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• Storing an encrypted cookie with Rails

  - by J. Pablo Fernández

  I need to store a small piece of data (less than 10 characters) in a cookie in Rails and I need it to be secure. I don't want anybody being able to read that piece of data or injecting their own piece of data (as that would open up the app to many kinds of attacks). I think encrypting the contents of the cookie is the way to go (should I also sign it?). What is the best way to do it? Right now I'm doing this, which looks secure, but many things looked secure to people that knew much more than I about security and then it was discovered it wasn't really secure. I'm saving the secret in this way: encryptor = ActiveSupport::MessageEncryptor.new(Example::Application.config.secret_token) cookies[:secret] = { :value => encryptor.encrypt(secret), :domain => "example.com", :secure => !(Rails.env.test? || Rails.env.development?) } and then I'm reading it like this: encryptor = ActiveSupport::MessageEncryptor.new(Example::Application.config.secret_token) secret = encryptor.decrypt(cookies[:secret]) Is that secure? Any better ways of doing it? Update: I know about Rails' session and how it is secure, both by signing the cookie and by optionally storing the contents of the session server side and I do use the session for what it is for. But my question here is about storing a cookie, a piece of information I do not want in the session but I still need it to be secure.

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• Pre-done SQLs to be converted to Rails' style moduls

  - by Hoornet

  I am a Rails newbie and would really appreciate if someone converted these SQLs to complete modules for rails. I know its a lot to ask but I can't just use find_by_sql for all of them. Or can I? These are the SQLs (they run on MS-SQL): 1) SELECT STANJA_NA_DAN_POSTAVKA.STA_ID, STP_DATE, STP_TIME, STA_OPIS, STA_SIFRA, STA_POND FROM STANJA_NA_DAN_POSTAVKA INNER JOIN STANJA_NA_DAN ON(STANJA_NA_DAN.STA_ID=STANJA_NA_DAN_POSTAVKA.STA_ID) WHERE ((OSE_ID=10)AND (STANJA_NA_DAN_POSTAVKA.STP_DATE={d '2010-03-30'}) AND (STANJA_NA_DAN_POSTAVKA.STP_DATE<={d '2010-03-30'})) 2) SELECT ZIGI_OBDELANI.OSE_ID, ZIGI_OBDELANI.DOG_ID AS DOG_ID, ZIGI_OBDELANI.ZIO_DATUM AS DATUM, ZIGI_PRICETEK.ZIG_TIME_D AS ZIG_PRICETEK, ZIGI_KONEC.ZIG_TIME_D AS ZIG_KONEC FROM (ZIGI_OBDELANI INNER JOIN ZIGI ZIGI_PRICETEK ON ZIGI_OBDELANI.ZIG_ID_PRICETEK = ZIGI_PRICETEK.ZIG_ID) INNER JOIN ZIGI ZIGI_KONEC ON ZIGI_OBDELANI.ZIG_ID_KONEC = ZIGI_KONEC.ZIG_ID WHERE (ZIGI_OBDELANI.OSE_ID = 10) AND (ZIGI_OBDELANI.ZIO_DATUM = {d '2010-03-30'}) AND (ZIGI_OBDELANI.ZIO_DATUM <= {d '2010-03-30'}) AND (ZIGI_PRICETEK.ZIG_VELJAVEN < 0) AND (ZIGI_KONEC.ZIG_VELJAVEN < 0) ORDER BY ZIGI_OBDELANI.OSE_ID, ZIGI_PRICETEK.ZIG_TIME ASC 3) SELECT STA_ID, SUM(STP_TIME) AS SUM_STP_TIME, COUNT(STA_ID) FROM STANJA_NA_DAN_POSTAVKA WHERE ((STP_DATE={d '2010-03-30'}) AND (STP_DATE<={d '2010-03-30'}) AND (STA_ID=3) AND (OSE_ID=10)) GROUP BY STA_ID 4) SELECT DATUM, TDN_ID, TDN_OPIS, URN_OPIS, MOZNI_PROBLEMI, PRIHOD, ODHOD, OBVEZNOST, ZAKLJUCEVANJE_DATUM FROM OBRACUNAJ_DAN WHERE ((OSE_ID=10) AND (DATUM={d '2010-02-28'}) AND (DATUM<={d '2010-03-30'})) ORDER BY DATUM These SQLs are daily working hours and I got them as is. Also I got Database with it which (as you can see from the SQL-s) is not in Rails conventions. As a P.S.: 1)Things like STP_DATE={d '2010-03-30'}) are of course dates (in Slovenian date notation) and will be replaced with a variable (date), so that the user could choose date from and date to. 2) All of this data will be shown in the same page in the table,so maybe all in one module? Or many?; if this helps, maybe. So can someone help me? Its for my work and its my 1st project and I am a Rails newbie and the bosses are getting inpatient(they are getting quite loud actually) Thank you very very much!

