捆绑商看不到已安装的gem（使用RVM）

Question

The gem is in the bundle, but bundler can't see it.

~/rails_projects/xxx $ rake db:migrate
  Could not find rdoc-4.2.0 in any of the sources
  Run `bundle install` to install missing gems.

~/rails_projects/xxx $ bundle show rdoc
  /home/funkdified/.rvm/rubies/ruby-2.2.2/lib/ruby/gems/2.2.0/gems/rdoc-4.2.0

Addendum

~/rails_projects/xxx $ bundle exec rake db:migrate
  Could not find rdoc-4.2.0 in any of the sources
  Run `bundle install` to install missing gems.

bundle install
  Bundle complete! 26 Gemfile dependencies, 93 gems now installed.
  Use `bundle show [gemname]` to see where a bundled gem is installed.

bundle show rdoc
  /home/funkdified/.rvm/rubies/ruby-2.2.2/lib/ruby/gems/2.2.0/gems/rdoc-4.2.0

rvm gemdir
  /home/funkdified/.rvm/gems/ruby-2.2.2@xxx

How can I make bundler see the bundle's gem?

Answer 1

You need to execute in the context of bundler

bundle exec rake db:migrate

This command executes the command, making all gems specified in the Gemfile(5) available to require in Ruby programs.

Answer 2

TRY

gem install bundler

There might be sometimes problem with the bundler gem