we upgraded to Ext4.2 beta. In the case of an infinite grid with buffered store, store.findExact method throws data.findIndexBy not a function error. The same was working fine in Ext-4.1.
Found that in 4.2, buffered store data is LruCache, which was Ext.util.MixedCollection in 4.1.
We need a way to find records that are in view.Any idea on this?
Attaching the sample testcase