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• Rails uses wrong class in belongs_to

  - by macsniper

  I have an application managing software tests and a class called TestResult: class TestResult < ActiveRecord::Base belongs_to :test_case, :class_name => "TestCase" end I'm right now migrating from Rails 1.x to 2.3.5. In Rails 1.x everything works fine. When trying to access the association in Rails 2.3.5, I get the following error: NoMethodError: undefined method 'find' for ActiveRecord::TestCase:Class from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/associations/belongs_to_association.rb:49:in 'send' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/associations/belongs_to_association.rb:49:in 'find_target' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/associations/association_proxy.rb:239:in 'load_target' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/associations/association_proxy.rb:112:in 'reload' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/associations.rb:1250:in 'test_case' My Question is: how can I tell Rails to use my TestCase-class instead of ActiveRecord::TestCase. TestCase class: class TestCase < ActiveRecord::Base set_table_name "test_case" has_many :test_results belongs_to :component, :foreign_key => "subsystem_id" belongs_to :domain, :foreign_key => "area_id" belongs_to :use_case, :foreign_key => "use_case_id" end

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• Rails using plural table names even though I told it to use singular

  - by Jason Swett

  I tried to run rake test:profile and I got this error: ... Table 'mcif2.accounts' doesn't exist: DELETE FROM `accounts` I know accounts doesn't exist. It's called account. I know Rails uses plural table names by default but here's what my config/environment.rb looks like: # Load the rails application require File.expand_path('../application', __FILE__) # Initialize the rails application McifRails::Application.initialize! ActiveRecord::Base.pluralize_table_names = false And here's what db/schema.rb looks like: ActiveRecord::Schema.define(:version => 0) do create_table "account", :force => true do |t| t.integer "customer_id", :limit => 8, :null => false t.string "account_number", :null => false t.integer "account_type_id", :limit => 8 t.date "open_date", :null => false So I don't understand why Rails still wants to call it accounts sometimes. Any ideas? If it helps give any clues at all, here are the results of grep -ir 'accounts' *.

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• Rails Passenger Nginx cannot load such file -- bundler

