updated rails from 4.1.13 to 4.2.5. This is required for rails to make use of new features in postgres 9.5

@Ralf
TODO: migration /Users/groucho/Documents/HPI/workspace/Xikolo-CodeOcean/codeocean/db/migrate/20160204111716_add_user_to_code_harbor_link.rb
is broken. A reference is made to table users which does not exist.
Workaround: run rake db:schema:load before running db:migrate. Still this should be fixed.

config/application.rb

@@ -1,13 +1,6 @@
 require File.expand_path('../boot', __FILE__)
 
-# Pick the frameworks you want:
-require "active_model/railtie"
-require "active_record/railtie"
-require "action_controller/railtie"
-require "action_mailer/railtie"
-require "action_view/railtie"
-require "sprockets/railtie"
-# require "rails/test_unit/railtie"
+require 'rails/all'
 
 # Require the gems listed in Gemfile, including any gems
 # you've limited to :test, :development, or :production.
@@ -21,17 +14,22 @@ module CodeOcean
 
     # Set Time.zone default to the specified zone and make Active Record auto-convert to this zone.
     # Run "rake -D time" for a list of tasks for finding time zone names. Default is UTC.
-    config.time_zone = 'Berlin'
+    config.time_zone = 'UTC'
 
     # The default locale is :en and all translations from config/locales/*.rb,yml are auto loaded.
     # config.i18n.load_path += Dir[Rails.root.join('my', 'locales', '*.{rb,yml}').to_s]
     # config.i18n.default_locale = :de
     config.i18n.available_locales = [:de, :en]
 
+    # Do not swallow errors in after_commit/after_rollback callbacks.
+    config.active_record.raise_in_transactional_callbacks = true
+
     config.autoload_paths << Rails.root.join('lib')
     config.eager_load_paths << Rails.root.join('lib')
     config.assets.precompile += %w( markdown-buttons.png )
 
+    config.active_record.schema_format = :sql
+
     case (RUBY_ENGINE)
       when 'ruby'
         # ...
@@ -43,5 +41,3 @@ module CodeOcean
     end
   end
 end
-
-Rails.application.config.assets.precompile += %w( markdown-buttons.png )

config/boot.rb

@@ -1,4 +1,3 @@
-# Set up gems listed in the Gemfile.
 ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile', __FILE__)
 
-require 'bundler/setup' if File.exist?(ENV['BUNDLE_GEMFILE'])
+require 'bundler/setup' # Set up gems listed in the Gemfile.

config/environments/development.rb

@@ -1,7 +1,8 @@
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
-  config.web_console.whitelisted_ips = '192.168.0.0/16'
+  config.web_console.whitelisted_ips = '192.168.0.0/16'  
+  
   # In the development environment your application's code is reloaded on
   # every request. This slows down response time but is perfect for development
   # since you don't have to restart the web server when you make code changes.
@@ -13,8 +14,8 @@ Rails.application.configure do
   # Show full error reports and disable caching.
   config.consider_all_requests_local       = true
   config.action_controller.perform_caching = false
-
-  config.action_mailer.perform_deliveries = true
+  
+  config.action_mailer.perform_deliveries = false
 
   # Don't care if the mailer can't send.
   config.action_mailer.raise_delivery_errors = false
@@ -25,12 +26,21 @@ Rails.application.configure do
   # Raise an error on page load if there are pending migrations.
   config.active_record.migration_error = :page_load
 
+  # Debug mode disables concatenation and preprocessing of assets.
+  # This option may cause significant delays in view rendering with a large
+  # number of complex assets.
+  config.assets.debug = true
+
+  # Asset digests allow you to set far-future HTTP expiration dates on all assets,
+  # yet still be able to expire them through the digest params.
+  config.assets.digest = true
+
   # Adds additional error checking when serving assets at runtime.
   # Checks for improperly declared sprockets dependencies.
   # Raises helpful error messages.
   config.assets.raise_runtime_errors = true
 
