Rspec - uninitialized constant Rails (NameError )

Question

I am trying to use a Rails engine in my rails application.

The rails engine uses a gem called spin.js.

In my rails app, I have in my spec_helper file, this code to include the engine (which is a gem).

require 'mycustomEngine'

When I run rspec I get this error:

C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/spinjs-rails-1.4/lib/spinjs
-rails/engine.rb:2:in `<module:Spinjs>': uninitialized constant Rails (NameError
)
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/spinjs-rails-1
.4/lib/spinjs-rails/engine.rb:1:in `<top (required)>'
        from C:/RailsInstaller/Ruby2.0.0/lib/ruby/gems/2.0.0/gems/spinjs-rails-1

Any ideas why?

Did you solve that problem?

Klaus Turbo
– Klaus Turbo

2017-05-31 20:00:44 +00:00
Commented May 31, 2017 at 20:00 — Klaus Turbo
– Klaus Turbo, Commented May 31, 2017 at 20:00

nickcamillo · Accepted Answer · 2018-02-21 21:23:42Z

3

Depending on how you have your rails_helper / spec_helper configured, you might be requiring the engine (or some other dependency) that tries to access the Rails constant, which doesn't get loaded until you get to the line require File.expand_path('../../config/environment', __FILE__). Try requiring it after that?

answered Feb 21, 2018 at 21:23

nickcamillo

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