Dear friend I saw that thread before BUT it doesn't help me.
Still get this error:
tceel@tceel:~/thingspeak$ rake db:create
/usr/local/lib/ruby/gems/2.2.0/gems/activesupport-4.0.5/lib/active_support/values/time_zone.rb:283: warning: circular argument reference - now
rake aborted!
Bundler::GemRequireError: There was an error while trying to load the gem 'mysql2'.
Gem Load Error is: uninitialized constant Mysql2::Client::SECURE_CONNECTION
Backtrace for gem load error is:
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.
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GETTING CRAZY