  - by Stuart

  I have set up Rails, Passenger, nginx, and PostgreSQL on Ubuntu Server 12.04LTS. Upon trying to access the application/website, however, I am greeted with an error page saying that the application could not be started because a source file is missing. Error message: cannot load such file -- bundler. My nginx config (/opt/nginx/conf/nginx.conf): user railsapp; worker_processes 1; events { worker_connections 1024; } http { include mime.types; default_type application/octet-stream; sendfile on; keepalive_timeout 65; passenger_root /home/railsapp/.rvm/gems/ruby-1.9.3-p194/gems/passenger-3.0.14; passenger_ruby /home/railsapp/.rvm/rubies/ruby-1.9.3-p194/bin/ruby; server { listen 80; server_name fitness_schedules.local; root /home/railsapp/fitness_schedules/public; passenger_enabled on; rack_env development; } } Here is the error message: A source file that the application requires, is missing. It is possible that you didn't upload your application files correctly. Please check whether all your application files are uploaded. A required library may not installed. Please install all libraries that this application requires. Further information about the error may have been written to the application's log file. Please check it in order to analyse the problem. Error message: cannot load such file -- bundler Exception class: LoadError Application root: /home/railsapp/fitness_schedules Here is the backtrace from the webpage that is presented by nginx: Backtrace: # File Line Location 0 /home/railsapp/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb 36 in `require' 1 /home/railsapp/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb 36 in `require' 2 /home/railsapp/.rvm/gems/ruby-1.9.3-p194/gems/passenger-3.0.14/lib/phusion_passenger/utils.rb 325 in `prepare_app_process' 3 /home/railsapp/.rvm/gems/ruby-1.9.3-p194/gems/passenger-3.0.14/lib/phusion_passenger/rack/application_spawner.rb 156 in `block in initialize_server' 4 /home/railsapp/.rvm/gems/ruby-1.9.3-p194/gems/passenger-3.0.14/lib/phusion_passenger/utils.rb 563 in `report_app_init_status' 5 /home/railsapp/.rvm/gems/ruby-1.9.3-p194/gems/passenger-3.0.14/lib/phusion_passenger/rack/application_spawner.rb 154 in `initialize_server' 6 /home/railsapp/.rvm/gems/ruby-1.9.3-p194/gems/passenger-3.0.14/lib/phusion_passenger/abstract_server.rb 204 in `start_synchronously' 7 /home/railsapp/.rvm/gems/ruby-1.9.3-p194/gems/passenger-3.0.14/lib/phusion_passenger/abstract_server.rb 180 in `start' 8 /home/railsapp/.rvm/gems/ruby-1.9.3-p194/gems/passenger-3.0.14/lib/phusion_passenger/rack/application_spawner.rb 129 in `start' 9 /home/railsapp/.rvm/gems/ruby-1.9.3-p194/gems/passenger-3.0.14/lib/phusion_passenger/spawn_manager.rb 253 in `block (2 levels) in spawn_rack_application' 10 /home/railsapp/.rvm/gems/ruby-1.9.3-p194/gems/passenger-3.0.14/lib/phusion_passenger/abstract_server_collection.rb 132 in `lookup_or_add' 11 /home/railsapp/.rvm/gems/ruby-1.9.3-p194/gems/passenger-3.0.14/lib/phusion_passenger/spawn_manager.rb 246 in `block in spawn_rack_application' 12 /home/railsapp/.rvm/gems/ruby-1.9.3-p194/gems/passenger-3.0.14/lib/phusion_passenger/abstract_server_collection.rb 82 in `block in synchronize' 13 prelude> 10:in `synchronize' 14 /home/railsapp/.rvm/gems/ruby-1.9.3-p194/gems/passenger-3.0.14/lib/phusion_passenger/abstract_server_collection.rb 79 in `synchronize' 15 /home/railsapp/.rvm/gems/ruby-1.9.3-p194/gems/passenger-3.0.14/lib/phusion_passenger/spawn_manager.rb 244 in `spawn_rack_application' 16 /home/railsapp/.rvm/gems/ruby-1.9.3-p194/gems/passenger-3.0.14/lib/phusion_passenger/spawn_manager.rb 137 in `spawn_application' 17 /home/railsapp/.rvm/gems/ruby-1.9.3-p194/gems/passenger-3.0.14/lib/phusion_passenger/spawn_manager.rb 275 in `handle_spawn_application' 18 /home/railsapp/.rvm/gems/ruby-1.9.3-p194/gems/passenger-3.0.14/lib/phusion_passenger/abstract_server.rb 357 in `server_main_loop' 19 /home/railsapp/.rvm/gems/ruby-1.9.3-p194/gems/passenger-3.0.14/lib/phusion_passenger/abstract_server.rb 206 in `start_synchronously' 20 /home/railsapp/.rvm/gems/ruby-1.9.3-p194/gems/passenger-3.0.14/helper-scripts/passenger-spawn-server 99 in `' In ~/fitness_schedules/log there are only development and test logs, no production/development logs.

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• A feeling that I'm not that good developer

  - by Karim

  Hi, Im having a strange feeling, but let me first introduce myself as a software developer. I started to program when I was still a kid, I had about 10 or 11 years. I really enjoy my work and never get bored from it. It's amazing how somebody could be paid for what he really likes to do and would be doing it anyway even for free. WHen I first started to program, I was feeling proud of what I was doing, each application I built was for me a success and after 2-3 year I had a feeling that I'm a coding guru. It was a nice feeling ;-) But the more I was in the field, the more types of software I started to develop I was starting to have a feeling that I'm completely wrong in that I'm guru. I felt that I'm not even a mediocre developer. Each new field I start to work on is giving me this feeling. Like when I once developed a device driver for a client, I saw how much I need to learn about device drivers. When I developed a video filter for an application, I saw how much do I still need to learn about DirectShow, Color Spaces, and all the theory behind that. The worst thing was when I started to learn algorithms. It was several years ago. I knew then the basic structures and algorithms like the sorting, some types of trees, some hashtables, strings etc.. and when I really wanted to learn a group of structures I learned about 5-6 new types and saw that in fact even this small group has several hundred subtypes of structures. It's depressing how little time people have in their lives to learn all this stuff. I'm now a software developer with about 10 years of experience and I still feel that I'm not a proficient developer when I think about things that others do in the industry. Is this normal what I'm experiencing or is it a sign of a destructive excessive ambition? Thanks in advance for any comments.

