Query range with START_AT not fetching data as expected

[NordlingDev]

I left another issue (#319) about null not working with EQUAL_TO. This is somewhat related to that issue, but with START_AT. I'm trying to fetch data based on price property. The value of price can either go from 0 (free article) to anything higher.

I have these articles in my database:

{
  "articles": {
    "-article1": {
      "title": "Article 1",
      "price": 0
    },
    "-article2": {
      "title": "Article 2",
      "price": 50
    },
    "-article3": {
      "title": "Article 3",
      "price": 100
    }
  }
}

If I put 0 to the START_AT range, the snapshot function will never fire (neither does the then promise):

firebase.query(snapshot => {
  console.dump(snapshot); // This never fires
}, "/articles", {
  singleEvent: true,
  orderBy: { type: firebase.QueryOrderByType.CHILD, value: "price" },
  range: { type: firebase.QueryRangeType.START_AT, value: 0 }
}).then(() => {
  console.log("TEST"); // This never fires either!
});

If I set the START_AT value to 1 instead, it works. The same type of query works with the official Firebase Node.js (Admin):

admin.database().ref("/articles").orderByChild("price").startAt(0).once("value").then(snapshot => {
  console.log(snapshot.val()); // Logs all articles
});

[EddyVerbruggen]

Does this happen on iOS, Android, or both?

[NordlingDev]

@EddyVerbruggen - Can only speak for iOS. Never tried on Android.