Type streams empty? about ecommerce HOT 3 CLOSED

Hey, it seems that we forgot to add subscribers to create such streams. New apps from template have them already enabled:

  # Subscribe event handlers below
  Rails.configuration.event_store.tap do |store|
    # store.subscribe(InvoiceReadModel.new, to: [InvoicePrinted])
    # store.subscribe(lambda { |event| SendOrderConfirmation.new.call(event) }, to: [OrderSubmitted])
    # store.subscribe_to_all_events(lambda { |event| Rails.logger.info(event.event_type) })

    store.subscribe_to_all_events(RailsEventStore::LinkByEventType.new)
    store.subscribe_to_all_events(RailsEventStore::LinkByCorrelationId.new)
    store.subscribe_to_all_events(RailsEventStore::LinkByCausationId.new)
  end

Behind the scenes these "of type" streams are made with linking: https://github.com/RailsEventStore/rails_event_store/blob/0c0e0d35fe5925c587b92c10e3707c9719fae61c/ruby_event_store/lib/ruby_event_store/link_by_metadata.rb#L43-L55

Enabling them for sample application would be a great contribution.

Perhaps Browser should also be improved to not suggest such browsing streams if they don't exist. That's something to be changed within RailsEventStore. Aside: application can suggest related streams for the Browser to display: https://railseventstore.org/docs/v2/browser/#related-streams

from ecommerce.

Thanks for the quick reply! Tangential question: why put the code for this example in lib and not app/{commands,events,aggregates}?

from ecommerce.

Thanks for the quick reply! Tangential question: why put the code for this example in lib and not app/{commands,events,aggregates}?

We're aiming to group by bounded contexts (i.e. kitchen, bathroom) in this application, rather than group by technical belonging (sinks, lights). Ultimately our goal is to lift those contexts outside rails application directory.

Related:

• https://blog.arkency.com/rails-components-neither-engines-nor-gems/
• https://martinfowler.com/bliki/BoundedContext.html
• https://www.youtube.com/watch?v=arsK-CN5YDg # wroc_love.rb 2013 | The Not-So-Big Software Design by Reginald Braithwaite
• https://www.youtube.com/watch?v=WpkDN78P884 # Ruby Midwest 2011 | Architecture the Lost Years by Robert Martin

from ecommerce.