Updating a Nested Object With AngularFire2

[Garrett Sanderson]

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I am trying to update my data when a user clicks that they have completed a song. I have already got that user and his array of songs from a service after he/she has logged in. Now when the user clicks complete I want the data to persist. Currently it will only stay completed until the page refreshes. Meaning the database isn't updating fully. Basically I am needing to update a nested object in a JSON file. Any help and explanation on this would be greatly appreciated. Thanks! My code is below. This will update the song until the current page is refreshed. songCompleted(name:string) { for (let song of this.activeUserSongs) { if (song.name == name) { song.completed = true; } } } The Firebase Documentation says to do this... export class AppComponent { items: FirebaseListObservable<any>; constructor(af: AngularFire) { this.items = af.database.list('/messages'); } addItem(newName: string) { this.items.push({ text: newName }); } updateItem(key: string, newText: string) { this.items.update(key, { text: newText }); } deleteItem(key: string) { this.items.remove(key); } deleteEverything() { this.items.remove(); } } Current JSON Looks like this "-KVMWnS8f0ZthDY5mP7G" : { "firstName" : "Garrett", "lastName" : "Sanderson", "partLeader" : false, "singingPart" : "First Tenor", "songs" : [ { "completed" : false, "difficulty" : "Medium", "name" : "America The Beautiful", "parts" : [ { "name" : "Baritone", "urls" : { "pianoWords" : "http://www.taabc.org/check-off-songs/baritone/america-the-beautiful/america-the-beautiful-piano-words.mp3" } Thanks in advance!

[Kato Richardson]

Garrett,

AngularFire2 has a guide on reading and writing data here. You need to call update() if you want the changes to persist to the database.

☼, Kato

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[Garrett Sanderson]

[Kato Richardson]

I don't see anything calling this.items.update() in your code here. The data won't be persisted if you don't call the update() method.

☼, Kato

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[Garrett Sanderson]

Yes I know that I am not calling update. I guess what I am asking is how do I get to that specific key and value in my database that needs to be passed in the update method. All the songs have a completed key and a value that is default to false. How will it know that I only want one of those songs complete key values to change.

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[Garrett Sanderson]

Nevermind Kato. I understand now... I am not grabbing my data in the correct manner. I need to grab it with an observable list so that when I call for a change on it Firebase knows exactly what to change when I call update() with a key and a value.

Thanks!

On Monday, November 14, 2016 at 1:21:57 PM UTC-8, Kato Richardson wrote:

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