just published a new blog post about Rails Event Store and how you can easily integrate it in a new or existing app from ActiveRecord callbacks to a pub sub system! xamey.xyz/post/?sha=2c... @lukaszreszke.bsky.social @andrzejkrzywda.bsky.social - ThreadSky

xameyz.bsky.social • 44 days ago

just published a new blog post about Rails Event Store and how you can easily integrate it in a new or existing app

from ActiveRecord callbacks to a pub sub system!

https://xamey.xyz/post/?sha=2c00fc79252ddb1fc8c6788ff72752daa8d91127&title=How%20I%20implemented%20Rails%20Event%20Store%20in%20an%20existing%20Rails%20monolith

@lukaszreszke.bsky.social @andrzejkrzywda.bsky.social

Comments

lukaszreszke.bsky.social•41 days ago

@xameyz.bsky.social great post. I noticed that stream is not defined when user events are published. Have you looked into concepts of steams? Extremely helpful when debugging or if you decide to lean more towards event sourcing :)

xameyz.bsky.social•41 days ago

Glad you liked it! I love your library and I've strongly advocated to use it in my team. Currently reading Domain-driven Rails :)

xameyz.bsky.social•41 days ago

I haven't tbh, for debugging, I manually created tables which link the model which automatically triggers the create/update event to the different models that have been created from handlers, so I can construct a graph of causation.
User <-> UserCreated <-> handler <-> created models

xameyz.bsky.social•41 days ago

But I'll take a better look at streams!

lukaszreszke.bsky.social•41 days ago

Seems like you could use streams for that instead of additional tables :) There's a video about streams in our youtube channel. Take a look when you have some time, perhaps it'll explain some of my perspective https://youtu.be/VlSXa5Do_GI

xameyz.bsky.social•32 days ago

Finally watched it! Streams will help me but solely mixed with my additional tables.
Unfortunately, there's no direct link between events: I create an User instance, a handler reacts to UserCreated event, the handler may create an Email instance, and a handler reacts to EmailCreated to send an email

xameyz.bsky.social•32 days ago

Problem is, I don't want my colleagues to bother with additional infos they should provide to the ActiveRecord creation, such as `Email.new(source_event: ...)`
But! I would like to know how that email has been triggered, which in fact is caused by an User creation

xameyz.bsky.social•41 days ago

thanks! I'll watch soon :)

lukaszreszke.bsky.social•41 days ago

“It's not the responsibility of the model to react to its creation: a model should only be aware of its attributes and its relationships.”

Well said!

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