Angular 4 Firebase angularfire Sorting a list by value

Question

I am using Angular 4 Firebase and AngularFire and i have the following firebase database

\"users\" : {
    \"Test1\" : {
      \"totalscore\" : 50,
      \"user         


        

Answer 1

The orderByValue is used when you have a data structure like this:

"userscores" : {
    "Test1" : 50,
    "Test2" : 30,
    "Test3" : 20
    "Test4" : 10,
}

In the above you want to order the results of your query on userscores on the value of each child node.

In your case, the value you want to sort on is in a child property totalscore under users. So you should use orderByChild:

this.topusers = db.list('users', {
    query: {
     orderByChild: "totalscore",
     limitToFirst: 10,
    }
});