CODEWITHSUNDEEP
javascriptjsonfirebasefirebase-realtime-databaseangularfire2
Matt Thomas
Matt Thomas

Reputation: 1115

Firebase Lists vs Objects

quick question about Firebase lists.

I'm trying to access multiple lists to iterate through that are in a single object. The object looks like this:

user : {
    playlists: {}, // List 1
    joined: {},    // List 2
    favorites: {}  // List 3
}

Now I know I can access all three lists by doing three separate requests like:

firebase.list('user/playlists');
firebase.list('user/joined');
firebase.list('user/favorites');

But I'm trying to clean up my code and do it all in one by using:

firebase.list('user');

Then accessing all the lists it returns inside of the user. The only problem is, the lists aren't returned with keys, it just says "object" instead. When I use firebase.object('user') the keys are available.

This is what it looks like when I request 'user' as a list:

As you can see the key is inside the object and not outside of it ($key). How do I go about accessing these objects like I would if the key was actually the key (eg. user.playlists).

Upvotes: 1

Views: 1032

Answers (1)

Matt Thomas
Matt Thomas

Reputation: 1115

For anyone interested I figured it out. I used the .map() to convert parts of the object into arrays.

getPlaylist(_playlistId: string, _query: Object = {}) {

  return this._database.object(`playlists/${_playlistId}`, _query).map(

      result => {

        return {
          info: result.info,
          leader: result.leader,
          favorites: (result.favorites) ? Object.values(result.favorites) : [],
          followers: (result.followers) ? Object.values(result.followers) : [],
          songs: (result.songs) ? Object.values(result.songs) : []
        };

      }

    );
  }

For example, favorites is an object that I want to be returned as a list:

 Check if exists      If exists, map obj to array     else assign to empty array
(result.favorites) ? Object.values(result.favorites) : []

Upvotes: 1

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