CODEWITHSUNDEEP
ionic-frameworkfirebase-realtime-database
frank2k16
frank2k16

Reputation: 97

How to retrieve data from firebase 3.0 in an ionic app?

I have been meddling with the new docs for firebase which can be found here. https://firebase.google.com/docs/database/web/retrieve-data

It was stated there that in order to retrieve data this would be used.

firebase.database().ref('/users/' + userId).once('value').then(function(snapshot) { var username = snapshot.val().username; // ... });

So, in my ionc app i converted it to

firebase.database().ref('/reports/' +'emergency').once('value').then(function(snapshot) {
var user= snapshot.val().name;
console.log(user)
});

Here is a screenshot of my database. My Json Tree in firebase

Problem is i just get an undefined output in the console. Anyone knows how to use and convert this code for ionic? Thanks in advance

Upvotes: 1

Views: 2790

Answers (2)

frank2k16
frank2k16

Reputation: 97

Solved it by listening to child events

var reportRef = firebase.database().ref('/reports/' +'emergency/').orderByKey();
reportRef.on('child_added', function(data) {
 console.log(data.val().email, data.val().name);  
});

Console log now shows results everytime data is saved.

Upvotes: 1

The Dark Knight
The Dark Knight

Reputation: 737

There is no difference what so ever in that code when using ionic. Your problem can be solved by console logging out snapshot.val() you will see that it actually is an object. It should look similar to:

{
key1:{
address:,
email:
...
},
key2:{
address:,
email:
...},
...

}

Basically the problem is that you are calling .name on snapshot.val() which actually is a property of its child.

Upvotes: 1

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