Others have mentioned that automatically processing names this way is
probably a bad idea, but I think it’s interesting to note that this
behaviour is something that is going to change in the next release of
Ruby (2.4).
Currently, the Ruby string methods such as upcase, downcase, strip etc.
only work on ASCII characters; others are left unchanged. This is the
root cause of the issue you are having:
#Ruby 2.3.1
"BJÖRK".downcase #=> "bjÖrk"
But in Ruby 2.4.0.preview1 this works as expected (as do the other
String methods):
"BJÖRK".downcase #=> "björk"
Currently, with Rails, you can use mb_chars to achieve the same result:
"BJÖRK".mb_chars.downcase.to_s #=> "björk"
(I still don’t think you should use this on names though.)
Matt
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