title: `method_missing': undefined method `devise' for User (call 'User.connection' to establish a connection)
body: <p>I am new to Ruby on Rails and am trying to make my first application. I am having issues though anytime I run any <code>rails generate</code> command. I get the following error</p>
  
  <pre><code>MyUsers-MacBook-Pro:MyApp MyUser$ rails generate devise:install
  Warning: Running `gem pristine --all` to regenerate your installed gemspecs (and deleting then reinstalling your bundle if you use bundle --path) will improve the startup performance of Spring.
  /Users/MyUser/.gem/ruby/2.0.0/gems/activerecord-4.1.2.rc1/lib/active_record/dynamic_matchers.rb:26:in `method_missing': undefined method `devise' for User (call 'User.connection' to establish a connection):Class (NoMethodError)
      from /Users/MyUser/.Trash/MyApp/app/models/user.rb:4:in `&lt;class:User&gt;'
      from /Users/MyUser/.Trash/MyApp/app/models/user.rb:1:in `&lt;top (required)&gt;'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/activesupport-4.1.2.rc1/lib/active_support/dependencies.rb:443:in `load'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/activesupport-4.1.2.rc1/lib/active_support/dependencies.rb:443:in `block in load_file'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/activesupport-4.1.2.rc1/lib/active_support/dependencies.rb:633:in `new_constants_in'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/activesupport-4.1.2.rc1/lib/active_support/dependencies.rb:442:in `load_file'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/activesupport-4.1.2.rc1/lib/active_support/dependencies.rb:342:in `require_or_load'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/activesupport-4.1.2.rc1/lib/active_support/dependencies.rb:480:in `load_missing_constant'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/activesupport-4.1.2.rc1/lib/active_support/dependencies.rb:180:in `const_missing'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/activesupport-4.1.2.rc1/lib/active_support/inflector/methods.rb:238:in `const_get'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/activesupport-4.1.2.rc1/lib/active_support/inflector/methods.rb:238:in `block in constantize'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/activesupport-4.1.2.rc1/lib/active_support/inflector/methods.rb:236:in `each'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/activesupport-4.1.2.rc1/lib/active_support/inflector/methods.rb:236:in `inject'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/activesupport-4.1.2.rc1/lib/active_support/inflector/methods.rb:236:in `constantize'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/activesupport-4.1.2.rc1/lib/active_support/dependencies.rb:552:in `get'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/activesupport-4.1.2.rc1/lib/active_support/dependencies.rb:583:in `constantize'
      from /Library/Ruby/Gems/2.0.0/gems/devise-3.2.4/lib/devise.rb:297:in `get'
      from /Library/Ruby/Gems/2.0.0/gems/devise-3.2.4/lib/devise/mapping.rb:77:in `to'
      from /Library/Ruby/Gems/2.0.0/gems/devise-3.2.4/lib/devise/mapping.rb:72:in `modules'
      from /Library/Ruby/Gems/2.0.0/gems/devise-3.2.4/lib/devise/mapping.rb:89:in `routes'
      from /Library/Ruby/Gems/2.0.0/gems/devise-3.2.4/lib/devise/mapping.rb:156:in `default_used_route'
      from /Library/Ruby/Gems/2.0.0/gems/devise-3.2.4/lib/devise/mapping.rb:66:in `initialize'
      from /Library/Ruby/Gems/2.0.0/gems/devise-3.2.4/lib/devise.rb:331:in `new'
      from /Library/Ruby/Gems/2.0.0/gems/devise-3.2.4/lib/devise.rb:331:in `add_mapping'
      from /Library/Ruby/Gems/2.0.0/gems/devise-3.2.4/lib/devise/rails/routes.rb:221:in `block in devise_for'
      from /Library/Ruby/Gems/2.0.0/gems/devise-3.2.4/lib/devise/rails/routes.rb:220:in `each'
      from /Library/Ruby/Gems/2.0.0/gems/devise-3.2.4/lib/devise/rails/routes.rb:220:in `devise_for'
      from /Users/MyUser/.Trash/MyApp/config/routes.rb:2:in `block in &lt;top (required)&gt;'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/actionpack-4.1.2.rc1/lib/action_dispatch/routing/route_set.rb:337:in `instance_exec'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/actionpack-4.1.2.rc1/lib/action_dispatch/routing/route_set.rb:337:in `eval_block'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/actionpack-4.1.2.rc1/lib/action_dispatch/routing/route_set.rb:315:in `draw'
