Gem::LoadError while adding migrations in Rails - ruby-on-rails

Question

When I am running add migrations, i am facing the following issue:
raj#itadmin-HP-Pavilion-17-Notebook-PC:~/Desktop/Projects/invoicemanagement$ rails g migration add_avatars_to_invoice_details avatars:string
Warning: You're using Rubygems 1.8.23 with Spring. Upgrade to at least Rubygems 2.1.0 and run `gem pristine --all` for better startup performance.
/usr/lib/ruby/vendor_ruby/bundler/runtime.rb:33:in `block in setup': You have already activated spring 1.3.3, but your Gemfile requires spring 1.3.2. Using bundle exec may solve this. (Gem::LoadError)
from /usr/lib/ruby/vendor_ruby/bundler/runtime.rb:19:in `setup'
from /usr/lib/ruby/vendor_ruby/bundler.rb:120:in `setup'
from /usr/lib/ruby/vendor_ruby/bundler/setup.rb:7:in `<top (required)>'
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /var/lib/gems/1.9.1/gems/spring-1.3.3/lib/spring/commands.rb:33:in `<module:Spring>'
from /var/lib/gems/1.9.1/gems/spring-1.3.3/lib/spring/commands.rb:4:in `<top (required)>'
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /var/lib/gems/1.9.1/gems/spring-1.3.3/lib/spring/server.rb:9:in `<top (required)>'
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:60:in `require'
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:60:in `rescue in require'
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:35:in `require'
and my Gemfile :
source 'https://rubygems.org'
# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '4.1.4'
#gem 'therubyracer' , '0.12.1', :platforms => :ruby
# Use sqlite3 as the database for Active Record
gem 'sqlite3', :group => [:development, :test]
group :production do
# gem 'thin'
gem 'pg'
end
# Use SCSS for stylesheets
gem 'sass-rails', '~> 4.0.3'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .js.coffee assets and views
gem 'coffee-rails', '~> 4.0.0'
# See https://github.com/sstephenson/execjs#readme for more supported runtimes
# gem 'therubyracer', platforms: :ruby
# Use jquery as the JavaScript library
gem 'jquery-rails'
# Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
#gem 'turbolinks'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.0'
# bundle exec rake doc:rails generates the API under doc/api.
gem 'sdoc', '~> 0.4.0', group: :doc
# Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
gem 'spring', group: :development
# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'
# Use unicorn as the app server
# gem 'unicorn'
# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development
# Use debugger
# gem 'debugger', group: [:development, :test]
gem 'devise'
gem "therubyracer"
gem "less-rails"
gem "twitter-bootstrap-rails"
gem 'carrierwave', '~> 0.9'
gem 'bootstrap-sass', '~> 2.3.2'
gem 'prawn'
gem 'prawnto'
gem 'carmen-rails', '~> 1.0.0'
gem 'jquery-datatables-rails', '~> 3.0.0'
gem 'haml', '~> 4.0.5'
gem 'simple_form'
Previously, the migrations are running fine and I also tried using bundle exec before the add migratiion commmeand, but I found no luck.
Please let me know, where I went wrong.
Thanks in advance.

Answer 1

Spring was updated 20 days ago
Try bundle update spring to try fix this problem. This would not only just update your gem, but also update dependencies.

Answer 2

As the message states, you need to update your version of Rubygems, and then run gem pristine --all.
You can update Rubygems by running gem update --system.
Once you've done that, then you can start looking at prefixing your commands with bundle exec.