我正在尝试将mysql2转换为postgres。当我运行rake db：create我收到以下错误。
rake aborted!
Gem::LoadError: You have already activated rake 12.3.0, but your Gemfile requires rake 10.4.2. Prepending bundle exec to your command may solve this.
/home/supranimbus12/.rvm/gems/ruby-2.2.3@global/gems/bundler-1.16.1/lib/bundler/runtime.rb:313:in check_for_activated_spec!' /home/supranimbus12/.rvm/gems/ruby-2.2.3@global/gems/bundler-1.16.1/lib/bundler/runtime.rb:31:inblock in setup'
/home/supranimbus12/.rvm/gems/ruby-2.2.3@global/gems/bundler-1.16.1/lib/bundler/runtime.rb:26:in map' /home/supranimbus12/.rvm/gems/ruby-2.2.3@global/gems/bundler-1.16.1/lib/bundler/runtime.rb:26:insetup'
/home/supranimbus12/.rvm/gems/ruby-2.2.3@global/gems/bundler-1.16.1/lib/bundler.rb:107:in setup' /home/supranimbus12/.rvm/gems/ruby-2.2.3@global/gems/bundler-1.16.1/lib/bundler/setup.rb:10:in<top (required)>'
/home/supranimbus12/tracks-2.3.0/config/boot.rb:4:in <top (required)>' /home/supranimbus12/tracks-2.3.0/config/application.rb:1:in<top (required)>'
/home/supranimbus12/tracks-2.3.0/Rakefile:4:in <top (required)>' /home/supranimbus12/.rvm/gems/ruby-2.2.3@global/gems/rake-12.3.0/exe/rake:27:in<top (required)>'
(See full trace by running task with --trace)
答案 0 :(得分：0)
bundle exec rake db:create
并迁移
bundle exec rake db:migrate
答案 1 :(得分：0)
将gem pg添加到Gemfile。
gem 'pg'