "await is only valid in async function"

2 Answers2