      from /Users/MyUser/.Trash/MyApp/config/routes.rb:1:in `&lt;top (required)&gt;'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/activesupport-4.1.2.rc1/lib/active_support/dependencies.rb:241:in `load'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/activesupport-4.1.2.rc1/lib/active_support/dependencies.rb:241:in `block in load'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/activesupport-4.1.2.rc1/lib/active_support/dependencies.rb:232:in `load_dependency'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/activesupport-4.1.2.rc1/lib/active_support/dependencies.rb:241:in `load'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/railties-4.1.2.rc1/lib/rails/application/routes_reloader.rb:40:in `block in load_paths'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/railties-4.1.2.rc1/lib/rails/application/routes_reloader.rb:40:in `each'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/railties-4.1.2.rc1/lib/rails/application/routes_reloader.rb:40:in `load_paths'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/railties-4.1.2.rc1/lib/rails/application/routes_reloader.rb:16:in `reload!'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/railties-4.1.2.rc1/lib/rails/application/routes_reloader.rb:26:in `block in updater'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/activesupport-4.1.2.rc1/lib/active_support/file_update_checker.rb:75:in `call'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/activesupport-4.1.2.rc1/lib/active_support/file_update_checker.rb:75:in `execute'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/railties-4.1.2.rc1/lib/rails/application/routes_reloader.rb:27:in `updater'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/railties-4.1.2.rc1/lib/rails/application/routes_reloader.rb:7:in `execute_if_updated'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/railties-4.1.2.rc1/lib/rails/application/finisher.rb:71:in `block in &lt;module:Finisher&gt;'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/railties-4.1.2.rc1/lib/rails/initializable.rb:30:in `instance_exec'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/railties-4.1.2.rc1/lib/rails/initializable.rb:30:in `run'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/railties-4.1.2.rc1/lib/rails/initializable.rb:55:in `block in run_initializers'
      from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/tsort.rb:150:in `block in tsort_each'
      from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
      from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/tsort.rb:219:in `each_strongly_connected_component_from'
      from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/tsort.rb:182:in `block in each_strongly_connected_component'
      from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/tsort.rb:180:in `each'
      from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/tsort.rb:180:in `each_strongly_connected_component'
      from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/tsort.rb:148:in `tsort_each'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/railties-4.1.2.rc1/lib/rails/initializable.rb:54:in `run_initializers'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/railties-4.1.2.rc1/lib/rails/application.rb:300:in `initialize!'
      from /Users/MyUser/.Trash/MyApp/config/environment.rb:5:in `&lt;top (required)&gt;'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/activesupport-4.1.2.rc1/lib/active_support/dependencies.rb:247:in `require'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/activesupport-4.1.2.rc1/lib/active_support/dependencies.rb:247:in `block in require'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/activesupport-4.1.2.rc1/lib/active_support/dependencies.rb:232:in `load_dependency'
      from /Users/MyUser/.gem/ruby/2.0.0/gems/activesupport-4.1.2.rc1/lib/active_support/dependencies.rb:247:in `require'
      from /Library/Ruby/Gems/2.0.0/gems/spring-1.1.3/lib/spring/application.rb:92:in `preload'
      from /Library/Ruby/Gems/2.0.0/gems/spring-1.1.3/lib/spring/application.rb:140:in `serve'
      from /Library/Ruby/Gems/2.0.0/gems/spring-1.1.3/lib/spring/application.rb:128:in `block in run'
      from /Library/Ruby/Gems/2.0.0/gems/spring-1.1.3/lib/spring/application.rb:122:in `loop'
      from /Library/Ruby/Gems/2.0.0/gems/spring-1.1.3/lib/spring/application.rb:122:in `run'
      from /Library/Ruby/Gems/2.0.0/gems/spring-1.1.3/lib/spring/application/boot.rb:18:in `&lt;top (required)&gt;'
      from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
      from /Library/Ruby/Site/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
      from -e:1:in `&lt;main&gt;'
  </code></pre>
  
  <p>Even if I don't add the <code>gem 'devise'</code> into my Gemfile I still get that error. I even created a new application and get that error.</p>
  
  <p>I have even tried the answers at <a href="https://stackoverflow.com/questions/24148723/undefined-method-devise-for-user">undefined method &#39;devise&#39; for User</a></p>
  
  <p>Any idea how I can get rid of this error?</p>
  
  <p><strong>EDIT</strong>
  I currently do not have any models
  <img src="https://i.stack.imgur.com/jWs79.png" alt="enter image description here"></p>