Ember fire not synchronizing properly when clearing an array (Cross-post from StackOverflow)

[Matt Mazzola]

See original post: http://stackoverflow.com/questions/36908038/ember-fire-not-synchronizing-properly-when-clearing-an-array

The docs say they monitor stackoverflow, but it wasn't getting many views so I'm duplicating it here, since this place looks much more active.

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I am storing an array of objects in firebase and using the push method from the server as seen below:

  firebaseRef.child('colors').push(body, (error) => {
    if(error) {
      res.send(500, error);
    }
    else {
      res.send(200);
    }

    return next();
  });

And on the client I am using:

model() {
  return this.store.findAll('color');
}

I have an operation where I want to clear the array and I'm currently using set([]) as seen below:

firebaseRef.child('colors').set([], (error) => { ... });

If I look at the data from the management portal I can see the colors node and all elements are removed; however, the ember client still shows all the items in the array. Even after I add an item to the array to make it a length 1 it would still show perhaps 24 if it had 23 previously. It is only after I completely refresh the client does it properly recognize the length of the array.

How do I reset the array in a way which the client stays synchronized without having to remove each element one by one?

[Tim Stirrat]

Hi Matt,

Try using this:

store.unloadAll('color');
firebaseRef.child('colors').set(null, (error) => { ... });

Let me know if you have better success with that. Basically, there is a value watcher on each record, plus a watcher on the top level collection. Each record is trying to unload itself, and some might be getting into a bad state. Doing it pre-emptively should help.

Cheers,

Tim

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