adding an item to collection causes incorrect notification

GoogleWebComponents / firebase-element

Web components for the Firebase Web API

https://elements.polymer-project.org/elements/firebase-element

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adding an item to collection causes incorrect notification #126

Closed ryanwtyler closed 8 years ago

ryanwtyler commented 8 years ago

https://github.com/GoogleWebComponents/firebase-element/blob/master/firebase-collection.html#L326

when I add an item to a firebase collection in _localDataChanged, change.value is {keySplices: null, indexSplices: null} which causes this if to fail and so ._applySubPathChange gets called incorrectly.