Cannot read property 'match' of undefined

Related issues

the issue does not solve my problem

[REQUIRED] Version info

{
  "name": "functions",
  "description": "Cloud Functions for Firebase",
  "scripts": {
    "serve": "firebase serve --only functions",
    "shell": "firebase functions:shell",
    "start": "npm run shell",
    "deploy": "firebase deploy --only functions",
    "logs": "firebase functions:log"
  },
  "dependencies": {
    "firebase-admin": "~6.0.0",
    "firebase-functions": "^2.1.0",
    "node-fetch": "^2.3.0"
  },
  "private": true
}

node: 6.0

firebase-functions: .onWrite

[REQUIRED] Expected behavior

call .onwrite and tell me data updated or not

[REQUIRED] Actual behavior

TypeError: Cannot read property ‘match’ of undefined at resourceToInstanceAndPath (/user_code/node_modules/firebase-functions/lib/providers/database.js:170:25) at RefBuilder.changeConstructor (/user_code/node_modules/firebase-functions/lib/providers/database.js:117:38) at cloudFunctionNewSignature (/user_code/node_modules/firebase-functions/lib/cloud-functions.js:104:28) at cloudFunction (/user_code/node_modules/firebase-functions/lib/cloud-functions.js:135:20) at /var/tmp/worker/worker.js:779:24 at process._tickDomainCallback (internal/process/next_tick.js:135:7)

Were you able to successfully deploy your functions?

Yea

[Radzell]

How do you fix this issue if you are already using Node 8?

[tbone849]

I updated all firebase packages to their latest versions and that cleared up my problem. I had a pretty out-of-date firebase-admin package that I believe was the issue.