-  # Raise errors for missing translations.
+  # Raises error for missing translations
   config.action_view.raise_on_missing_translations = true
 
   BetterErrors::Middleware.allow_ip! ENV['TRUSTED_IP'] if ENV['TRUSTED_IP']

config/environments/production.rb

@@ -16,11 +16,13 @@ Rails.application.configure do
 
   # Enable Rack::Cache to put a simple HTTP cache in front of your application
   # Add `rack-cache` to your Gemfile before enabling this.
-  # For large-scale production use, consider using a caching reverse proxy like nginx, varnish or squid.
+  # For large-scale production use, consider using a caching reverse proxy like
+  # NGINX, varnish or squid.
   # config.action_dispatch.rack_cache = true
 
-  # Disable Rails's static asset server (Apache or nginx will already do this).
-  config.serve_static_assets = false
+  # Disable serving static files from the `/public` folder by default since
+  # Apache or NGINX already handles this.
+  config.serve_static_files = ENV['RAILS_SERVE_STATIC_FILES'].present?
 
   # Compress JavaScripts and CSS.
   config.assets.js_compressor = :uglifier
@@ -29,20 +31,21 @@ Rails.application.configure do
   # Do not fallback to assets pipeline if a precompiled asset is missed.
   config.assets.compile = false
 
-  # Generate digests for assets URLs.
+  # Asset digests allow you to set far-future HTTP expiration dates on all assets,
+  # yet still be able to expire them through the digest params.
   config.assets.digest = true
 
-  # Version of your assets, change this if you want to expire all your assets.
-  config.assets.version = '1.0'
+  # `config.assets.precompile` and `config.assets.version` have moved to config/initializers/assets.rb
 
   # Specifies the header that your server uses for sending files.
-  # config.action_dispatch.x_sendfile_header = "X-Sendfile" # for apache
-  # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for nginx
+  # config.action_dispatch.x_sendfile_header = 'X-Sendfile' # for Apache
+  # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for NGINX
 
   # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
   # config.force_ssl = true
 
-  # Set to :debug to see everything in the log.
+  # Use the lowest log level to ensure availability of diagnostic information
+  # when problems arise.
   config.log_level = :error
 
   # Prepend all log lines with the following tags.
@@ -55,11 +58,7 @@ Rails.application.configure do
   # config.cache_store = :mem_cache_store
 
   # Enable serving of images, stylesheets, and JavaScripts from an asset server.
-  # config.action_controller.asset_host = "http://assets.example.com"
-
-  # Precompile additional assets.
-  # application.js, application.css, and all non-JS/CSS in app/assets folder are already added.
-  # config.assets.precompile += %w( search.js )
+  # config.action_controller.asset_host = 'http://assets.example.com'
 
   # Ignore bad email addresses and do not raise email delivery errors.
   # Set this to true and configure the email server for immediate delivery to raise delivery errors.
@@ -72,9 +71,6 @@ Rails.application.configure do
   # Send deprecation notices to registered listeners.
   config.active_support.deprecation = :notify
 
-  # Disable automatic flushing of the log to improve performance.
-  # config.autoflush_log = false
-
   # Use default logging formatter so that PID and timestamp are not suppressed.
   config.log_formatter = ::Logger::Formatter.new
 

config/environments/test.rb

@@ -12,8 +12,8 @@ Rails.application.configure do
   # preloads Rails for running tests, you may have to set it to true.
   config.eager_load = false
 
-  # Configure static asset server for tests with Cache-Control for performance.
-  config.serve_static_assets  = true
+  # Configure static file server for tests with Cache-Control for performance.
+  config.serve_static_files   = true
   config.static_cache_control = 'public, max-age=3600'
 
   # Show full error reports and disable caching.
@@ -31,6 +31,9 @@ Rails.application.configure do
   # ActionMailer::Base.deliveries array.
   config.action_mailer.delivery_method = :test
 
