Ruby on Rails server won't run [duplicate] - ruby-on-rails

This question already has answers here:
Error launching Rails server: undefined method 'configure'
(5 answers)
Closed 8 years ago.
Why is my server not running when I try to start my application? I have node.js installed and I believe I have execjs installed as well which neither fixed the issue. No idea what the problem is. Yes I am new so cut me some slack please! Thanks
C:\Users\My-Name\first_app>rails server
=> Booting WEBrick
=> Rails 4.0.8 application starting in development on http://0.0.0.0:3000
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server
Exiting
C:/Users/My-Name/first_app/config/environments/development.rb:1:in `<top (required)>': undefined method `configure' for #<FirstApp::Application:0x3b67c30>(NoMethodError)
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/activesupport-4.0.8/lib/active_support/dependencies.rb:229:in `require'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/activesupport-4.0.8/lib/active_support/dependencies.rb:229:in `block in require'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/activesupport-4.0.8/lib/active_support/dependencies.rb:214:in `load_dependency'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/activesupport-4.0.8/lib/active_support/dependencies.rb:229:in `require'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/railties-4.0.8/lib/rails/engine.rb:591:in `block (2 levels) in <class:Engine>'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/railties-4.0.8/lib/rails/engine.rb:590:in `each'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/railties-4.0.8/lib/rails/engine.rb:590:in `block in <class:Engine>'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/railties-4.0.8/lib/rails/initializable.rb:30:in `instance_exec'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/railties-4.0.8/lib/rails/initializable.rb:30:in `run'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/railties-4.0.8/lib/rails/initializable.rb:55:in `block in run_initializers'
from C:/Ruby200/lib/ruby/2.0.0/tsort.rb:150:in `block in tsort_each'
from C:/Ruby200/lib/ruby/2.0.0/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
from C:/Ruby200/lib/ruby/2.0.0/tsort.rb:210:in `block (2 levels) in each_strongly_connected_component_from'
from C:/Ruby200/lib/ruby/2.0.0/tsort.rb:219:in `each_strongly_connected_component_from'
from C:/Ruby200/lib/ruby/2.0.0/tsort.rb:209:in `block in each_strongly_connected_component_from'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/railties-4.0.8/lib/rails/initializable.rb:44:in `each'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/railties-4.0.8/lib/rails/initializable.rb:44:in `tsort_each_child'
from C:/Ruby200/lib/ruby/2.0.0/tsort.rb:203:in `each_strongly_connected_component_from'
from C:/Ruby200/lib/ruby/2.0.0/tsort.rb:182:in `block in each_strongly_connected_component'
from C:/Ruby200/lib/ruby/2.0.0/tsort.rb:180:in `each'
from C:/Ruby200/lib/ruby/2.0.0/tsort.rb:180:in `each_strongly_connected_component'
from C:/Ruby200/lib/ruby/2.0.0/tsort.rb:148:in `tsort_each'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/railties-4.0.8/lib/rails/initializable.rb:54:in `run_initializers'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/railties-4.0.8/lib/rails/application.rb:215:in `initialize!'
from C:/Users/Devin Miller/first_app/config/environment.rb:5:in `<top (required)>'
from C:/Users/Devin Miller/first_app/config.ru:3:in `require'
from C:/Users/Devin Miller/first_app/config.ru:3:in `block in <main>'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `instance_eval'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `initialize'
from C:/Users/Devin Miller/first_app/config.ru:in `new'
from C:/Users/Devin Miller/first_app/config.ru:in `<main>'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `eval'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `new_from_string'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:40:in `parse_file'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/rack-1.5.2/lib/rack/server.rb:277:in `build_app_and_options_from_config'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/rack-1.5.2/lib/rack/server.rb:199:in `app'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/railties-4.0.8/lib/rails/commands/server.rb:48:in `app'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/rack-1.5.2/lib/rack/server.rb:314:in `wrapped_app'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/railties-4.0.8/lib/rails/commands/server.rb:75:in `start'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/railties-4.0.8/lib/rails/commands.rb:76:in `block in <top (required)>'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/railties-4.0.8/lib/rails/commands.rb:71:in `tap'
from C:/Ruby200/lib/ruby/gems/2.0.0/gems/railties-4.0.8/lib/rails/commands.rb:71:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'

FirstApp? I guess you are taking the Hartl's tutorial. How did you install rails?
