AggregateStores vs ProjectionStores

[yonahforst]

Hi again!

I've been struggling to understand why projections are stored differently from aggregates. Aggregates are fetched and stored individually, while projections are fetched and stored as an entire set.

I mean, I kind of understand it. Is it because projections aren't necessarily acting on one record alone as the result of an event? and a single event could cause changes in multiple places?

But then how is this implemented on a datastore level? do you need to deserialize and serialize the entire set each time?

Thanks, as always!