Android Cloud Functions get data

Question

I'm using Firebase Cloud Functions. I'm trying to count likes on each post. My question is actually in the Cloud functions javascript code. I'm listening to a node in Firebase Databse Realtime that calls "likes". Its Looks like that ->

The Tree is saved like that: PostID -> UserID -> Data

What im trying to do is to get the Data (genre and videoID) in the Cloud Functions.

This is the code

   exports.countlikechange = functions.database.ref('/likes/{postid}/{userUID}').onWrite(event => {
const collectionRef = event.data.ref.parent;
const model = event.data.val();

console.log("model",model);

 const countRef = collectionRef.child('likes');


// Return the promise from countRef.transaction() so our function 
// waits for this async event to complete before it exits.
return countRef.transaction(current => {
  if (event.data.exists() && !event.data.previous.exists()) {
    return (current || 0) + 1;
       }
  else if (!event.data.exists() && event.data.previous.exists()) {
    return (current || 0) - 1;
  }
}).then(() => {
  console.log('Counter updated.');
   });
 });

There is anyway to get the genre and videoId from the node? what should i write? for example: const genre = event.getGenre (something like that)

Frank van Puffelen Frank van Puffelen · Accepted Answer · 2018-01-23T18:59:59

The genre and videoID are in the event.data snapshot that is passed to your function. So:

const model = event.data.val();
let genre = model.genre;
let videoID = model.videoID;

Android Cloud Functions get data

1 Answers