If you installed via rails installer for windows, probably you have a version higher than 4.0.8 and you manually switched version in Gemfile which is not good in this case. If this is the scenario, install 4.0.8 from the beginning and create firstapp with it. [1]
There are few syntax changes for development.rb, buy I think even if you manually change text there it will not work. You can try changing Rails.application.configure.do to FirstApp::Application.configure.do
Please tell me how is going. I will try to update my answer when you give more information.
[1]:
$ rails -v
$ gem uninstall rails --version VERSION
$ gem install rails --version VERSION

Related

Running rails server on bash a linux system on windows

I am following this steps to install ruby on rails in ubuntu or linux subsystem on windows 10.
But this time, I used the updated ruby which is version 2.3.3, rails which is version 5.0.0.1, but after successfull installation of all the requirements, I tried to run this
rails new ruby_app
in the path /mnt/c/xampp/htdocs/ which is in windows local c and after a successfull installation I tried running this.
rails server
I got this problem
/home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.0.0.1/lib/rails/app_loader.rb:40: warning: Insecure world writable dir /home/fil/.rbenv/versions in PATH, mode 040777
=> Booting Puma
=> Rails 5.0.0.1 application starting in development on http://localhost:3000
=> Run `rails server -h` for more startup options
Exiting
/home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/rb-inotify-0.9.7/lib/rb-inotify/watcher.rb:74:in `initialize': Invalid argument - Failed to watch "/home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0.1/lib/active_support/locale": the given event mask contains no legal events; or fd is not an inotify file descriptor. (Errno::EINVAL)
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/rb-inotify-0.9.7/lib/rb-inotify/notifier.rb:190:in `new'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/rb-inotify-0.9.7/lib/rb-inotify/notifier.rb:190:in `watch'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/rb-inotify-0.9.7/lib/rb-inotify/notifier.rb:204:in `watch'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/listen-3.0.8/lib/listen/adapter/linux.rb:32:in `_configure'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/listen-3.0.8/lib/listen/adapter/base.rb:45:in `block in configure'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/listen-3.0.8/lib/listen/adapter/base.rb:40:in `each'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/listen-3.0.8/lib/listen/adapter/base.rb:40:in `configure'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/listen-3.0.8/lib/listen/adapter/base.rb:63:in `start'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/listen-3.0.8/lib/listen/backend.rb:28:in `start'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/listen-3.0.8/lib/listen/listener.rb:67:in `block in <class:Listener>'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/listen-3.0.8/lib/listen/fsm.rb:120:in `instance_eval'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/listen-3.0.8/lib/listen/fsm.rb:120:in `call'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/listen-3.0.8/lib/listen/fsm.rb:91:in `transition_with_callbacks!'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/listen-3.0.8/lib/listen/fsm.rb:57:in `transition'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/listen-3.0.8/lib/listen/listener.rb:90:in `start'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0.1/lib/active_support/evented_file_update_checker.rb:90:in `boot!'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0.1/lib/active_support/evented_file_update_checker.rb:61:in `initialize'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0.1/lib/active_support/i18n_railtie.rb:59:in `new'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0.1/lib/active_support/i18n_railtie.rb:59:in `initialize_i18n'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0.1/lib/active_support/i18n_railtie.rb:15:in `block in <class:Railtie>'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0.1/lib/active_support/lazy_load_hooks.rb:36:in `execute_hook'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0.1/lib/active_support/lazy_load_hooks.rb:45:in `block in run_load_hooks'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0.1/lib/active_support/lazy_load_hooks.rb:44:in `each'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/activesupport-5.0.0.1/lib/active_support/lazy_load_hooks.rb:44:in `run_load_hooks'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.0.0.1/lib/rails/application/finisher.rb:65:in `block in <module:Finisher>'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.0.0.1/lib/rails/initializable.rb:30:in `instance_exec'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.0.0.1/lib/rails/initializable.rb:30:in `run'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.0.0.1/lib/rails/initializable.rb:55:in `block in run_initializers'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/2.3.0/tsort.rb:228:in `block in tsort_each'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/2.3.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/2.3.0/tsort.rb:431:in `each_strongly_connected_component_from'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/2.3.0/tsort.rb:349:in `block in each_strongly_connected_component'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/2.3.0/tsort.rb:347:in `each'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/2.3.0/tsort.rb:347:in `call'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/2.3.0/tsort.rb:347:in `each_strongly_connected_component'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/2.3.0/tsort.rb:226:in `tsort_each'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/2.3.0/tsort.rb:205:in `tsort_each'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.0.0.1/lib/rails/initializable.rb:54:in `run_initializers'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.0.0.1/lib/rails/application.rb:352:in `initialize!'
