Ruby on Rails - $ rails server fails because uglifier gem could not be found

Question

I\'m starting my first project on Ruby and the tutorial I\'m following has me using rails. When I try to run $ rails server I get an error that says: Could not

Answer 1

I was following these instructions: Installing Ruby, Rails and Rubymine in Ubuntu 14.04

and had the same problem when I got to testing the rails server. while creating the new demo:

abc@ubuntu:~/rails_demo$ rails new demo

An error occurred while installing uglifier (2.5.3), and Bundler cannot continue.Make sure that gem install uglifier -v '2.5.3' succeeds before bundling. run bundle exec spring binstub --al

I did not catch the above until I attempted to run the server

abc@ubuntu:~/rails_demo/demo$ rails server
Could not find gem 'uglifier (>= 1.3.0) ruby' in the gems available on this machine.
Run `bundle install` to install missing gems.
abc@ubuntu:~/rails_demo/demo$ bundle install uglifier
ERROR: "bundle install" was called with arguments ["uglifier"]
Usage: "bundle install [OPTIONS]"

running the following fixed the problem:

gem install uglifier -v '2.5.3'

bundle exec spring binstub --all

hope it helps