如何解决错误：参数“数据”的值不是有效的Firestore文档无法使用“未定义”作为Firestore的价值
我是MERN Stack的新手，刚开始在Node上工作并创建Login SignUp服务
这是我正在关注的教程https://www.youtube.com/watch?v=m_u6P5k0vP0
我在1:30 Hrs：Mins到达
当我尝试使用POSTMAN登录并使用tokenId生成并传递到scream POST请求的标头后，尝试使用POST请求发布尖叫时，在postman中返回以下错误
**<!DOCTYPE html>
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<meta charset="utf-8">
<title>Error</title>
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<pre>Error: Value for argument "data" is not a valid Firestore document. Cannot use "undefined" as a Firestore value (found in field "userHandle"). If you want to ignore undefined values,enable `ignoreUndefinedProperties`.<br> at validateUserInput (/Users/raza/Desktop/socialape-functions/functions/node_modules/@google-cloud/firestore/build/src/serializer.js:268:19)<br> at Object.validateUserInput (/Users/raza/Desktop/socialape-functions/functions/node_modules/@google-cloud/firestore/build/src/serializer.js:260:13)<br> at Object.validateDocumentData (/Users/raza/Desktop/socialape-functions/functions/node_modules/@google-cloud/firestore/build/src/write-batch.js:641:18)<br> at CollectionReference.add (/Users/raza/Desktop/socialape-functions/functions/node_modules/@google-cloud/firestore/build/src/reference.js:2008:23)<br> at /Users/raza/Desktop/socialape-functions/functions/index.js:95:6<br> at Layer.handle [as handle_request] (/Users/raza/Desktop/socialape-functions/functions/node_modules/express/lib/router/layer.js:95:5)<br> at next (/Users/raza/Desktop/socialape-functions/functions/node_modules/express/lib/router/route.js:137:13)<br> at /Users/raza/Desktop/socialape-functions/functions/index.js:66:12<br> at processTicksAndRejections (internal/process/task_queues.js:97:5)</pre>
</body>
</html>**
这是我的index.js文件
const functions = require("firebase-functions");
const admin = require("firebase-admin");
const app = require("express")();
admin.initializeApp();
const firebaseConfig = {
apiKey: "AIzaSyBSWcDkgu4PHvCxeNHXbdW8l00by4SdUXM",authDomain: "socialape-7830c.firebaseapp.com",databaseURL: "https://socialape-7830c.firebaseio.com",projectId: "socialape-7830c",storageBucket: "socialape-7830c.appspot.com",messagingSenderId: "960517598821",appId: "1:960517598821:web:a53cc5ca90a3f56853e08c",measurementId: "G-7MNYCPGQL6",};
const firebase = require("firebase");
const e = require("express");
firebase.initializeApp(firebaseConfig);
const db = admin.firestore();
//usman question about data.....can data and doc both be any variable names
//Screams GET req
app.get("/screams",(req,res) => {
db.collection("screams")
.orderBy("createdAt","desc")
.get()
.then((data) => {
let screams = [];
data.forEach((doc) => {
screams.push({
screamId: doc.id,body: doc.data().body,userHandle: doc.data().userHandle,createdAt: doc.data().createdAt,});
});
return res.json(screams);
})
.catch((err) => console.error(err));
});
const middleWareAuth = (req,res,next) => {
let idToken;
if(req.headers.authorization && req.headers.authorization.startsWith('Bearer ')){
idToken = req.headers.authorization.split('Bearer ')[1];
}else {
console.error('No token found');
return res.status(403).json({error: 'Unauthorized due to no authorization header token'});
}
admin.auth().verifyIdToken(idToken)
.then(decodedToken => {
req.user = decodedToken;
console.log(decodedToken);
return db.collection('users')
.where('userId','==',req.user.uid)
.limit(1)
.get();
})
.then(data => {
req.user.handle = data.docs[0].data().hanlde;
return next();
})
.catch(err => {
console.error('Error while verifying token ',err);
return res.status(403).json(err);
})
}
//POST one scream
//later on adding middleware authentication as a 2nd argument in ".post('route',2nd argument,res))" for ...
