bakerface / easy-source Goto Github PK

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!

Hey there,

I've been reading up on DDD and I'm trying to understand the way the example is structured.

So first, with the aggregates folder: Is an aggregate here equivalent to a DDD aggregate?

I was wondering about value objects and entities and how they should be represented. I assumed that idea, project, and user are each a root entity inside some aggregate, with value objects maybe added directly from the event, without being explicitly modeled in the domain.

But then I looked at the projections folder and saw that projects and ideas are properties of the user which made me think that maybe user is the root entity and idea and project are additional entities inside the same DDD aggregate, and that maybe aggregate here means something different.

Moving on to projections: projects and ideas are initialized as empty arrays on the userRegistered event. Is that where default/initial values should be set? and not in the defaultState of the aggregate?

Thanks so much for your patience and sorry if these questions are really annoying 😜

Hi! I found this repo after finding your dynamodb-event-store 😀

I've been looking for days for something like this; I want to try event sourcing in my serverless app (hosted on aws).

I'm writing to see if this library is just a proof of concept, or something more. I had some issues integrating it with dynamodb-event-store and dynamodb-snapshot-store (just some naming convention stuff that I was able to work around). But I wanted to check with you first before submitting PRs, and see what your plans are with this.

It's really, really nice work! I would love to use it in my app.

Where is the right place to hook into command processing in order to broadcast resulting events to other systems?