这是我运行db：migrate时遇到的错误。
rake db:migrate
rake aborted!
You have already activated rake 0.9.2.2, but your Gemfile requires rake 0.9.2. Using bundle exec may solve this.
然后我运行捆绑执行耙 0.9.2，这就是我得到的
'rake aborted!dlopen(/Users/connorphillips/.rvm/gems/ruby-1.9.3-p194/gems/mysql2 0.2.11/lib/mysql2/mysql2.bundle, 9): Library not loaded: libmysqlclient.18.dylib Referenced from: /Users/connorphillips/.rvm/gems/ruby-1.9.3-p194/gems/mysql2-0.2.11/lib/mysql2/mysql2.bundle
Reason: image not found - /Users/connorphillips/.rvm/gems/ruby-1.9.3-p194/gems/mysql2-0.2.11/lib/mysql2/mysql2.bundle'
您可能需要安装正确的 MYSQL2 gem。 在 Gemfile 中，确保包含 mysql2
gem 'mysql2'
然后重新捆绑并尝试
bundle exec rake db:migrate