fall-through-cache add isFromCache()-> Boolean on Lists ~13

[justinbmeyer]

trafficstars

We need a way to know if the data is from the cache or not. This will let developers put the list in a "disabled" state until the real data has loaded.

I suggest an expando method on lists (and possibly instances) like:

todos.isFromCache()

This will be true if the todos is made up of data loaded from the cache. It will be false once data has loaded.

This will allow templates like:

<ul class="{{#todos.isFromCache}}cached{{/todos.isFomCache}}">

And allow for modifications to be disabled.

We should also be able to provide a rejected reason too.

[BigAB]

Does it have to be a method? How about a property that get's removed when it's not from cache?

[justinbmeyer]

@BigAB that doesn't work with DefineMap very well. Also isSaving() isDestroying() isNew() are all methods.

[justinbmeyer]

Also, I don't think removing a property would be a good idea even if it worked. The property would just be set to false.

[justinbmeyer]

this also needs to be able to communicate if there's an error from the cache.

[imjoshdean]

Communicating an error ended up being a property getting called inconsistencyReason which prompted me to change isFromCache to isConsistent in order to provide a unified name for Lists and Maps.