Closed
Description
Related issues
This is related to v4 changes here: https://github.com/firebase/firebase-functions/blame/c0fffcc47dee5cca93683f745b619c0d95cf7339/src/common/providers/database.ts#L123
[REQUIRED] Version info
node: v16.15.0
firebase-functions: 4.4.1
firebase-tools: 12.4.0
firebase-admin: 10.2.0
[REQUIRED] Test case
import * as functions from 'firebase-functions';
export let test = functions
.database
.ref('/test/{id}')
.onWrite((event, context) => console.log(event.after.child('nested/property').val()));
[REQUIRED] Steps to reproduce
Insert any value to realtime database at /test/123/whatever
[REQUIRED] Expected behavior
Calling event.after.child('nested/property').val()) should return null (as it does prior to v4)
[REQUIRED] Actual behavior
TypeError: Cannot read properties of null (reading 'property') at DataSnapshot.val (/workspace/node_modules/firebase-functions/lib/common/providers/database.js:104:32)
Were you able to successfully deploy your functions?
Yes, this is a runtime error.
Footnote
Since the v4 rewrote the exists() as a check to the result of val() it is also affected. And it's really not clear to me how else to check if the nested property exists.