Rails error method_missing ': undefined `this' method for Gem :: Specification

Question

I follow this guide: https://guides.spreecommerce.com/developer/getting_started_tutorial.html#installing-image-magick When I write

jonstark@jonstark-pc :~/rails_projects/optima1$ spree install --auto-accept 

I got it:

 /home/jonstark/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/specification.rb:2158:in `method_missing': undefined method `this' for #<Gem::Specification:0x4db6d12 activesupport-4.2.0> (NoMethodError) from /home/jonstark/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/specification.rb:1057:in `find_active_stub_by_path' from /home/jonstark/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:64:in `require' from /home/jonstark/.rvm/gems/ruby-2.3.0/gems/activesupport-4.2.0/lib/active_support/core_ext/string.rb:1:in `<top (required)>' from /home/jonstark/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:127:in `require' from /home/jonstark/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:127:in `rescue in require' from /home/jonstark/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:40:in `require' from /home/jonstark/.rvm/gems/ruby-2.3.0/gems/spree_cmd-3.0.6.1/lib/spree_cmd/installer.rb:2:in `<top (required)>' from /home/jonstark/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require' from /home/jonstark/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require' from /home/jonstark/.rvm/gems/ruby-2.3.0/gems/spree_cmd-3.0.6.1/lib/spree_cmd.rb:13:in `<top (required)>' from /home/jonstark/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require' from /home/jonstark/.rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in `require' from /home/jonstark/.rvm/gems/ruby-2.3.0/gems/spree_cmd-3.0.6.1/bin/spree:2:in `<top (required)>' from /home/jonstark/.rvm/gems/ruby-2.3.0/bin/spree:23:in `load' from /home/jonstark/.rvm/gems/ruby-2.3.0/bin/spree:23:in `<main>' from /home/jonstark/.rvm/gems/ruby-2.3.0/bin/ruby_executable_hooks:15:in `eval' from /home/jonstark/.rvm/gems/ruby-2.3.0/bin/ruby_executable_hooks:15:in `<main>' 

My gemfile

 source 'https://rubygems.org' ruby '2.3.0' #ruby-gemset=railstutorial_rails_4_0 gem 'rails', '4.2' gem 'bootstrap-sass' gem 'sprockets' gem 'bcrypt-ruby' gem 'faker' gem 'will_paginate' gem 'bootstrap-will_paginate' gem 'ffaker' gem 'carrierwave', '~> 0.9' gem "font-awesome-rails" gem 'sprockets-rails' gem 'rest-client' gem 'blogo' gem 'fog' gem 'carrierwave-aws' gem "figaro" group :development, :test do gem 'sqlite3' gem 'rspec-rails' end group :test do gem 'selenium-webdriver' gem 'capybara' gem 'factory_girl_rails' end gem 'sass-rails' gem 'uglifier' gem 'coffee-rails' gem 'jquery-rails' gem 'turbolinks' gem 'jbuilder' group :doc do gem 'sdoc', '0.3.20', require: false end group :production do gem 'pg' gem 'rails_12factor' gem 'heroku-deflater' # gem 'unicorn' end 

UPDATE: I created a github problem here https://github.com/spree/spree/issues/7104 and they linked me here https://github.com/rubygems/rubygems/issues/1420

But I still don’t know how to solve my problem.

Answer 1

gem update --system 2.4.8 --no-ri --no-rdoc - fixed details here https://github.com/remomueller/documentation/issues/7

Answer 2

This is a problem in RubyGems 2.5.1, and it is fixed in RubyGems 2.6.3

Just upgrade RubyGems to version 2.6.3 or higher.

 gem update --system 2.6.3 

Or if you use RVM (From alf comment)

 rvm rubygems 2.6.3 

Answer 3

Decline from Ruby 2.3.0 to 2.2.0 fixed this for me