from /mnt/c/xampp/htdocs/ruby_app/config/environment.rb:5:in `<top (required)>'
from /mnt/c/xampp/htdocs/ruby_app/config.ru:3:in `require_relative'
from /mnt/c/xampp/htdocs/ruby_app/config.ru:3:in `block in <main>'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/rack-2.0.1/lib/rack/builder.rb:55:in `instance_eval'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/rack-2.0.1/lib/rack/builder.rb:55:in `initialize'
from /mnt/c/xampp/htdocs/ruby_app/config.ru:in `new'
from /mnt/c/xampp/htdocs/ruby_app/config.ru:in `<main>'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/rack-2.0.1/lib/rack/builder.rb:49:in `eval'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/rack-2.0.1/lib/rack/builder.rb:49:in `new_from_string'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/rack-2.0.1/lib/rack/builder.rb:40:in `parse_file'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/rack-2.0.1/lib/rack/server.rb:318:in `build_app_and_options_from_config'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/rack-2.0.1/lib/rack/server.rb:218:in `app'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.0.0.1/lib/rails/commands/server.rb:59:in `app'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/rack-2.0.1/lib/rack/server.rb:353:in `wrapped_app'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.0.0.1/lib/rails/commands/server.rb:124:in `log_to_stdout'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.0.0.1/lib/rails/commands/server.rb:77:in `start'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:90:in `block in server'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:85:in `tap'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:85:in `server'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:49:in `run_command!'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/railties-5.0.0.1/lib/rails/commands.rb:18:in `<top (required)>'
from /mnt/c/xampp/htdocs/ruby_app/bin/rails:9:in `require'
from /mnt/c/xampp/htdocs/ruby_app/bin/rails:9:in `<top (required)>'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/spring-2.0.0/lib/spring/client/rails.rb:28:in `load'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/spring-2.0.0/lib/spring/client/rails.rb:28:in `call'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/spring-2.0.0/lib/spring/client/command.rb:7:in `call'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/spring-2.0.0/lib/spring/client.rb:30:in `run'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/spring-2.0.0/bin/spring:49:in `<top (required)>'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/spring-2.0.0/lib/spring/binstub.rb:31:in `load'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/gems/2.3.0/gems/spring-2.0.0/lib/spring/binstub.rb:31:in `<top (required)>'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require'
from /home/fil/.rbenv/versions/2.3.3/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require'
from /mnt/c/xampp/htdocs/ruby_app/bin/spring:14:in `<top (required)>'
from bin/rails:3:in `load'
from bin/rails:3:in `<main>'
Can you give idea what is this? how to solve it?
Don't have enough reputation to post as comment but this should provide some answers: https://github.com/rails/rails/issues/26054
Seems to be a windows related issue from last month.
Haven't used ruby on rails in quite a while so I can't reproduce or test (right now) to see if this is true.
From a comment wich was helpful to others:
Go to you config/environments/development.rb and comment out the last
line, something about watching files and listen gem. can't remember
from the top of my head the exact wording, but it is the last line of
config
this is new a new method that rails uses to watch changed files, but
it doesn't work on WSL
I think guard gem will also fail because of this
Bottom line:
Using rails new --skip-spring --skip-listen gives you a working app

Rbenv says Ruby 2.1.2 isn't installed even after I installed it

When I used rails s to initiate the Rails server I get this.
