Firebase Cloud Function在firestore上的事务写入抛出等待作为错误

Question

当我尝试在firestore上执行事务时，它在以下代码上向我抛出错误Unexpected token admin

exports.issueBook = functions.https.onCall(async(data, context) => {
if (!(context.auth && context.auth.token.admin)) {
throw new functions.https.HttpsError(
'unauthenticated',
'only authenticated Admins can Issue Books'
);
}
memberData = {
name: data.issueData.memberName,
no: data.issueData.memberNo,
role: data.issueData.memberRole,
}
transactionData = {
books: data.issueData.books,
creation: new Date(),
member: memberData,
}
var keys = Object.keys(transactionData.books);
var date = new Date();
transactionData.books["takenDate"] = date;
date.setDate(date.getDate() + 7);
var dueDate = date;
if (transactionData.memberRole == "student") {
transactionData.books["dueDate"] = dueDate;
}
const membeRef = admin.firestore().collection('users').doc(transactionData.member.no);
var memberDoc = await membeRef.get();
if (!memberDoc.exists) {
try {
await memberRef.set({
name: data.issueData.memberName,
no: data.issueData.memberNo,
email: data.issueData.memberEmail,
role: data.issueData.memberRole,
created: data.issueData.created,
totalBooks: 5,
})
} catch (error) {
console.log(error);
throw new functions.https.HttpsError(
'unknown',
'New user cannot be created at the moment due to some unknown reasons. Please try again'
);
}
} else {
if (memberDoc.data().role == 'student' && keys.length > memberDoc.data().totalBooks) {
throw new functions.https.HttpsError(
'failed-precondition',
'Student cannot have more than 5 Books'
);
}
}
var transactionBooks = [];
try {
keys.forEach(docNo => {
book = await admin.firestore().collection('books').where("no", "==", docNo).limit(1);
transactionBooks.push(book);
})
} catch (error) {
console.log(error);
throw new functions.https.HttpsError(
'unknown',
'Book Data cannot be read at the moment. Please try again'
);
}
return admin.firestore().runTransaction(transaction => {
return transaction.get(memberRef).then(doc => {
var transactionRef = admin.firestore().collection('transactions').doc();
var transId = '';
// write Transaction
transaction.set(transactionRef, transactionData)
.then(() => { transId = transactionRef.id })
.catch(error => {
console.log(error);
throw new functions.https.HttpsError(
'unknown',
'New user cannot be created at the moment due to some unknown reasons. Please try again'
)
})
transaction.set(memberRef, {
transactionId: transId
}, { merge: true })
transaction.update(membeRef, {
totalBooks: totalBooks - keys.length
});
transactionBooks.forEach(transBook => {
transaction.update(transBook, {
status: false
})
})

})
})
.then(result => {
console.log(result);
return { message: 'Issued' };
})
.catch(error => {
console.log(error);
return error;
});
});

这是我在部署CF 时遇到的错误

=== Deploying to 'library-1be0e'...
i  deploying functions
Running command: npm --prefix "$RESOURCE_DIR" run lint
> functions@ lint /home/abibv/Downloads/Development/PDL Library/Nec-it-Library-PWA/functions
> eslint .

/home/abibv/Downloads/Development/PDL Library/Nec-it-Library-PWA/functions/index.js
150:26  error  Parsing error: Unexpected token admin
✖ 1 problem (1 error, 0 warnings)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! functions@ lint: `eslint .`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the functions@ lint script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR!     /home/abibv/.npm/_logs/2020-04-13T02_13_51_548Z-debug.log
Error: functions predeploy error: Command terminated with non-zero exit code1
Having trouble? Try firebase [command] --help

这是抛出错误的try块

try {
keys.forEach(docNo => {
book = await admin.firestore().collection('books').where("no", "==", docNo).limit(1);
transactionBooks.push(book);
})
} catch (error) {
console.log(error);
throw new functions.https.HttpsError(
'unknown',
'Book Data cannot be read at the moment. Please try again'
);
}

出现此错误的原因是什么？提前感谢。

Answer 1

您正试图在未声明为async的函数中使用await。该函数是传递给forEach的匿名函数lambda。外部函数上的async在这里根本不重要。async/await不适用于嵌套的lambda函数。

考虑一下如何在forEach循环中使用async/await的一些想法：将async/await与forEach环路一起使用