+  # Randomize the order test cases are executed.
+  config.active_support.test_order = :random
+
   # Print deprecation notices to the stderr.
   config.active_support.deprecation = :stderr
 

config/initializers/assets.rb

@@ -0,0 +1,12 @@
+# Be sure to restart your server when you modify this file.
+
+# Version of your assets, change this if you want to expire all your assets.
+Rails.application.config.assets.version = '1.0'
+
+# Add additional assets to the asset load path
+# Rails.application.config.assets.paths << Emoji.images_path
+
+# Precompile additional assets.
+# application.js, application.css, and all non-JS/CSS in app/assets folder are already added.
+# Rails.application.config.assets.precompile += %w( search.js )
+Rails.application.config.assets.precompile += %w( markdown-buttons.png )

config/initializers/session_store.rb

@@ -1,3 +1,3 @@
 # Be sure to restart your server when you modify this file.
 
-Rails.application.config.session_store :cookie_store, key: '_hands-on-programming_session'
+Rails.application.config.session_store :cookie_store, key: '_code_ocean_session'

config/locales/en.yml

@@ -1,3 +1,24 @@
+# Files in the config/locales directory are used for internationalization
+# and are automatically loaded by Rails. If you want to use locales other
+# than English, add the necessary files in this directory.
+#
+# To use the locales, use `I18n.t`:
+#
+#     I18n.t 'hello'
+#
+# In views, this is aliased to just `t`:
+#
+#     <%= t('hello') %>
+#
+# To use a different locale, set it with `I18n.locale`:
+#
+#     I18n.locale = :es
+#
+# This would use the information in config/locales/es.yml.
+#
+# To learn more, please read the Rails Internationalization guide
+# available at http://guides.rubyonrails.org/i18n.html.
+
 en:
   activerecord:
     attributes:
@@ -466,3 +487,4 @@ en:
     previous_label: '&#8592; Previous Page'
   file_template:
     no_template_label: "Empty File"
+

config/routes.rb

@@ -3,7 +3,7 @@ FILENAME_REGEXP = /[\w\.]+/ unless Kernel.const_defined?(:FILENAME_REGEXP)
 Rails.application.routes.draw do
   resources :file_templates do
     collection do
-      get 'by_file_type/:file_type_id', as: :by_file_type, to: :by_file_type
+      get 'by_file_type/:file_type_id', as: :by_file_type, action: :by_file_type
     end
   end
   resources :code_harbor_links
@@ -42,7 +42,7 @@ Rails.application.routes.draw do
   resources :execution_environments do
     member do
       get :shell
-      post 'shell', as: :execute_command, to: :execute_command
+      post 'shell', as: :execute_command, action: :execute_command
       get :statistics
     end
 
@@ -94,14 +94,14 @@ Rails.application.routes.draw do
 
   resources :submissions, only: [:create, :index, :show] do
     member do
-      get 'download', as: :download, to: :download
-      get 'download/:filename', as: :download_file, constraints: {filename: FILENAME_REGEXP}, to: :download_file
-      get 'render/:filename', as: :render, constraints: {filename: FILENAME_REGEXP}, to: :render_file
-      get 'run/:filename', as: :run, constraints: {filename: FILENAME_REGEXP}, to: :run
+      get 'download', as: :download, action: :download
+      get 'download/:filename', as: :download_file, constraints: {filename: FILENAME_REGEXP}, action: :download_file
+      get 'render/:filename', as: :render, constraints: {filename: FILENAME_REGEXP}, action: :render_file
+      get 'run/:filename', as: :run, constraints: {filename: FILENAME_REGEXP}, action: :run
       get :score
       get :statistics
       post :stop
-      get 'test/:filename', as: :test, constraints: {filename: FILENAME_REGEXP}, to: :test
+      get 'test/:filename', as: :test, constraints: {filename: FILENAME_REGEXP}, action: :test
     end
   end