Installing Rails - It says I didn't even though I did

Question

I am trying to run a

rails new demo

But am told:

Rails is not currently installed on this system. To get the latest version, simply type:
$ sudo gem install rails
You can then rerun your "rails" command.

I run that command, and many 'fetching' lines followed by many 'Installing RDoc documentation for...' are run, but then the last lines say:

Installing RDoc documentation for rails-3.2.13...
file 'lib' not found

and then it stops running, and the 'rails' command (see above) doesn't work still. Why is Rails not installed? What else should I do? Thanks

I did, but apparently in the wrong place - see below, I just posted an answer, it works now — Lucy Weatherford, Mar 28 '13 at 09:14
Lucy, probably you can use this bash script to install each and every possible tools needed for you to make a development environment up and running with rails: github.com/joshfng/railsready — Surya, Mar 28 '13 at 17:03

score 0 · Answer 1 · edited May 23 '17 at 12:04

0

Looks like this is rdoc related. Short version, try :

gem install rdoc

And then launch the install of rails again.

Look at this answer that seems to have helper a lot of people with this exact problem.

edited May 23 '17 at 12:04

Community

1
1

answered Mar 28 '13 at 09:09

Martin

7,634
1
20
23

score 0 · Accepted Answer · answered Mar 28 '13 at 09:13

0

I solved it: apparently I was trying to install rails in the directory. I did the following and it worked well:

cd /

Then I ran

sudo gem install rails

Then I cd into the relevant directory again and now

rails new demo

worked!

answered Mar 28 '13 at 09:13

Lucy Weatherford

5,452
16
50
76

without installing rails how `rails new demo` works..? i think first time you run `rails new demo` without installing rails – ѕтƒ Mar 28 '13 at 09:24
Why the downvote? I explained here the answer - the initial problem was - it indeed wouldn't install since I tried installing in the wrong location – Lucy Weatherford Mar 28 '13 at 16:45

score 0 · Answer 3 · answered Mar 28 '13 at 11:57

0

It's not a good idea to do a 'sudo gem install rails' since you may experience permission problems with your applications in the future.

I would recommend you using RVM which is a ruby version manager. You can easily install different versions of Rubies, you can create application specific gemset's and minimize possible futuristic 'rails is not currently installed' errors.

I highly recommend you searching and reading about these concepts:

RVM
Gemsets
.rvmrc
.bashrc and .bash_profile

answered Mar 28 '13 at 11:57

scaryguy

7,720
3
36
52

I also installed rvm, but I installed rails too. is that redundant? – Lucy Weatherford Mar 28 '13 at 16:44
Nope. Surely you're supposed to install Rails too. RVM is for installing Rubies and creating gemsets. Make sure you've added RVM to your PATH. See http://stackoverflow.com/questions/8767135/rvm-and-bash-profile – scaryguy Mar 28 '13 at 17:26

Installing Rails - It says I didn't even though I did

3 Answers3