Flutter Firebase Functions Error: Database not defined

Question

I've created a delete oldFiles function for my Database that deletes nodes from my chat messages. I've used the example function provided by Firebase and updated it to fit my use. My database structure is databaseName/messages/{pushId} and I've added const functions = require('firebase-functions') and const admin = require('firebase-admin') and admin.initializeApp(). Here is what I have...

exports.deleteOldItems = functions.database.ref('messages/{pushId}').onWrite(async (change) => {
  const ref = change.after.ref.parent; // reference to the parent
  const now = Date.now();
  const cutoff = (DateTime.now().millisecondsSinceEpoch - CUT_OFF_TIME);
  const oldItemsQuery = ref.orderByChild('timestamp').endAt(cutoff);
  const snapshot = await oldItemsQuery.once('value');
  // create a map with all children that need to be removed

  const updates = {};
  snapshot.forEach(child => {
    updates[child.key] = null;
  });
  // execute all updates in one go and return the result to end the function
  return ref.update(updates);
});

When I review my Function logs, I'm getting the following errors...

ReferenceError: DateTime is not defined at exports.deleteOldItems.functions.database.ref.onWrite (/srv/index.js:17:18) at cloudFunction (/srv/node_modules/firebase-functions/lib/cloud-functions.js:131:23) at /worker/worker.js:825:24 at at process._tickDomainCallback (internal/process/next_tick.js:229:7)

And my Functions are finishing with status: error. Any ideas to what may be going on?

Doug Stevenson Doug Stevenson · Accepted Answer · 2020-03-29T07:08:25

DateTime isn't a valid JavaScript object or identifier. If you want to work with dates and times, you will need to work with Date, as you are in the line just above where you have DateTime. You should probably review the JavaScript documentation for Date to learn how it works.

Flutter Firebase Functions Error: Database not defined

1 Answers