➜ zumin-share git:(master) rails s
rbenv: version `2.1.2' is not installed (set by /Users/ericxavierdoyle/Eric_Dev/ElliotWhyte/zumin-share/.ruby-version)
I then try to install rbenv 2.1.2 and the installer should be finished. I checked Rbenv version and I get.
rbenv version
2.1.2 (set by /Users/ericxavierdoyle/Eric_Dev/ElliotWhyte/zumin-share/.ruby-version)
I thought it was the .ruby-version file giving me trouble and when I removed it I get.
rails s
/usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/smart_listing-1.0.0/lib/smart_listing/config.rb:73: warning: duplicated key at line 79 ignored: :href
/usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/ansi-1.4.3/lib/ansi/chart.rb:26: warning: duplicated key at line 29 ignored: :concealed
=> Booting Thin
=> Rails 4.2.0 application starting in development on http://localhost:3000
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server
Exiting
/usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/application/configuration.rb:110:in `database_configuration': Cannot load `Rails.application.database_configuration`: (RuntimeError)
Could not load database configuration. No such file - ["config/database.yml"]
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/activerecord-4.2.0/lib/active_record/railtie.rb:117:in `block (2 levels) in <class:Railtie>'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/lazy_load_hooks.rb:38:in `instance_eval'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/lazy_load_hooks.rb:38:in `execute_hook'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/lazy_load_hooks.rb:28:in `block in on_load'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/lazy_load_hooks.rb:27:in `each'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/lazy_load_hooks.rb:27:in `on_load'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/activerecord-4.2.0/lib/active_record/railtie.rb:116:in `block in <class:Railtie>'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/initializable.rb:30:in `instance_exec'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/initializable.rb:30:in `run'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/initializable.rb:55:in `block in run_initializers'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/2.2.0/tsort.rb:226:in `block in tsort_each'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/2.2.0/tsort.rb:348:in `block (2 levels) in each_strongly_connected_component'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/2.2.0/tsort.rb:429:in `each_strongly_connected_component_from'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/2.2.0/tsort.rb:347:in `block in each_strongly_connected_component'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/2.2.0/tsort.rb:345:in `each'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/2.2.0/tsort.rb:345:in `call'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/2.2.0/tsort.rb:345:in `each_strongly_connected_component'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/2.2.0/tsort.rb:224:in `tsort_each'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/2.2.0/tsort.rb:203:in `tsort_each'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/initializable.rb:54:in `run_initializers'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/application.rb:352:in `initialize!'
from /Users/ericxavierdoyle/Eric_Dev/ElliotWhyte/zumin-share/config/environment.rb:5:in `<top (required)>'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:274:in `require'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:274:in `block in require'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:240:in `load_dependency'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:274:in `require'
from /Users/ericxavierdoyle/Eric_Dev/ElliotWhyte/zumin-share/config.ru:3:in `block in <main>'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/builder.rb:55:in `instance_eval'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/builder.rb:55:in `initialize'
from /Users/ericxavierdoyle/Eric_Dev/ElliotWhyte/zumin-share/config.ru:in `new'
from /Users/ericxavierdoyle/Eric_Dev/ElliotWhyte/zumin-share/config.ru:in `<main>'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/builder.rb:49:in `eval'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/builder.rb:49:in `new_from_string'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/builder.rb:40:in `parse_file'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/server.rb:299:in `build_app_and_options_from_config'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/server.rb:208:in `app'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands/server.rb:61:in `app'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/server.rb:336:in `wrapped_app'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands/server.rb:139:in `log_to_stdout'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands/server.rb:78:in `start'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:80:in `block in server'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:75:in `tap'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:75:in `server'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/railties-4.2.0/lib/rails/commands.rb:17:in `<top (required)>'
from /Users/ericxavierdoyle/Eric_Dev/ElliotWhyte/zumin-share/bin/rails:8:in `require'
from /Users/ericxavierdoyle/Eric_Dev/ElliotWhyte/zumin-share/bin/rails:8:in `<top (required)>'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/spring-1.2.0/lib/spring/client/rails.rb:27:in `load'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/spring-1.2.0/lib/spring/client/rails.rb:27:in `call'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/spring-1.2.0/lib/spring/client/command.rb:7:in `call'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/spring-1.2.0/lib/spring/client.rb:26:in `run'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/spring-1.2.0/bin/spring:48:in `<top (required)>'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/spring-1.2.0/lib/spring/binstub.rb:11:in `load'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/spring-1.2.0/lib/spring/binstub.rb:11:in `<top (required)>'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /usr/local/var/rbenv/versions/2.2.3/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /Users/ericxavierdoyle/Eric_Dev/ElliotWhyte/zumin-share/bin/spring:16:in `<top (required)>'
from bin/rails:3:in `load'
from bin/rails:3:in `<main>'
What am I doing wrong?
