poule | : chicken : A framework for GitHub automation | Automation library

Is it possible to share the code of your component to see where your table is build / initialized, because typically this error should mean that you object joueuerClassement is not an Array so it has not sort function.

When you use push() you create a new unique node under the location where you call it. And that means that when you read the data, you must handle the fact that there can be multiple child nodes.

You're trying to do that in your code by the [0] in this.joueurClassement[0], but if you look at your JSON there is no index 0. Calling push() generates so-called push IDs, which are (for very good reasons partially explained here) not array indexes.

To deal with the extra level of child nodes with unknown keys, you can use Firebase's built-in forEach method:

As far as I could understand, you have 2 different arrays called price and index_date. Actually, they should be in a struct and there should be only 1 array. Here is a query that could work for your use case: