云存储缩略图完成后更新 firebase

Question

I have the following index.js that's triggered when a thumbnail is generated in cloud storage. It seems to work fine.

I'd like to replace the console.log line with code that adds a field like {"thumbnail_done":true} to the firebase document docid found in the script. I'm not clear on how to do that.

exports.thumbComplete = (event, context) => {
  const fname = event.name;
  let suffix = "_200x200.jpeg"
  if (fname.endsWith(suffix)) {
    let docid = fname.substring(0, fname.length - suffix.length);
    console.log(`thumbnail processing complete: ${docid}`);
  }
};

Thanks!

Answer 1

Got it working with the following:

// The Cloud Functions for Firebase SDK to create Cloud Functions and set up triggers.
const functions = require('firebase-functions');

// The Firebase Admin SDK to access Firestore.
const admin = require('firebase-admin');
admin.initializeApp();

exports.generateThumbnail = functions.storage.object().onFinalize(async (object) => {
    const fname = object.name;
    let suffix = "_200x200.jpeg"
    if (fname.endsWith(suffix)) {
        let docid = fname.substring(0, fname.length - suffix.length);
        await admin.firestore().doc(`photo/${docid}`).update({ 'uploaded': true });
    }
});