Your .ruby-version file is used by rbenv to detect what version of Ruby to use(besides looking in this file rbenv also looks in RBENV_VERSION environment variable if it's specified, and some other files). So in your case specified Ruby version was 2.1.2 and since it's not installed on your system rbenv complained about that, but since rbenv looks on few other places to detect what version of Ruby to use it found some other version and used it to run your code.
After installing version 2.1.2 your system now have version defined in your .ruby-version and rbenv will use it to run your code, but since your gems are installed for version of Ruby that you were using before 2.1.2 you'll get errors. At least I think that's what is going on, it would be great if some experienced programmer can comment on this.

Can not start rails server after changing gem file

I just started the Ruby on Rails Tutorial by Michael Hartl. I am currently trying to get the exact same gems versions (listing 1.5 in the book) he uses to avoid future problems. I managed to run bundle update and bundle install with no problems but when I try to start the server by rails server I get error you will see below.
The only main difference I can spot between his dev environment and mine is that I use rbenv and set the local ruby version for the project to 2.0.0-p353, and he uses RVM with ruby version 2.0.0. Could this be causing the problem? I can't find a ruby 2.0.0 version (without any -p...) on rbenv.
Thank you for your help!!
=> Booting WEBrick
=> Rails 4.0.5 application starting in development on http://0.0.0.0:3000
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server
Exiting
/Users/eduardopoleo/Desktop/rails_projects/first_app/config/environments/development.rb:1:in `<top (required)>': undefined method `configure' for #<FirstApp::Application:0x007ff71196dee8> (NoMethodError)
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/activesupport-4.0.5/lib/active_support/dependencies.rb:229:in `require'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/activesupport-4.0.5/lib/active_support/dependencies.rb:229:in `block in require'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/activesupport-4.0.5/lib/active_support/dependencies.rb:214:in `load_dependency'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/activesupport-4.0.5/lib/active_support/dependencies.rb:229:in `require'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/railties-4.0.5/lib/rails/engine.rb:591:in `block (2 levels) in <class:Engine>'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/railties-4.0.5/lib/rails/engine.rb:590:in `each'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/railties-4.0.5/lib/rails/engine.rb:590:in `block in <class:Engine>'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/railties-4.0.5/lib/rails/initializable.rb:30:in `instance_exec'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/railties-4.0.5/lib/rails/initializable.rb:30:in `run'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/railties-4.0.5/lib/rails/initializable.rb:55:in `block in run_initializers'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/2.0.0/tsort.rb:150:in `block in tsort_each'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/2.0.0/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/2.0.0/tsort.rb:210:in `block (2 levels) in each_strongly_connected_component_from'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/2.0.0/tsort.rb:219:in `each_strongly_connected_component_from'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/2.0.0/tsort.rb:209:in `block in each_strongly_connected_component_from'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/railties-4.0.5/lib/rails/initializable.rb:44:in `each'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/railties-4.0.5/lib/rails/initializable.rb:44:in `tsort_each_child'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/2.0.0/tsort.rb:203:in `each_strongly_connected_component_from'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/2.0.0/tsort.rb:182:in `block in each_strongly_connected_component'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/2.0.0/tsort.rb:180:in `each'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/2.0.0/tsort.rb:180:in `each_strongly_connected_component'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/2.0.0/tsort.rb:148:in `tsort_each'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/railties-4.0.5/lib/rails/initializable.rb:54:in `run_initializers'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/railties-4.0.5/lib/rails/application.rb:215:in `initialize!'
