onUpdate (and onCreate) function triggered when document is written for the first time #574
Description
[READ] Step 1: Are you in the right place?
[REQUIRED] Step 2: Describe your environment
- Operating System version: MacOS Mojave 10.14.4
- Firebase SDK version:
Python:
firebase-admin==3.1.0; google-api-core==1.14.3; google-api-python-client==1.7.11; google-cloud-core==1.0.3; google-cloud-firestore==1.5.0
Node:
"firebase-admin": "^8.0.0"; "firebase-functions": "^3.1.0" - Library version: _____
- Firebase Product: Firestore; Functions
[REQUIRED] Step 3: Describe the problem
When using Python Firestore client (Admin SDK) to add (collectionRef.add) a document to a collection both onUpdate and onCreate function triggers are called. Only onCreate should be called.
Note: node Admin SDK produces expected result in functions.
Steps to reproduce:
- Write and deploy 2 Firestore functions: onCreate and onUpdate
- Add document with data to a collection
- Check functions logs and see that the onCreate function was called as well as the onUpdate
Relevant Code:
Functions index.js:
const functions = require("firebase-functions");
exports.onNewMessageLength = functions.firestore
.document("messages/{messageId}")
.onCreate((snap, context) => {
console.log("Data: ", snap.data());
return 0;
});
exports.onUpdatedMessageLength = functions.firestore
.document("messages/{messageId}")
.onUpdate((change, context) => {
console.log("Data: ", change.after.data());
return 0;
});
Note: #571
Python:
import firebase_admin
from firebase_admin import credentials
firebase_admin.initialize_app()
from google.cloud import firestore
db = firestore.Client()
db.collection('messages').add({'message':'Hello from Python'})
Result: logs show both onCreate and onUpdate are called.
The outcome of the equivalent Node app seems to be correct. Only onCreate called as documented.
Node:
var admin = require("firebase-admin");
var serviceAccount = require(<PATH_TO_FILE_WITH_JSON>)
admin.initializeApp({credential: admin.credential.cert(serviceAccount), databaseURL:<DB_URL>})
const dbfs = admin.firestore();
dbfs.collection('messages').add({message:'Hello from Node'})
Result: only onCreate is called