iron-list doesn't appear to be observing array changes

[indolering]

I recently ran into trouble with value$= data bindings in iron-list, I wasn't able to replicate that exact issue but it appears as if iron-list isn't observing array change notification declared using computed bindings or observers. I've setup examples of both and if you try to delete a record (which utilizes this.splice), iron-list will not update.

[indolering]

I would think that this is a p0 issue given that this blocks updating values to iron-list elements and essentially breaks data-binding.

[blasten]

@indolering this one does work: http://jsbin.com/qasahupapi/1/edit?html,output iron-list currently doesn't support array filtering in the same way dom-repeat does. That feature is in the backlog and we do want to fully support it. It's just a matter of priorities.

Things to keep in mind:

• Observe to items.* to get notification for splices.
• If the array is mutated without using the Polymer's mutation API, the only way to reflect the changes is to create a copy of the array. That's why you see the array.slice.

Also, this a temporary solution. Generally speaking calling array.slice is just hack here.

Related: #123

[indolering]

Something screwy is still going on in my actual codebase, but updating to 1.2.4 and appending records.* appears to have fixed the majority of issues.

[blasten]

good2know