I've already seen some different answers, but none of these helped me...
This is the trick: I have to fix this without touching the Gemfile. I'm currently creating my working environment so that it matches the production server, so, I cannot modify the rails' code at all.
My OS: OSX 10.11
Ruby: ruby 2.0.0p643
The gem is the Gemfile as
gem 'mysql2'. There are no errors when doing
bundle install, but when I try to
rake db:migrate --trace this is the output:
There was an error while trying to load the gem 'mysql2'.
/Users/redar/.rvm/gems/ruby-2.0.0-p643/gems/bundler-1.11.2/lib/bundler/runtime.rb:80:in `rescue in block (2 levels) in require'
/Users/redar/.rvm/gems/ruby-2.0.0-p643/gems/bundler-1.11.2/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
/Users/redar/.rvm/gems/ruby-2.0.0-p643/gems/bundler-1.11.2/lib/bundler/runtime.rb:72:in `block in require'
/Users/redar/redar/config/application.rb:7:in `<top (required)>'
/Users/redar/redar/Rakefile:4:in `<top (required)>'