如何在我的ubuntu服务器上启动rails控制台

Question

I'm debugging an issue with a rails app on my ubuntu server and i'm trying to start the rails console to run a command, but this is what happens when I try to start the console:

myuser@rails-server1:/var/www/myapp/current$ rails c
The program 'rails' can be found in the following packages:
 * ruby-railties-3.2
 * ruby-railties-4.0
Try: sudo apt-get install <selected package>

Rails is definitely installed because my app is running and the gem is installed in this dir:

/var/www/myapp/shared/bundle/ruby/2.0.0/gems

So how can i actually start the rails console?

Answer 1

bundle exec到救援：

$ bundle exec rails console

Answer 2

I had this same issue once. In my case it had to do with RVM.

Add this to your ~/.bashrc

# This loads RVM into a shell session.
[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm"

This loads rvm each time you load a new terminal session.

Answer 3

First, let's discover how did you install Ruby: by apt-get , rvm or rbenv :

open a shell and type this

# type rbenv | head -1
# type rvm | head -1

each command will return a "xxx is a function" or a "-bash: type: xxx: not found" (where "xxx" is "rbenv" or "rvm").

"xxx is a function" means that you had installed via xxx method.

If both commands returns "xxx: not found", then you had installed via apt-get and you will need to re-install via rbenv or rvm.

Now that you know what manager you had use, let's try to fix the problem.

If you installed via RVM , try this:

# \curl -sSL https://get.rvm.io | bash -s -- --ignore-dotfiles
# echo "source $HOME/.rvm/scripts/rvm" >> ~/.bash_profile

If you installed via RBENV , try this:

# echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bashrc

Close the terminal, re-open and try again your "rails c"

PS: If nothing of this works, try to install another manager (if you are using RVM, try to install via RBENV, and vice-versa).

Answer 4

looks likes rails isn't in your path, so you will need to specify a path to it (and generally speaking . isn't in your path on any sanely configured *nix box)

so try this in /var/www/myapp/current

RAILS_ENV=production ./bin/rails console 

That should get you a console using the version of rails that was installed in your bundle and get you into the correct environment.

Answer 5

Better would be to use bundler when running rails specific command as

"bundle exec RAILS_TASK" like in these case "bundle exec rails s". When using bundler, it will find executable file in their GEM_PATH which is set during installation of ruby.