Comment old configurations and new configurations.

config/application.rb

@@ -7,18 +7,23 @@
 end
 
 module Selfstarter
-  
+
   class Application < Rails::Application
 
     # --- Standard Rails Config ---
     config.time_zone = 'Pacific Time (US & Canada)'
     config.encoding = "utf-8"
     config.filter_parameters += [:password]
-    config.active_record.whitelist_attributes = true
+
+    #DEPRECATION WARNING: Model based mass assignment security has been extracted
+    #out of Rails into a gem. Please use the new recommended protection model for
+    #params or add `protected_attributes` to your Gemfile to use the old one.
+    #config.active_record.whitelist_attributes = true
+
     # Enable the asset pipeline
     config.assets.enabled = true
     # Version of your assets, change this if you want to expire all your assets
     config.assets.version = '1.0'
     # --- Standard Rails Config ---
   end
-end
+end

config/environments/development.rb

@@ -7,7 +7,11 @@
   config.cache_classes = false
 
   # Log error messages when you accidentally call methods on nil.
-  config.whiny_nils = true
+  #config.whiny_nils = true
+  #DEPRECATION WARNING: config.whiny_nils option is deprecated and no longer works.
+
+  # Do not eager load code on boot.
+  config.eager_load = false
 
   # Show full error reports and disable caching
   config.consider_all_requests_local       = true
@@ -16,22 +20,41 @@
   # Don't care if the mailer can't send
   config.action_mailer.raise_delivery_errors = false
 
+  # 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
+
   # Print deprecation notices to the Rails logger
   config.active_support.deprecation = :log
 
+  # Raise an error on page load if there are pending migrations.
+  config.active_record.migration_error = :page_load
+
   # Only use best-standards-support built into browsers
   config.action_dispatch.best_standards_support = :builtin
 
   # Raise exception on mass assignment protection for Active Record models
-  config.active_record.mass_assignment_sanitizer = :strict
+  #config.active_record.mass_assignment_sanitizer = :strict
+  #DEPRECATION WARNING: Model based mass assignment security has been extracted
+  #out of Rails into a gem. Please use the new recommended protection model for
+  #params or add `protected_attributes` to your Gemfile to use the old one.
 
   # Log the query plan for queries taking more than this (works
   # with SQLite, MySQL, and PostgreSQL)
-  config.active_record.auto_explain_threshold_in_seconds = 0.5
+  #config.active_record.auto_explain_threshold_in_seconds = 0.5
+  #DEPRECATION WARNING: The Active Record auto explain feature has been removed.
 
   # Do not compress assets
   config.assets.compress = false
 
   # Expands the lines which load the 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
+
+  # Raises error for missing translations
+  # config.action_view.raise_on_missing_translations = true
 end

config/environments/production.rb

@@ -20,6 +20,9 @@
   # Generate digests for assets URLs
   config.assets.digest = true
 
+  #Rails 4 upgrade
+  config.eager_load = true
+  config.assets.js_compressor = :uglifier
   # Defaults to nil and saved in location specified by config.assets.prefix
   # config.assets.manifest = YOUR_PATH