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• using munin-plugins-rails to monitor rails app perfromance

  - by user2099762

  I have been trying to configure munin-plugins-rails to monitor the performance of our rails apps from Munin. The graphs appear, but no data is shown in the graphs. The log files show Error output from : 2013/06/27-15:39:06 [5540] Request-log-analyzer, by Willem van Bergen and $ 2013/06/27-15:39:06 [5540] Website: http://railsdoctors.com I have tried running Request-log-analyzer manually and pointing it at the production log file, and this reports as % for every item. There is data in the log file. I have tried changing the version of the gems installed, and also the type of the log file, but no luck. Any ideas anyone? Thanks

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• No route matches [GET] "/user/sign_out"

  - by user3399101

  So, I'm getting the below error when clicking on Sign Out on my drop down menu on the nav: No route matches [GET] "/user/sign_out" However, this only happens when using the sign out on the drop down nav (the hamburger menu for mobile devices) and not when clicking the sign out on the regular nav. See the code below: <div class="container demo-5"> <div class="main clearfix"> <div class="column"> <div id="dl-menu" class="dl-menuwrapper"> <button class="dl-trigger">Open Menu</button> <ul class="dl-menu dl-menu-toggle"> <div id="closebtn" onclick="closebtn()"></div> <% if user_signed_in? %> <li><%= link_to 'FAQ', faq_path %></li> <li><a href="#">Contact Us</a></li> <li><%= link_to 'My Account', account_path %></li> <li><%= link_to 'Sign Out', destroy_user_session_path, method: 'delete' %></li> <--- this is the line <% else %> <li><%= link_to 'FAQ', faq_path %></li> <li><a href="#">Contact Us</a></li> <li><%= link_to 'Sign In', new_user_session_path %></li> <li><%= link_to 'Free Trial', plans_path %></li> <% end %> </ul> </div><!-- /dl-menuwrapper --> </div> </div> </div><!-- /container --> </div> And this is the non-drop down code that works: <div class="signincontainer pull-right"> <div class="navbar-form navbar-right"> <% if user_signed_in? %> <%= link_to 'Sign out', destroy_user_session_path, class: 'btn signin-button', method: :delete %> <div class="btn signin-button usernamefont"><%= link_to current_user.full_name, account_path %></div> <% else %> ....rest of code here Updated error: ActionController::RoutingError (No route matches [GET] "/user/sign_out"): actionpack (4.0.4) lib/action_dispatch/middleware/debug_exceptions.rb:21:in `call' actionpack (4.0.4) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call' railties (4.0.4) lib/rails/rack/logger.rb:38:in `call_app' railties (4.0.4) lib/rails/rack/logger.rb:20:in `block in call' activesupport (4.0.4) lib/active_support/tagged_logging.rb:68:in `block in tagged' activesupport (4.0.4) lib/active_support/tagged_logging.rb:26:in `tagged' activesupport (4.0.4) lib/active_support/tagged_logging.rb:68:in `tagged' railties (4.0.4) lib/rails/rack/logger.rb:20:in `call' quiet_assets (1.0.2) lib/quiet_assets.rb:18:in `call_with_quiet_assets' actionpack (4.0.4) lib/action_dispatch/middleware/request_id.rb:21:in `call' rack (1.5.2) lib/rack/methodoverride.rb:21:in `call' rack (1.5.2) lib/rack/ru

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• is good for one year experince Java Developer to do VB.NET development?

  - by tanghao

  I'm a java programmer with around one and half years experience. Recently my boss wants me to develop an excel add-in with VB.NET in next a few months or maybe I have to be fully in charge of this add-in in the further. It makes me quite nervous right now because I am really not sure what this VB.NET development experience could mean to me in the further as I am not so sure if it's good to diverse my experience in current stage. Any one could give some helps and suggestions?

