Cloud function - Cannot read property 'Symbol(Symbol.iterator)' of undefined at convertValue

[udox-cameron]

Hey guys,

My cloud firestone function are getting the following error whenever they are triggered, I have seen some people are getting similar error on here and the fix was to upgrade the cloud function library. Unfortunately I have upgraded to version 0.8.0 and still get the following error.

exports.cleanSubmittedUrls = functions.firestore.document('url/{urlid}').onWrite((event) =>  {
	console.log('event.data', event)
	return true;
})

package.json

{
  "name": "functions",
  "description": "Cloud Functions for Firebase",
  "version": "1.0.0",
  "dependencies": {
    "cors": "2.8.3",
    "express": "4.15.3",
    "firebase-admin": "5.7.0",
    "firebase-functions": "0.8.0",
    "secure-compare": "3.0.1",
    "string": "3.3.3"
  },
  "private": true
}

TypeError: Cannot read property 'Symbol(Symbol.iterator)' of undefined at convertValue (/user_code/node_modules/firebase-admin/node_modules/@google-cloud/firestore/src/convert.js:182:44) at convertDocument (/user_code/node_modules/firebase-admin/node_modules/@google-cloud/firestore/src/convert.js:226:22) at Firestore.snapshot_ (/user_code/node_modules/firebase-admin/node_modules/@google-cloud/firestore/src/index.js:376:11) at dataConstructor (/user_code/node_modules/firebase-functions/lib/providers/firestore.js:100:38) at Object. (/user_code/node_modules/firebase-functions/lib/cloud-functions.js:57:31) 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

Thanks,
Cameron

[schmidt-sebastian]

@udox-cameron Do you know if your Firestore document may contain an empty array?

If you can reproduce this, do you mind grabbing the contents of the event object via JSON.stringify(event)? Thanks.

And just to verify, the Firestore dependency you are using is 0.10.x? If you have a package-lock.json or yarn.lock, you might see an older version.

[laurentpellegrino]

@schmidt-sebastian I am getting the exact same error. The document that triggers the function that fails with the error looks as follows:

{
  "attachments": [
    
  ],
  "author": {
    "email": "x@y",
    "fullName": "z",
    "jobTitle": "w"
  },
  "content": {
    "html": "<p>Simple post content<\/p>\n",
    "htmlEscaped": "&lt;p&gt;Simple post content&lt;\/p&gt;\n",
    "markdown": "Simple post content",
    "plaintext": "Simple post content"
  },
  "createdAt": "2018-01-12T14:53:27.097Z",
  "draft": false,
  "draftLabels": {
    "lR7KSMZPgznVJRsd8F0z": 1515768805616
  },
  "excerpt": "Simple post content",
  "forwardToWebhooks": false,
  "labels": {
    "lR7KSMZPgznVJRsd8F0z": true
  },
  "orderedLabels": [
    "lR7KSMZPgznVJRsd8F0z"
  ],
  "publicationTime": "2018-01-12T14:53:00.001Z",
  "slug": "my-title",
  "title": "My title",
  "tstate": false,
  "updatedAt": "2018-01-12T14:53:34.180Z"
}

Firestore version used is 0.10.1.

[schmidt-sebastian]

I was just able to reproduce this. It looks like for empty arrays, ProtobufJS doesn't always return the array type. Thanks for your patience.

[laurentpellegrino]

@schmidt-sebastian Great! Do you have a rough idea of the time it will take to see a public release that fixes the issue?

[udox-cameron]

Hey,

I can't print out the error because I just get the error above. Here is the data it is working with.

{ "beaconfunctionsgroups":[], beacons":["2fUU4F8"], "campaign":"POS", "gid":"orgkey", "status":"updated", "url":"http://bfred-it.github.io/iphone-inline-video/demo/threejs.html", "visibleTime":"2018-01-12T13:49:00.000Z" }

[schmidt-sebastian]

The releases for 0.10.2 and 0.11.1 contain fixes for this issue. Note that the cache on Google Cloud Functions currently still resolves firebase-admin's Firestore dependency to 0.10.1. I will notify this thread when that is no longer the case.

[schmidt-sebastian]

If you redeploy your Functions, you should now be able to get the newest copy from the cache and no longer see this error.

[laurentpellegrino]

Fantastic. Thank you! Le lun. 15 janv. 2018 à 03:58, Sebastian Schmidt <notifications@github.com> a écrit :

…

Note that if you redeploy your Functions, you should now be able to get the newest copy from the cache and no longer see this error. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#103 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAH3gnkvCiCIMSRJgc1iDmLmwhaw9Basks5tKr7HgaJpZM4RanOa> .

[laurentpellegrino]

@schmidt-sebastian Erf, I have updated the dependencies as follows:

    "firebase-admin": "5.6.0",
    "firebase-functions": "^0.8.0",

It seems that GRPC 1.8.0 is fetched. As a consequence, a lot of functions fail with the famous Error: Stream removed :(

[laurentpellegrino]

@schmidt-sebastian Reverting to firebase-admin 5.5.1 and firebase-functions 0.7.5 still fetches the new dependency! Is there a way to force the old dependency so that GRPC is not fetched? that's a big issue since it breaks all our functions at this time.