Fixing ugly Rails uglifier error

More in the notes-to-self to unblock problems with Rails (and ruby in general).

I have just been working on a new project and got the following error when trying to create the very first scaffold:

rails g scaffold crossword_setters name:string setter_type_id:integer 
/home/julian/.rvm/gems/ruby-2.3.0/gems/bundler-1.11.2/lib/bundler/runtime.rb:80:in `rescue in block (2 levels) in require': There was an error while trying to load the gem 'uglifier'. (Bundler::GemRequireError)

Okay? So this is telling me that I am missing a dependency, but keeping the essential details hidden.

A quick bit of searching suggests that uglifier depends on a JavaScript library; I typically  use ‘therubyracer‘.

I was still getting the error after installing both the ‘therubyracer’ and ‘libv8′ gems, having neglected to make sure that it had been enabled in the Gemfile. This last step is the fix.


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