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• Snow Leopard & Ruby on Rails - SQLite3 issue

  - by spin-docta

  I just upgraded to snow leopard. Before, I had everything running fine, but now when I start the server from the terminal I get: => Booting WEBrick => Rails 2.3.3 application starting on http://0.0.0.0:3000 => Call with -d to detach => Ctrl-C to shutdown server [2009-08-28 23:18:19] INFO WEBrick 1.3.1 [2009-08-28 23:18:19] INFO ruby 1.8.7 (2008-08-11) [universal-darwin10.0] [2009-08-28 23:18:19] INFO WEBrick::HTTPServer#start: pid=845 port=3000 Then when I got to generated page, it seems like it isn't working with sqlite3. How do I fix? Here's what the server prints out when I go to a scripted view page: /!\ FAILSAFE /!\ Fri Aug 28 23:18:34 -0400 2009 Status: 500 Internal Server Error uninitialized constant SQLite3::Driver::Native::Driver::API /Library/Ruby/Gems/1.8/gems/activesupport-2.3.3/lib/active_support/dependencies.rb:105:in `const_missing' /Library/Ruby/Gems/1.8/gems/sqlite3-ruby-1.2.5/lib/sqlite3/driver/native/driver.rb:76:in `open' /Library/Ruby/Gems/1.8/gems/sqlite3-ruby-1.2.5/lib/sqlite3/database.rb:76:in `initialize' /Library/Ruby/Gems/1.8/gems/activerecord-2.3.3/lib/active_record/connection_adapters/sqlite3_adapter.rb:13:in `new' /Library/Ruby/Gems/1.8/gems/activerecord-2.3.3/lib/active_record/connection_adapters/sqlite3_adapter.rb:13:in `sqlite3_connection' /Library/Ruby/Gems/1.8/gems/activerecord-2.3.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:223:in `send' /Library/Ruby/Gems/1.8/gems/activerecord-2.3.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:223:in `new_connection' /Library/Ruby/Gems/1.8/gems/activerecord-2.3.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:245:in `checkout_new_connection' /Library/Ruby/Gems/1.8/gems/activerecord-2.3.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:188:in `checkout' /Library/Ruby/Gems/1.8/gems/activerecord-2.3.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:184:in `loop' /Library/Ruby/Gems/1.8/gems/activerecord-2.3.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:184:in `checkout' /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize' /Library/Ruby/Gems/1.8/gems/activerecord-2.3.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:183:in `checkout' /Library/Ruby/Gems/1.8/gems/activerecord-2.3.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:98:in `connection' /Library/Ruby/Gems/1.8/gems/activerecord-2.3.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:326:in `retrieve_connection' /Library/Ruby/Gems/1.8/gems/activerecord-2.3.3/lib/active_record/connection_adapters/abstract/connection_specification.rb:123:in `retrieve_connection' /Library/Ruby/Gems/1.8/gems/activerecord-2.3.3/lib/active_record/connection_adapters/abstract/connection_specification.rb:115:in `connection' /Library/Ruby/Gems/1.8/gems/activerecord-2.3.3/lib/active_record/query_cache.rb:9:in `cache' /Library/Ruby/Gems/1.8/gems/activerecord-2.3.3/lib/active_record/query_cache.rb:28:in `call' /Library/Ruby/Gems/1.8/gems/activerecord-2.3.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:361:in `call' /Library/Ruby/Gems/1.8/gems/rack-1.0.0/lib/rack/head.rb:9:in `call' /Library/Ruby/Gems/1.8/gems/rack-1.0.0/lib/rack/methodoverride.rb:24:in `call' /Library/Ruby/Gems/1.8/gems/actionpack-2.3.3/lib/action_controller/params_parser.rb:15:in `call' /Library/Ruby/Gems/1.8/gems/actionpack-2.3.3/lib/action_controller/session/cookie_store.rb:93:in `call' /Library/Ruby/Gems/1.8/gems/actionpack-2.3.3/lib/action_controller/reloader.rb:29:in `call' /Library/Ruby/Gems/1.8/gems/actionpack-2.3.3/lib/action_controller/failsafe.rb:26:in `call' /Library/Ruby/Gems/1.8/gems/rack-1.0.0/lib/rack/lock.rb:11:in `call' /Library/Ruby/Gems/1.8/gems/rack-1.0.0/lib/rack/lock.rb:11:in `synchronize' /Library/Ruby/Gems/1.8/gems/rack-1.0.0/lib/rack/lock.rb:11:in `call' /Library/Ruby/Gems/1.8/gems/actionpack-2.3.3/lib/action_controller/dispatcher.rb:106:in `call' /Library/Ruby/Gems/1.8/gems/rails-2.3.3/lib/rails/rack/static.rb:31:in `call' /Library/Ruby/Gems/1.8/gems/rack-1.0.0/lib/rack/urlmap.rb:46:in `call' /Library/Ruby/Gems/1.8/gems/rack-1.0.0/lib/rack/urlmap.rb:40:in `each' /Library/Ruby/Gems/1.8/gems/rack-1.0.0/lib/rack/urlmap.rb:40:in `call' /Library/Ruby/Gems/1.8/gems/rails-2.3.3/lib/rails/rack/log_tailer.rb:17:in `call' /Library/Ruby/Gems/1.8/gems/rack-1.0.0/lib/rack/content_length.rb:13:in `call' /Library/Ruby/Gems/1.8/gems/rack-1.0.0/lib/rack/handler/webrick.rb:46:in `service' /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/httpserver.rb:104:in `service' /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/httpserver.rb:65:in `run' /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/server.rb:173:in `start_thread' /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/server.rb:162:in `start' /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/server.rb:162:in `start_thread' /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/server.rb:95:in `start' /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/server.rb:92:in `each' /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/server.rb:92:in `start' /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/server.rb:23:in `start' /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/webrick/server.rb:82:in `start' /Library/Ruby/Gems/1.8/gems/rack-1.0.0/lib/rack/handler/webrick.rb:13:in `run' /Library/Ruby/Gems/1.8/gems/rails-2.3.3/lib/commands/server.rb:111 /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `gem_original_require' /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require' script/server:3

