Firebase Cloud Function事务在Firestore上写入会引发等待错误 [英] Firebase Cloud Function Transaction write on firestore throws await as an error
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问题描述
当我尝试在Firestore上进行交易时，在下面的代码上抛出错误Unexpected token admin
When I try to carry out a transaction on firestore, it throws me an error Unexpected token admin on the below code
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
Here is the Error I got while deploying the CF
=== 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
这是引发错误的try块
this is the try block which throws the error
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'
);
}
此错误的原因是什么?预先感谢.
What is the reason for this Error? Thanks in Advance.
推荐答案
您正试图在未声明async的函数中使用await.该函数是您要传递给forEach的匿名函数/lambda.外部函数上的async根本不重要. async/await不适用于嵌套的lambda函数.
You are trying to use await inside a function that is not declared async. The function is the anonymous function/lambda that you're passing to forEach. The async on the outer function doesn't matter at all here. async/await doesn't work with nested lambda functions.
请考虑一些有关如何在forEach循环中使用异步/等待的想法:将async/await与forEach循环一起使用
Consider some ideas on how to work with async/await in forEach loops: Using async/await with a forEach loop
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