easi-app reviews and mentions

• Make Invalid States Unrepresentable
  1 project | news.ycombinator.com | 27 Apr 2024

  Setting up the constraints took about 30 lines of SQL just for those couple of boolean fields on some of the categories, you can see the details here [2].

  As far as making this a Postgres extension - I'm not sure how useful it would be when the application language doesn't have a notion of sum types. Thinking about it, what might be more useful would be a language-specific library for data validation/constraints that sets up the database constraints as well. I'm not sure, though.

  [1] We weren't using Rust, this was in Go, but I figured this was the most succinct way to summarize it. Our GraphQL schema for this type was basically the equivalent of this.

  [2] https://github.com/CMSgov/easi-app/blob/main/migrations/V164...