Yard Sale - event-driven e-commerce

Overview of My Submission

Yard Sale was an idea of old to enable people to list things they have for sale and let them manage the list. I used the opportunity of the hackathon to play with a few technologies and patterns I did not know well enough, so the project is more technical than visually appealing.

These technologies were:

• Event sourcing - I had previous experience, but I wanted to do it with available libraries, not home-baked solution
• Specific read models generated from events and optimized for read (these are in MongoDB in this case, while event store is PostgreSQL)
• Rails 7 on Ruby 3.1 with Hotwire
• TailwindCSS for server-side rendered content (spoiler: oit's rather not worth it)
• SDLand for seeds (see my post about seeds-driven development)

Demo: https://yard-sale-dev.herokuapp.com/

Submission Category:

E-Commerce Creation

Link to Code

katafrakt / yard_sale

This is a test project for Mongo Atlas hackathon. It uses RailsEventStore with PostgreSQL as an event store and MongoDB on Atlas for read models.

Demo: https://yard-sale-dev.herokuapp.com/

View on GitHub

Additional Resources / Info

Open source used:

• Ruby on Rails 7 with Hotwire on Ruby 3.1
• RailsEventStore with PostgreSQL as event store
• Mongo driver (as Mongoid is not ready for Rails 7, but it's a good thing, because it forced me to use repositories)
• TailwindCSS with style inspired by:
  • Nordic Store
  • Notus
• dry-rb

Screenshots

Home page:

Sale view:

Offer view:

RailsEventStore dashboard (available in dev env only):