Cloud Firestore 文档添加给出错误“参数“数据”的值不是有效的 Firestore 文档。不能使用“未定义”作为 Firestore 值”

Question

I'm working on a react project and this is my very first react project. This code is deployed successfully. But get some errors while testing with postman. I "post" the "createScream" functions's URL and send it. then I got this errors.

Any help towards resolution is highly appreciated. I'm new to react world. Here's my index.json file

const functions = require('firebase-functions');
const admin = require('firebase-admin');

admin.initializeApp();

// // Create and Deploy Your First Cloud Functions
// // https://firebase.google.com/docs/functions/write-firebase-functions
//
 exports.helloWorld = functions.https.onRequest((request, response) => {
  response.send("Hello world");
 });

 exports.getScreams = functions.https.onRequest((req, res)=> {
     admin
     .firestore()
     .collection('screams')
     .get()
     .then(data=>{
         let screams =[];
         data.forEach(doc =>{
             screams.push(doc.data());
         });
         return res.json(screams);
     })
     .catch((err)=> console.error(err));
 });

 exports.createScream = functions.https.onRequest((req, res)=> {
    const newScream = {
        body:req.body.body,
        userHandle: req.body.userHandle,
        createdAt: admin.firestore.Timestamp.fromDate(new Date())
    };

    admin
    .firestore()
    .collection('screams')
    .add(newScream)
    .then((doc)=>{
        res.json({message:'document ${doc.id} created successfully'});
    })
    .catch((err)=>{
        res.status(500).json({ error:'something went wrong'});
        console.error(err);

    });

I got this error message

Error: Value for argument "data" is not a valid Firestore document. Cannot use "undefined" as a Firestore value (found in field body).
    at Object.validateUserInput (E:\survival\TF2\functions\node_modules\@google-cloud\firestore\build\src\serializer.js: 273: 15)
    at Object.validateDocumentData (E:\survival\TF2\functions\node_modules\@google-cloud\firestore\build\src\write-batch.js: 611: 22)
    at CollectionReference.add (E:\survival\TF2\functions\node_modules\@google-cloud\firestore\build\src\reference.js: 1765: 23)
    at exports.createScream.functions.https.onRequest (E:\survival\TF2\functions\index.js: 38: 6)
    at Run (C:\Users\User\AppData\Roaming\npm\node_modules\firebase-tools\lib\emulator\functionsEmulatorRuntime.js: 608: 20)
    at C:\Users\User\AppData\Roaming\npm\node_modules\firebase-tools\lib\emulator\functionsEmulatorRuntime.js: 582: 19
    at Generator.next (<anonymous>)
    at C:\Users\User\AppData\Roaming\npm\node_modules\firebase-tools\lib\emulator\functionsEmulatorRuntime.js: 7: 71
    at new Promise (<anonymous>)
    at __awaiter (C:\Users\User\AppData\Roaming\npm\node_modules\firebase-tools\lib\emulator\functionsEmulatorRuntime.js: 3: 12)

Answer 1

The problem is with this code:

const newScream = {
    body:req.body.body,
    userHandle: req.body.userHandle,
    createdAt: admin.firestore.Timestamp.fromDate(new Date())
};

admin
.firestore()
.collection('screams')
.add(newScream)

When you try to add a document to Cloud Firestore where one of the property values is undefined , you will get this error. This means that at least one of the three properties on newScream is undefined. The error message is telling you which one:

Cannot use "undefined" as a Firestore value (found in field body)

So, the body property is undefined. You'll need to debug your function and figure out why req.body.body is undefined. Perhaps the client isn't passing that value.

Answer 2

Make sure when using postman to change to POST method, On the body section underneath the url, click on the raw option, and on the dropdown that most likely says Text, change it to JSON.

Answer 3

The problem for my case was using userHandle , while in the users i had used handle . I just renamed the value in scream post from userHandle to just handle, see below:

Before

const newScream = {
  body: req.body.body,
  userHandle: req.user.userHandle,
  createdAt: new Date().toISOString(),
};

After Correction

const newScream = {
  body: req.body.body,
  userHandle: req.user.handle,
  createdAt: new Date().toISOString(),
};

Answer 4

I also try to the same coding and I solved the problem.

In postman, you will see the error Cannot use "undefined" as a Firestore value (found in field body). but it's Ok. Because it doesn't have any data in your post URL.

You may be mistaken for the screen to see. Click the body tag under the URL input place. Then select raw . Finally switch to JSON and your problem will be solved. Write the JSON data in the red line in the picture below.

And Then, after writing the JSON data and you press [send] , you will be able to see message :~~ successfully at the under screen.

Try it!

Answer 5

To solve this issue, use the ignoreUndefinedProperties setting on the Firestore instance.

This skips undefined properties during serialization so that they don't get written into the Firestore document in the first place:

import * as admin from 'firebase-admin';

admin.initializeApp();

const firestore = admin.firestore();
firestore.settings({ ignoreUndefinedProperties: true });
const doc = firestore.doc(`demo`);
doc.create({ id: 1, description: undefined }); // works without exception

Answer 6

In my case, I sent the request from postman as raw data, changing the data type to json made it work!

Answer 7

I am working on same project that you worked. i got same error and just rewrite createdScream code, relaunch postman and create new POST request. Then send new request. That works.

Answer 8

I've had this problem as well.

It turns out the mistake I made was that in

const newScream = {
    body:req.body.body,
    userHandle: req.body.userHandle,
    createdAt: admin.firestore.Timestamp.fromDate(new Date())
};

The userHandle in req.body.userHandle has lowercase user while in postman json

{
  'body':'new',
  'UserHandle': 'new'
}

the request sending out has UserHandle uppercase.

I fixed the issue by changing userHandle: req.body.userHandle in js to uppercase UserHandle: req.body.UserHandle .

Make sure whatever in const newScream matches exactly what you are trying to send out in postman json.

Answer 9

I have the same problem and I found another alternative solution by selecting 'x-www-form-urlencoded' in Body of the method 'POST' in Postman. Modify the keys and values then send.

Answer 10

Postman Image

So, I just did firebase deploy , instead of firebase serve and everything worked fine & I was able to add newScream.

Answer 11

make sure that you are using the right endpoint in postman

for every firebase function there should be a unique endpoint

for example: for getScreams function, you have a link

https://us-central1-chat-app-xmx.cloudfunctions.net/getScreams

for createScreams functions you will have another link, for example:

https://us-central1-chat-app-xmx.cloudfunctions.net/createScreams

Now the link you should use in postman for post request is createScreams endpoint and for get request you need to use getScreams endpoint

The error you get is not a big deal because the process need a client to enter some data, but you need to use the right endpoint to send your document successfully to firestore

Answer 12

检查以确保在 Postman 或您正在使用的任何其他 API 中选择了 JSON(application/json)。

Answer 13

For me what solved the problem was fixing the value given to the createdAt property in post request. By giving values to both _seconds and _nanoseconds :

"createdAt":{"_seconds":1623472200,"_nanoseconds":0},

instead of just giving time value

"createdAt": "10:00pm",

Answer 14

Undefined is not an acceptable value in Firestore. And the data you are setting needs to be an object {} not an array []