app.post("/scream",middleWareAuth,res) => {
console.log("req check",req);
if (req.body.body.trim() === "") {
return res.status(400).json({ body: "Body must not be empty" });
}
// const newScream = {
// body: req.body.body,// userHandle: req.user.handle,// createdAt: new Date().toISOString()
// };
const newScream = {
body: req.body.body,userHandle: req.user.handle,createdAt: new Date().toISOString(),};
db.collection("screams")
.add(newScream)
.then((doc) => {
res.json({ message: `document ${doc.id} created successfully` });
})
.catch((err) => {
res.status(501).json({ error: "Something went wrong" });
console.error(err);
});
});
//Helper function to check email is not empty
const isEmpty = (string) => {
if (string.trim() === "") return true;
else return false;
};
//Helper function to check if the email is valid
const isEmailValid = (email) => {
const regEx = /^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;
if (email.match(regEx)) return true;
else return false;
};
//Sign Up route
app.post("/signup",res) => {
const newUser = {
email: req.body.email,password: req.body.password,confirmPassword: req.body.confirmPassword,handle: req.body.handle,};
let errors = {};
if (isEmpty(newUser.email)) {
errors.email = "Must not be empty";
} else if (!isEmailValid(newUser.email)) {
errors.email = "Must be a valid email address";
}
//Validation for password and confirmPassword
if (isEmpty(newUser.password)) errors.password = "Must not be empty";
if (newUser.password !== newUser.confirmPassword)
errors.confirmPassword = "Passwords must match";
if (isEmpty(newUser.handle)) errors.handle = "Must not be empty";
//Now checking the errors Object if its empty means no validation error if it has any key in it
//means there is an validation error so lets check
if (Object.keys(errors).length > 0) return res.status(400).json(errors);
//TODO: validate data
let token,userId;
db.doc(`/users/${newUser.handle}`)
.get()
.then((doc) => {
if (doc.exists) {
return res.status(400).json({ handle: "This handle is already taken" });
} else {
return firebase
.auth()
.createUserWithEmailAndPassword(newUser.email,newUser.password);
}
})
.then((data) => {
userId = data.user.uid;
return data.user.getIdToken();
})
.then((idToken) => {
token = idToken;
const userCredentials = {
handle: newUser.handle,email: newUser.email,userId,};
return db.doc(`/users/${newUser.handle}`).set(userCredentials);
})
.then(() => {
return res.status(201).json({ token });
})
.catch((err) => {
console.error(err);
if (err.code === "auth/email-already-in-use") {
return res.status(400).json({ error: "Email is already in use" });
} else {
return res.status(500).json({ error: err.code });
}
});
});
//Login route
app.post("/login",res) => {
const user = {
email: req.body.email,};
//errors empty object
let errors = {};
if (isEmpty(user.email)) errors.email = "Must not be empty";
if (isEmpty(user.password)) errors.password = "Must not be empty";
if (Object.keys(errors).length > 0) return res.status(400).json(errors);
firebase
.auth()
.signInWithEmailAndPassword(user.email,user.password)
.then((data) => {
return data.user.getIdToken();
})
.then((token) => {
return res.json({ token });
})
.catch((err) => {
console.error(err);
if (err.code === "auth/wrong-password") {
return res
.status(401)
.json({ general: "Wrong credentials,please try again" });
} else return res.status(500).json({ error: err.code });
});
});
//www.baseurl.com/api/screams
exports.api = functions.https.onRequest(app);
这是我的package.json文件
**{
"name": "functions","description": "Cloud Functions for Firebase","scripts": {
"serve": "firebase emulators:start --only functions","shell": "firebase functions:shell","start": "npm run shell","deploy": "firebase deploy --only functions","logs": "firebase functions:log"
},"engines": {
"node": "8"
},"main": "index.js","dependencies": {
"express": "^4.17.1","firebase": "^7.19.1","firebase-admin": "^8.10.0","firebase-functions": "^3.6.1"
},"devDependencies": {
"firebase-functions-test": "^0.2.0"
},"private": true
}**
任何帮助将不胜感激，如果您需要更多信息，请告诉我
我正在使用Google Firebase的Cloud FireStore DB。
问候 Syed Hassan Raza
解决方法
在此行
userHandle：req.user.handle
newScream json对象的req.user.handle返回一个未定义的值，导致问题。
,问题已解决。这是因为数据库中的代码[docs]索引为代码[0]，并且我在数据库中有多个用户导致了问题。因此，当我删除所有其他用户（要求除外）时，该问题得到解决。
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