I'm sure that it's nowhere near as productive as Rails, but this framework is probably best positioned to be the Rails of Crystal, in case you haven't seen it:
Re:Ruby vs. Crystal Performance
by kimburgess on Friday June 05, 2020 @09:18PM
(#23435932)
Here you go: https://spider-gazelle.net/
Re:Ruby vs. Crystal Performance
by megavolcano on Saturday June 06, 2020 @12:11PM
(#23440158)
Does it also have a massive community and thousands of libraries(rubygems) for almost every possible thing you can possibly think of?
Re:Ruby vs. Crystal Performance
by kimburgess on Monday June 08, 2020 @06:51AM
(#23455450)
It's a significantly younger language than Ruby, so no, the ecosystem is not as diverse (yet). It is quite populated though - for a taste you can browse at sites like https://crystalshards.xyz/ or https://shards.info/.
Get back to me when there is Crystal on Rails.