Unable to write user record to firestore

[suredoctorofficial]

If i use user.json in on-user-created trigger it gives following error

Error: Argument "data" is not a valid Document. Input is not a plain JavaScript object. at Object.exports.(anonymous function) [as isDocument] (/user_code/node_modules/firebase-admin/node_modules/@google-cloud/firestore/src/validate.js:86:15) at WriteBatch.set (/user_code/node_modules/firebase-admin/node_modules/@google-cloud/firestore/src/write-batch.js:264:14) at DocumentReference.set (/user_code/node_modules/firebase-admin/node_modules/@google-cloud/firestore/src/reference.js:416:8) at exports.onUsercreated.functions.auth.user.onCreate.event (/user_code/index.js:125:17) at Object. (/user_code/node_modules/firebase-functions/lib/cloud-functions.js:59:27) at next (native) at /user_code/node_modules/firebase-functions/lib/cloud-functions.js:28:71 at __awaiter (/user_code/node_modules/firebase-functions/lib/cloud-functions.js:24:12) at cloudFunction (/user_code/node_modules/firebase-functions/lib/cloud-functions.js:53:36) at /var/tmp/worker/worker.js:695:26

If i use user.toJSON() it says method undefined

[laurenzlong]

@suredoctorofficial This was likely fixed in the latest release. Can you update both firebase-functions and firebase-admin to the latest version? And if you still see the issue, please file another issue and provide code sample

[MrGoogol]

"dependencies": {
"firebase": "^4.9.1",
"firebase-admin": "^5.8.2"
}

Error: Argument "data" is not a valid Document. Input is not a plain JavaScript object

[laurenzlong]

@MrGoogol you don't have the right dependencies, you should not need to use "firebase" at all, and you should use the latest "firebase-functions"

[Binghammer]

I am seeing this problem as well. These are my dependencies:

"@google-cloud/firestore": "^0.13.0",
"firebase-admin": "^5.10.0",
"firebase-functions": "^0.9.0",

[laurenzlong]

@Binghammer Can you file a separate issue with a full repro?

[blexo]

was getting this same error... Error: Argument "data" is not a valid Document. Input is not a plain JavaScript object... did this to it... queryAsObject = JSON.parse(JSON.stringify(queryAsObject))

and it worked. so who knows...

[abalone0204]

@blexo cc. @laurenzlong

TL;DR It's not firebase's issue, just need a prototype of Object.

Though this issue has been closed for a while, I might find a potential cause of this.
What @blexo mention works it's because you might send something without prototype of Object,
so this:

// before { key: 'value' }
queryAsObject = JSON.parse(JSON.stringify(queryAsObject))
// after: { key: 'value', __proto__: Object}

Might fix this issue, but you can also use Object.assign({}, queryAsObject) can also do the trick.
The real issue is why your input loses prototype, it's an interesting issue, but beyond the scope of firebase I think.

[VeryVeryGoodNews]

I do not understand the proposed "solution."

I am facing this same issue. I am not sure why this problem has arisen for me following only minor modifications to an index.js file that previously worked.

Please can someone give a clear explanation of how to resolve the issue.

[jdmg94]

I'm also having this issue with versions:

{ 
  "firebase-admin": "6.0.0",
  "firebase-functions": "^2.0.5"
}

tried all the workarounds mentioned above, parsing and stringifying, and vice versa, assigning it to a new object and others all with the same error message:

Error: Argument "data" is not a valid Document. Input is not a plain JavaScript object.
    at Validator.(anonymous function).values [as isDocument] (~/functions/node_modules/@google-cloud/firestore/build/src/validate.js:99:27)

[kamlesh-nb]

I'm also having same issue, anybody found solution, please share.

[laurenzlong]

Hey everyone, firebase-functions uses the Firestore Node SDK under the hood. I found this issue that sounds similar: googleapis/nodejs-firestore#213. Please comment on the issue with the data that you are trying to write to Firestore (ideally code samples) so that it can be diagnosed.

[gaspardip]

The message is not accurate either, just modified a function after months and now i'm hitting this bug.

The code

exports.createUser = functions.auth.user().onCreate(user => {
  const { displayName, email, photoURL, uid } = user;

  const newUser = {
      name: displayName,
      photoURL,
      email,
      active: false,
      complete: false,
  };

  console.log('Writing new user to database (uid, data)', uid, newUser);

  return firestore
    .collection('users')
    .add(uid)
    .set(newUser);
});

Edit: nvm seems my usage was wrong, I was calling .add then .set for whatever reason. Changing it to .doc then .set worked for me.

[anuragsachdeva28]

Hey everyone, I found a similar issue with my project. When I was making a post request from the frontend side, it gave me the error: "Value for argument "data" is not a valid Firestore document. Cannot use "undefined" as a Firestore value (found in field name)"
The issue was resolved for me just by specifying the content-type as application/json in the header object of my PUSH request.
I hope this helps.

[MattSich]

we were versioning our content type header and it ended up causing this issue. Would really like it if firebase would accept versioned content type headers in the future.