from /Users/eduardopoleo/Desktop/rails_projects/first_app/config/environment.rb:5:in `<top (required)>'
from /Users/eduardopoleo/Desktop/rails_projects/first_app/config.ru:3:in `require'
from /Users/eduardopoleo/Desktop/rails_projects/first_app/config.ru:3:in `block in <main>'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `instance_eval'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `initialize'
from /Users/eduardopoleo/Desktop/rails_projects/first_app/config.ru:in `new'
from /Users/eduardopoleo/Desktop/rails_projects/first_app/config.ru:in `<main>'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `eval'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `new_from_string'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:40:in `parse_file'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/rack-1.5.2/lib/rack/server.rb:277:in `build_app_and_options_from_config'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/rack-1.5.2/lib/rack/server.rb:199:in `app'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/railties-4.0.5/lib/rails/commands/server.rb:48:in `app'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/rack-1.5.2/lib/rack/server.rb:314:in `wrapped_app'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/railties-4.0.5/lib/rails/commands/server.rb:75:in `start'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/railties-4.0.5/lib/rails/commands.rb:76:in `block in <top (required)>'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/railties-4.0.5/lib/rails/commands.rb:71:in `tap'
from /Users/eduardopoleo/.rbenv/versions/2.0.0-p353/lib/ruby/gems/2.0.0/gems/railties-4.0.5/lib/rails/commands.rb:71:in `<top (required)>'
from bin/rails:8:in `require'
from bin/rails:8:in `<main>'

rails server not starting after switching form version 4 to version 3

I am using rails version 3.2.6 and i recently downgraded from 4.0 because i wanted to work on a 3 version environment because the tutorial im following they are using version 3.
I am on a windows 7 machine and this is what i have done so far.
i first did gem install rails -v 3.2.6
then i did gem uninstall rails, and chose the version i wanted to install.
i then downgraded the gem that were dependent on rails version 4 and i was not getting any errors when running bundle install.
now when i try to do rails s to see what broke on my page the server never starts and i get a bunch of file names:
=> Booting WEBrick
=> Rails 3.2.6 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
Exiting
C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activerecord-3.2.6/lib/active_record/dynamic_matchers.rb:50:in `method_missing'C:/Ruby200- x64/lib/ruby/gems/2.0.0/gems/orm_adapter-0.5.0/lib/orm_adapter/adapters/active_record.rb:81: warning: already initialized constant ActiveRecord::Base::OrmAdapter
C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/orm_adapter-0.5.0/lib/orm_adapter/adapters/active_record.rb:81: warning: previous definition of OrmAdapter was here
: undefined method `migration_error=' for #<Class:0x000000053c7850> (NoMethodError)
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activerecord-3.2.6/lib/active_record/railtie.rb:66:in `block (3 levels) in <class:Railtie>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activerecord-3.2.6/lib/active_record/railtie.rb:65:in `each'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activerecord-3.2.6/lib/active_record/railtie.rb:65:in `block (2 levels) in <class:Railtie>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/lazy_load_hooks.rb:36:in `instance_eval'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/lazy_load_hooks.rb:36:in `execute_hook'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/lazy_load_hooks.rb:43:in `block in run_load_hooks'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/lazy_load_hooks.rb:42:in `each'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/lazy_load_hooks.rb:42:in `run_load_hooks'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activerecord-3.2.6/lib/active_record/base.rb:721:in `<top (required)>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/devise-3.2.4/lib/devise/orm/active_record.rb:3:in `<top (required)>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:251:in `require'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:251:in `block in require'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:236:in `load_dependency'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:251:in `require'
from C:/Users/Beans/Desktop/TestMaker/config/initializers/devise.rb:22:in `block in <top (required)>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/devise-3.2.4/lib/devise.rb:288:in `setup'
from C:/Users/Beans/Desktop/TestMaker/config/initializers/devise.rb:3:in `<top (required)>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:245:in `load'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:245:in `block in load'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:236:in `load_dependency'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:245:in `load'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/engine.rb:588:in `block (2 levels) in <class:Engine>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/engine.rb:587:in `each'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/engine.rb:587:in `block in <class:Engine>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/initializable.rb:30:in `instance_exec'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/initializable.rb:30:in `run'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/initializable.rb:55:in `block in run_initializers'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/initializable.rb:54:in `each'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/initializable.rb:54:in `run_initializers'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/application.rb:136:in `initialize!'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/railtie/configurable.rb:30:in `method_missing'
