This site is the only authoritative documentation on routes.rb from rubyonrails.org that I could find:
http://api.rubyonrails.org/classes/ActionDispatch/Routing.html
But this is just a guide—it doesn't methodically list each valid method along with valid arguments. On top of this, there are huge gaps, like the behaviour of get 'controller/action'
without a third argument never once being addressed.
This kind of style is more what I was looking for. Notice how every method is listed and described in order and with uniform formatting. Is there anything like this for the syntax of RoR's routes.rb file?
This Q&A asks my question, but also asks a separate question. Only the separate question is answered, leaving my question unanswered—hence the creation of this new Q&A specifically about the documentation issue.