在实时数据库中读取对象数据以将其转换为数组的最佳方法

Question

I want to read the data that i have in the realtime firebase, but when i read it, the data comes with objects inside the array, so i cant use *ngFor to access the data like i am use to.

I have this data in the realtime database:

waiting 
   |
   ---------olaaaa 
   |          |
   |          ----------test1
   |         
   ---------olaaaaa2
   |          |
   |         -----------test2

when i read the data, the array comes like this :

{ olaaaa: {}, olaaaa2: {} }

and i don't want that, i want the array to come without the names olaaa and olaaa2. Like this:

{{test},{test2}}

To read i use this:

this.af.object("/waiting").query.once('value')

How can i get the info like arrays and not objects?

Answer 1

I am not familiar with firebase, but what I have read you could add a .then() to your call and format your data using Object.keys(data).map(key => data[key]) which I found from this post

let res = [];
this.af.object("/waiting").query.once('value')
    .then(data => {
        res = Object.keys(data).map(key => data[key]);
     });