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• Rails Resque workers fail with PGError: server closed the connection unexpectedly

  - by gc

  I have site running rails application and resque workers running in production mode, on Ubuntu 9.10, Rails 2.3.4, ruby-ee 2010.01, PostgreSQL 8.4.2 Workers constantly raised errors: PGError: server closed the connection unexpectedly. My best guess is that master resque process establishes connection to db (e.g. authlogic does that when use User.acts_as_authentic), while loading rails app classes, and that connection becomes corrupted in fork()ed process (on exit?), so next forked children get kind of broken global ActiveRecord::Base.connection I could reproduce very similar behaviour with this sample code imitating fork/processing in resque worker. (AFAIK, users of libpq recommended to recreate connections in forked process anyway, otherwise it's not safe ) But, the odd thing is that when I use pgbouncer or pgpool-II instead of direct pgsql connection, such errors do not appear. So, the question is where and how should I dig to find out why it is broken for plain connection and is working with connection pools? Or reasonable workaround?

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• Rails3 and Paperclip

  - by arkannia

  Hi, I have migrated my application from rails 2.3 to rails3 and i have a problem with paperclip. I saw there was a branch for rails3 on paperclip git. So I added "gem 'paperclip', :git = 'git://github.com/thoughtbot/paperclip.git', :branch = 'rails3'" into the Gemfile and launch the command bundle install. Once paperclip installed, the upload worked fine but not the styles. I saw a hack to fix it. # in lib/paperclip/attachment.rb at line 293 def callback which #:nodoc: # replace this line... # instance.run_callbacks(which, @queued_for_write){|result,obj| result == false } # with this: instance.run_callbacks(which, @queued_for_write) end The styles are ok after that, but i'm not able to active the processor. My code is : has_attached_file :image, :default_url => "/images/nopicture.jpg", :styles => { :large => "800x600>", :cropped => Proc.new { |instance| "#{instance.width}x#{instance.height}>" }, :crop => "300x300>" }, :processors => [:cropper] My processor is located in RAILS_APP/lib/paperclip_processors/cropper.rb and contains : module Paperclip class Cropper < Thumbnail def transformation_command if crop_command and !skip_crop? crop_command + super.sub(/ -crop \S+/, '') else super end end def crop_command target = @attachment.instance trans = ""; trans << " -crop #{target.crop_w}x#{target.crop_h}+#{target.crop_x}+#{target.crop_y}" if target.cropping? trans << " -resize \"#{target.width}x#{target.height}\"" trans end def skip_crop? ["800x600>", "300x300>"].include?(@target_geometry.to_s) end end end My problem is that i got this error message : uninitialized constant Paperclip::Cropper The cropped processor is not loaded. Is anybody has an idea to fix that ? For information my application works fine on rails 2.3.4.