from C:/Users/Beans/Desktop/TestMaker/config/environment.rb:5:in `<top (required)>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:251:in `require'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:251:in `block in require'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:236:in `load_dependency'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:251:in `require'
from C:/Users/Beans/Desktop/TestMaker/config.ru:3:in `block in <main>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/rack-1.4.5/lib/rack/builder.rb:51:in `instance_eval'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/rack-1.4.5/lib/rack/builder.rb:51:in `initialize'
from C:/Users/Beans/Desktop/TestMaker/config.ru:in `new'
from C:/Users/Beans/Desktop/TestMaker/config.ru:in `<main>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/rack-1.4.5/lib/rack/builder.rb:40:in `eval'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/rack-1.4.5/lib/rack/builder.rb:40:in `parse_file'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/rack-1.4.5/lib/rack/server.rb:200:in `app'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/commands/server.rb:46:in `app'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/rack-1.4.5/lib/rack/server.rb:304:in `wrapped_app'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/rack-1.4.5/lib/rack/server.rb:254:in `start'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/commands/server.rb:70:in `start'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/commands.rb:55:in `block in <top (required)>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/commands.rb:50:in `tap'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-3.2.6/lib/rails/commands.rb:50:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'
i know this might be a bunch of garbage to some, but if someone could help me that would be awesome. if you need more information, please let me know.
thank you in advance.
Since i am using rails on windows, RVM does not work, so i used the pik gem and with that i changed my environment to 3.2.6 and then it worked fine.

Trouble when attempting to launch Rails Server

Sorry if this is a bad question, I'm trying to initially set up Rails, so I don't really know what I'm doing. In the tutorial I'm following it comes to a point at which is says to run "rails server," however this is returning some unexpected results.(See below)
Macbookpro:First Cameron$ sudo rails server
Password:
=> Booting WEBrick
=> Rails 4.1.0 application starting in development on http:// 0.0.0.0:3000
=> Run `rails server -h` for more startup options
=> Notice: server is listening on all interfaces (0.0.0.0). Consider using 127.0.0.1 (--binding option)
=> Ctrl-C to shutdown server
Exiting
/Library/Ruby/Gems/2.0.0/gems/railties-4.1.0/lib/rails/railtie/configuration.rb:95:in `method_missing': undefined method `action_mailer' for #<Rails::Application::Configuration:0x007fea90b47760> (NoMethodError)
from /Users/admin/Rails/First/config/environments/development.rb:17:in `block in <top (required)>'
from /Library/Ruby/Gems/2.0.0/gems/railties-4.1.0/lib/rails/railtie.rb:210:in `instance_eval'
from /Library/Ruby/Gems/2.0.0/gems/railties-4.1.0/lib/rails/railtie.rb:210:in `configure'
from /Library/Ruby/Gems/2.0.0/gems/railties-4.1.0/lib/rails/railtie.rb:182:in `configure'
from /Users/admin/Rails/First/config/environments/development.rb:1:in `<top (required)>'
from /Library/Ruby/Gems/2.0.0/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:247:in `require'
from /Library/Ruby/Gems/2.0.0/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:247:in `block in require'
from /Library/Ruby/Gems/2.0.0/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:232:in `load_dependency'
from /Library/Ruby/Gems/2.0.0/gems/activesupport-4.1.0/lib/active_support/dependencies.rb:247:in `require'
from /Library/Ruby/Gems/2.0.0/gems/railties-4.1.0/lib/rails/engine.rb:594:in `block (2 levels) in <class:Engine>'
from /Library/Ruby/Gems/2.0.0/gems/railties-4.1.0/lib/rails/engine.rb:593:in `each'
from /Library/Ruby/Gems/2.0.0/gems/railties-4.1.0/lib/rails/engine.rb:593:in `block in <class:Engine>'
from /Library/Ruby/Gems/2.0.0/gems/railties-4.1.0/lib/rails/initializable.rb:30:in `instance_exec'
from /Library/Ruby/Gems/2.0.0/gems/railties-4.1.0/lib/rails/initializable.rb:30:in `run'
from /Library/Ruby/Gems/2.0.0/gems/railties-4.1.0/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:210:in `block (2 levels) in each_strongly_connected_component_from'
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:209:in `block in each_strongly_connected_component_from'
from /Library/Ruby/Gems/2.0.0/gems/railties-4.1.0/lib/rails/initializable.rb:44:in `each'
from /Library/Ruby/Gems/2.0.0/gems/railties-4.1.0/lib/rails/initializable.rb:44:in `tsort_each_child'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/tsort.rb:203: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 /Library/Ruby/Gems/2.0.0/gems/railties-4.1.0/lib/rails/initializable.rb:54:in `run_initializers'
from /Library/Ruby/Gems/2.0.0/gems/railties-4.1.0/lib/rails/application.rb:288:in `initialize!'
