When trying to run rspec, I get “uninitialized constant ActiveModel”

Question

When I run rspec spec I get the following:

/usr/local/lib/ruby/gems/1.9.1/gems/rspec-rails-2.7.0/lib/rspec/rails/extensions/active_record/base.rb:26:in `         


        

Answer 1

Why are you running rspec spec? The typical thing to run is rake spec.

Try bundle exec rspec spec or bundle exec rake spec.

If that doesn't work, try to see if something is wrong with the rest of your environment -- try bundle exec rails console and bundle exec rails server

Another thing to check, is there anything odd in .rspec in your project file, or ~/.rspec?

Answer 2

In my case

  gem "spork-rails", "~> 4.0.0"

was missing in ./Gemfile.

Answer 3

Found this thread while debugging the same symptoms. Here is another reason for the error: I had run

rspec --init

but had failed to run

rails generate rspec:install

Doing the latter fixed the problem.