Issue with Firebase Cloud function.. not able to read parameters - node.js

Question

I am not uunderstanding why this is not working, as it is basic.
Here is my code:
// Init cloud functions
const functions = require('firebase-functions');
const admin = require('firebase-admin');
// Used to access entire JSON Nodes as Admin...
admin.initializeApp();
exports.verifyIAP = functions.database.ref('/Users/{userid}/IAP/{groupid}/{rdate}')
.onCreate((snapshot, context) => {
const groupId = context.params.groupid;
console.log('GroupID: ', groupId);
const receiptDate = context.params.rdate;
console.log('receipt Date: ', receiptDate);
const userId = context.params.userid;
console.log('UserID: ', userId);
const receipt = snapshot.val().ReceiptData;
console.log('receipt Data: ', receipt);
});
When the function triggers, the log shows all the variables as undefined!?
What am I missing!?

Answer 1

Your function is working fine. I just tested it and the problem can be pointed on how you insert the data. For testing purposes, Here's a sample code I used to insert data and trigger the function:
// Import Admin SDK
var admin = require("firebase-admin");
var serviceAccount = require("./*******.json");
admin.initializeApp({
credential: admin.credential.cert(serviceAccount),
databaseURL: "https://********.firebaseio.com/"
});
var db = admin.database();
var ref = db.ref("Users");
ref.set({
"userId" : {
"IAP" : {
"groupId" : {
"rdate" : {
"ReceiptData" : "testVAl"
}
}
}
}
}).then(result => {
console.log('done')
process.exit(0)
});