from /Library/Ruby/Gems/2.0.0/gems/railties-4.1.0/lib/rails/railtie.rb:194:in `public_send'
from /Library/Ruby/Gems/2.0.0/gems/railties-4.1.0/lib/rails/railtie.rb:194:in `method_missing'
from /Users/admin/Rails/First/config/environment.rb:5:in `<top (required)>'
from /Users/admin/Rails/First/config.ru:3:in `require'
from /Users/admin/Rails/First/config.ru:3:in `block in <main>'
from /Library/Ruby/Gems/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `instance_eval'
from /Library/Ruby/Gems/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `initialize'
from /Users/admin/Rails/First/config.ru:in `new'
from /Users/admin/Rails/First/config.ru:in `<main>'
from /Library/Ruby/Gems/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `eval'
from /Library/Ruby/Gems/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `new_from_string'
from /Library/Ruby/Gems/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:40:in `parse_file'
from /Library/Ruby/Gems/2.0.0/gems/rack-1.5.2/lib/rack/server.rb:277:in `build_app_and_options_from_config'
from /Library/Ruby/Gems/2.0.0/gems/rack-1.5.2/lib/rack/server.rb:199:in `app'
from /Library/Ruby/Gems/2.0.0/gems/railties-4.1.0/lib/rails/commands/server.rb:50:in `app'
from /Library/Ruby/Gems/2.0.0/gems/rack-1.5.2/lib/rack/server.rb:314:in `wrapped_app'
from /Library/Ruby/Gems/2.0.0/gems/railties-4.1.0/lib/rails/commands/server.rb:130:in `log_to_stdout'
from /Library/Ruby/Gems/2.0.0/gems/railties-4.1.0/lib/rails/commands/server.rb:67:in `start'
from /Library/Ruby/Gems/2.0.0/gems/railties-4.1.0/lib/rails/commands/commands_tasks.rb:81:in `block in server'
from /Library/Ruby/Gems/2.0.0/gems/railties-4.1.0/lib/rails/commands/commands_tasks.rb:76:in `tap'
from /Library/Ruby/Gems/2.0.0/gems/railties-4.1.0/lib/rails/commands/commands_tasks.rb:76:in `server'
from /Library/Ruby/Gems/2.0.0/gems/railties-4.1.0/lib/rails/commands/commands_tasks.rb:40:in `run_command!'
from /Library/Ruby/Gems/2.0.0/gems/railties-4.1.0/lib/rails/commands.rb:17:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'
Sorry if this is not needed, but I'm really unsure what to do with it.
I don't think you're alone in this error.
Make sure you coordinate your gem versions, and even better if specify the versions of your Rails & Ruby gems to avoid potential conflicts in versioning.
Posting your Gemfile would be helpful, but without seeing it, I'd say to specify your Ruby version at the top of your gemfile like:
source 'https://rubygems.org'
ruby '2.0.0'
Then specify your version of Rails. While I have had no problems with just providing:
gem 'rails'
You could be extra safe and specify a version like:
gem 'rails', '4.0.2'
Then run: bundle install for your app.
Take a look at the following tutorial. I realise that it is for windows however it solved all the initial problems I was having with my first install.
http://www.soheiokamoto.com/setting-up-ruby-on-rails-on-windows
The main point that helped me install perfectly was;
Run gem update on a fresh install to make sure everything is up to date

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