I don't quite understand how the searching works; if I search for "Steve Kemp" I expect to find my own feed, or nothing. Yet instead I get results just including "Steve".

(Wrapping in quotes didn't make a difference, nor did adding AND in the middle.)

You should configure your Rails application correctly for production. Right now it seems like it's considering all requests as local and returning the Rails exception page to me.

if you try this https://feedi.me/search/entries?q=SEO&page=2 you receive an exception because Total are 10. I must improve exception management

can you send me an example of your request?

Absolutely. I'm talking about things that should 404 are actually raising exceptions. E.g. https://feedi.me/popular. I hit this link by mistake but that should return a 404 and not the exception page from Rails.

This generally happens because config.consider_all_requests_local is set to true in production env. By default it should only be true in development and test.

yes because the correct request is https://feedi.me/feeds/popular not "https://feedi.me/popular"

Yes I understand that. But visiting your Rails app shouldn't bubble up the debugging info to your visitor in production.