CODEWITHSUNDEEP
angularjsionic-frameworkfirebaseangularfire
user3819032
user3819032

Reputation: 21

How to add to a list in Firebase without overwriting

I am trying to create a 'Favorites' section in my app where you hit a button and it is added to a user favorites list in firebase. I am using the ionic platform.

I created a factory to handle the favourites as they come in. and i use the getAuth() function to get the unique userID so i can just pull it when the user logs on. This is my attempt but i am not getting the result i wanted which is simply something like :
< userid >:
{
0: "fav1"
1: "fav2"
}

.factory('Favourites',function($firebaseArray){
  var ref = new Firebase("https://experiencett.firebaseio.com/");
  var authData = ref.getAuth();
  var favs = $firebaseArray(new Firebase('https://experiencett.firebaseio.com/favourites/'+authData.uid+''));
 return {
   all: function() {
   return favs;
 },
 add: function(){
   var up=new Firebase('https://experiencett.firebaseio.com/favourites/');
   var usersref=up.child(authData.uid);
   usersref.push({3:"paria"});
},

Upvotes: 0

Views: 847

Answers (1)

Frank van Puffelen
Frank van Puffelen

Reputation: 600116

When you call push() you are generating a unique id. While that is great for many use-cases, it is not good here since you want to control the path that is written.

Since you're already constructing the path with child(authData.uid) you can simply update it with update():

usersref.child(authData.uid).update({3: "paria"});

This will either update the existing value at 3 or write the new value for 3, leaving all other keys under /users/<uid> unmodified.

Alternatively if you want to replace the data that already exists at users/<users>, you can use set() instead of update().

This is all covered in the Firebase JavaScript SDK in the section on storing user data. It is not covered in the AngularFire documentation, since there is nothing specific to Angular about it.

Upvotes: 1

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