Data Connect event listener ignored on emulator

[Bindslev]

Related issues

[REQUIRED] Version info

node: 20

firebase-functions: 7.0.0

firebase-tools:

14.26.0

firebase-admin:

13.6.0

[REQUIRED] Test case

Follow this guide: https://firebase.google.com/docs/functions/data-connect-events

Create a listener:

import { onMutationExecuted } from 'firebase-functions/dataconnect';
import { logger } from 'firebase-functions/v2';

export const someListener = onMutationExecuted(
  {
    region: 'europe-west1',
  },
  (event) => {
    console.log(event.data);
    logger.error(event.data);
  }
);

Trigger any mutation using firebase data connect in the firebase console.

It should work when deployed - but doesn't work on emulator.

[REQUIRED] Steps to reproduce

Follow this guide: https://firebase.google.com/docs/functions/data-connect-events

[REQUIRED] Expected behavior

I expected the event listener to be triggered on mutation on emulator, but it only works on deployment. In fact, locally the emulator logs does not even list the listener here:

"functions Loaded functions definitions from source: ..."

[REQUIRED] Actual behavior

Nothing happens - the trigger isn't registered on emulator and therefore no logs are printed.

Were you able to successfully deploy your functions?

Yes, there it works fine.

[google-oss-bot]

I couldn't figure out how to label this issue, so I've labeled it for a human to triage. Hang tight.

[cabljac]

Hi! thanks for raising this, we will investigate and provide updates when available.

[Bindslev]

I realized after creating this, that it might just not be supported yet since it's a completely new feature.

A quick-fix could be to add to the documentation that emulator is not supported maybe? At least I expected it to when it wasn't mentioned and spend quite some hours trying to understand why it wouldn't trigger.

Obviously even better would be if it could be supported :D

[Bindslev]

In case it's true that this functionality is not supported, I have created a wish for it on user voice for others that come across this post: https://firebase.uservoice.com/forums/948424-general/suggestions/50742443-data-connect-event-triggers-on-emulator#comments Upvote and leave a comment if you'd like emulator to be supported

[cabljac]

Hey, thanks! I'll raise this with the team to confirm.