Unconsistent behaviour when converting data types into Swift objects about firebase-ios-sdk HOT 1 CLOSED

This is the intended behavior as the Realtime Database coerces objects with numerical keys to arrays. Specifically, "... if all of the keys are integers, and more than half of the keys between 0 and the maximum key in the object have non-empty values, then Firebase clients will render it as an array." Once you introduce a non-numerical key, the clients know it's an object again.

In practice, that's why you're seeing: [NSNull, NSNull, Bool, Bool, Bool]. The Database treats it as:

"test-dict": {
  "0:" null,
  "1": null,
  "2": true,
  "3": true,
  "4": true
}

See https://firebase.googleblog.com/2014/04/best-practices-arrays-in-firebase.html for more detail

from firebase-ios-sdk.