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• Memcached broken pipe in rails

  - by abronte

  I seem to run into some random broken pipe errors if I try to access memcached a specific way. When I try to access memcached via Rails.cache, the first one or two reads/writes will result in a "MemCacheError (Broken pipe): Broken pipe" and return nil. But if I access memcached through a new object (ActiveSupport::Cache::MemCacheStore.new) I don't get the broken pipe error at all. I've tried upgrading to memcached 1.4.4 (was previously using 1.2.2) and I still got the error. I'm using rails 2.3.5. I would prefer to access memcached through Rails.cache because I takes namespaces into account. Any ideas?

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• Start or ensure that Delayed Job runs when an application/server restarts.

  - by btelles

  Hi there, We have to use delayed_job (or some other background-job processor) to run jobs in the background, but we're not allowed to change the boot scripts/boot-levels on the server. This means that the daemon is not guaranteed to remain available if the provider restarts the server (since the daemon would have been started by a capistrano recipe that is only run once per deployment). Currently, the best way I can think of to ensure the delayed_job daemon is always running, is to add an initializer to our Rails application that checks if the daemon is running. If it's not running, then the initializer starts the daemon, otherwise, it just leaves it be. The question, therefore, is how do we detect that the Delayed_Job daemon is running from inside a script? (We should be able to start up a daemon fairly easily, bit I don't know how to detect if one is already active). Anyone have any ideas? Regards, Bernie Based on the answer below, this is what I came up with. Just put it in config/initializers and you're all set: #config/initializers/delayed_job.rb DELAYED_JOB_PID_PATH = "#{Rails.root}/tmp/pids/delayed_job.pid" def start_delayed_job Thread.new do `ruby script/delayed_job start` end end def process_is_dead? begin pid = File.read(DELAYED_JOB_PID_PATH).strip Process.kill(0, pid.to_i) false rescue true end end if !File.exist?(DELAYED_JOB_PID_PATH) && process_is_dead? start_delayed_job end

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• Call named routes in CakePHP as the same way in Ruby on Rails

  - by Lucas Renan

  How can I call a route (in the view) in CakePHP as the same way in Rails? Ruby on Rails routes.rb map.my_route '/my-route', :controller => 'my_controller', :action => 'index' view link_to 'My Route Name', my_route_path CakePHP routes.php Router::connect('/my-route', array('controller' => 'my_controller', 'action' => 'index')); view $html->link('My Route Name', '/my-route'); But I think the Rails way is better, because I can make changes in the "url" and I don't need changes the code of the views.

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• rspec, autotest and Rails 3 beta 2 can't find executable issue

  - by Toby Hede

  I am running Rails 3 Beta2 and attempting to get Autotest working with rspec. When I run autospec, I receive the following message: /usr/local/lib/ruby/site_ruby/1.8/rubygems.rb:334:in `bin_path': can't find executable autospec for rspec-2.0.0.beta.5 (Gem::Exception) from /usr/local/bin/autospec:19 I am using Ruby 1.9.1 with the following Gems: rails (3.0.0.beta2) railties (3.0.0.beta2) rspec (2.0.0.beta.5) rspec-core (2.0.0.beta.5) rspec-expectations (2.0.0.beta.5) rspec-mocks (2.0.0.beta.5) rspec-rails (2.0.0.beta.5) ZenTest (4.3.1) Any help would be greatly appreciated.

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• _mask and Rails

  - by Eric Koslow

  So I am trying to get the cancan gem to work with my rails 3 app and I've hit a problem. I tried to copy the code that Ryan Bates (the creator of the gem) used in his screen cast, but I get an error saying that roles_mask is not a method. I figure that the _mask method was removed from Ruby/Rails at some point, and I'm now wondering what is the replacement. Here's the code in my user.rb model: named_scope :with_role, lambda { |role| {:conditions => "roles_mask & #{2**ROLES.index(role.to_s)} > 0 "} } ROLES = %w[admin student principal admissions] def roles=(roles) self.roles_mask = (roles & ROLES).map { |r| 2**ROLES.index(r) }.sum end def roles ROLES.reject { |r| ((roles_mask || 0) & 2**ROLES.index(r)).zero? } end def role? roles.include? role.to_s end def role_symbols roles.map(&:to_sym) end I'm using Rails 3 and Ruby 1.9.2dev Thank you

