How to change Rails app into UTF-8

Not only on Rails, we sometimes encounter following error message of MySQL.

Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation '='.

So following commands may helps you.

NOTE: These commands' paths are based on Debian GNU/Linux.

Especially on Rails, `rake:reset` is the key point. Without this you cannot reset the tables.

Good luck.