How to query firebase for property with specific value inside all children

Question

I have this data structure, where todos are organized to follow path /todos/uid/

{
  \"metausers\" : {
    \"simplelogin:1\" : {
      \"displayName\" : \"Jo         


        

Answer 1

Assuming you have the uid, this should be straightforward with the following:

var uid = "simplelogin:1";
var todosRef = new Firebase("https://yourdb.firebaseio.com/todos/" + uid);
var privateTodosRef = todosRef.orderByChild("private").equalTo(true);
var privateTodos;

privateTodosRef.on("value", function(response) {
  privateTodos = response.val();
});

This should return an object with all of this user's private todos, organized by their todo key (ie "-JUAfv4_-ZUlH7JqM4WZ". If you'd like to use Angularfire you can wrap this in a $firebaseArray and assign it as follows:

$scope.privateTodos = $firebaseArray(privateTodosRef);

Here's a reference for more info on complex queries, and as mentioned in the other responses there are some nice optimizations that can be done with priorities and restructuring.

Happy coding!