This is awesome to see that it's possible. I've always wondered about the same sort of concept, but instead it would be trying to use Crystal to run the latest Rails version. I lack the time/energy/knowledge to try it, but it would be interesting to see how close you could get to either power or port Rails to Crystal, and if it would even be worth it (in terms of speed and type safety, etc).
My understanding is that this tends to be difficult because certain really-dynamic-stuff that Ruby offers (effectively metaprogramming) are not supported by Crystal, but are heavily used by Rails.
On the other hand, Amber offers a look of what a Crystal rewrite of Rails would look like
Well, you'd have to move a whole lot of code generation from load time to compile time, including the stuff based on db layout. So quite a bit of work.
I mean, by making some changes to Rails source code, it was possible to get a simple "hello world" to display.
Presumably you'd run into more bugs if you tried to do more than that.
Rails does have a test suite (hopefully Rails 1.0 had a decent one?) , I guess the interesting experiment would be how much code do you have to change to get Rails 1.0 test suite to pass on ruby 3.3.
Safe to say quite a bit more than for the hello world to run!
> it was possible to get a simple "hello world" to display.
That's not really the whole story. It was possible to generate a hello world web application server.
Would've been interesting to see if other generators, generated migrations, models, controllers, views and tests worked (scaffolding blog posts and comments).