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• Ruby on Rails can't find 'label'

  - by msandbot

  Hi trying to make a Registration page with Ruby on rails using the tutorial found here http://rails.francik.name/week4.html having trouble getting the page to work after adding <h1>Register</h1> <enter code here%= error_messages_for :user %> <% form_for :user do |f| %> <p> <%= f.label :screen_name %>: <%= f.text_field :screen_name %> </p> <p> <%= f.label :e_mail, "E-Mail" %>: <%= f.text_field :e_mail %> </p> <p> <%= f.label :password %>: <%= f.password_field :password %> </p> <p> <%= f.submit "Register" %> </p> <% end %> to the register.rhtml file when loaded I get NoMethodError in User#register Showing app/views/user/register.rhtml where line #5 raised: undefined method `label' for #<ActionView::Helpers::FormBuilder:0x275ef48> the application trace is #{RAILS_ROOT}/app/views/user/register.rhtml:5:in `_run_rhtml_47app47views47user47register46rhtml' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_view/helpers/form_helper.rb:151:in `fields_for' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_view/helpers/form_helper.rb:127:in `form_for' #{RAILS_ROOT}/app/views/user/register.rhtml:3:in `_run_rhtml_47app47views47user47register46rhtml' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_view/base.rb:326:in `send' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_view/base.rb:326:in `compile_and_render_template' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_view/base.rb:301:in `render_template' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_view/base.rb:260:in `render_file' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:806:in `render_file' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:711:in `render_with_no_layout' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/layout.rb:247:in `render_without_benchmark' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/benchmarking.rb:50:in `render' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/1.8/benchmark.rb:293:in `measure' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/benchmarking.rb:50:in `render' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:1096:in `perform_action_without_filters' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:632:in `call_filter' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:619:in `perform_action_without_benchmark' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/benchmarking.rb:66:in `perform_action_without_rescue' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/1.8/benchmark.rb:293:in `measure' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/benchmarking.rb:66:in `perform_action_without_rescue' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/rescue.rb:83:in `perform_action' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:430:in `send' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:430:in `process_without_filters' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:624:in `process_without_session_management_support' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/session_management.rb:114:in `process' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:330:in `process' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/dispatcher.rb:41:in `dispatch' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/rails.rb:78:in `process' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/rails.rb:76:in `synchronize' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/rails.rb:76:in `process' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:618:in `process_client' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:617:in `each' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:617:in `process_client' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:736:in `run' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:736:in `initialize' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:736:in `new' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:736:in `run' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:720:in `initialize' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:720:in `new' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel.rb:720:in `run' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/configurator.rb:271:in `run' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/configurator.rb:270:in `each' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/configurator.rb:270:in `run' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/mongrel-1.0.1/bin/mongrel_rails:127:in `run' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/mongrel-1.0.1/lib/mongrel/command.rb:211:in `run' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/lib/ruby/gems/1.8/gems/mongrel-1.0.1/bin/mongrel_rails:243 /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/bin/mongrel_rails:16:in `load' /Applications/Locomotive2/Bundles/standardRailsMar2007.locobundle/i386/bin/mongrel_rails:16

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• Rails 2.3.5 model name translation problem in error messages

  - by Jason Nerer

  Hi Rails'ers, I encountered some problem while trying to translate my model's names and attributes in a Rails 2.3.5 app. I have the following model: class BillingPlan < ActiveRecord::Base validates_presence_of :billing_option_id belongs_to :order belongs_to :user belongs_to :billing_option end When validation fails, my models attributes are translated correctly, but the modelname itself is not. I use the following translation skeleton in de.yml de: activerecord: models: shipping_plan: "Versandart" billing_plan: "Rechnungsart" attributes: shipping_plan: shipping_option_id: "Versandoption" billing_plan: billing_option_id: "Rechnungsoption" Basis for my translation file is: http://github.com/svenfuchs/rails-i18n/blob/master/rails/locale/de.yml Can anyone help? Thx in advance J.

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• Ruby (Rack) application could not be started - Passenger (3.0.9) error for rails 3.1.0 app on ubuntu and nginx (1.0.6) after deploying

  - by user938363

  Here is the error saying bcrypt was not loaded. The rails app is not using the Devise for authentication and gem bcrypt is not in Gemfile. Sometime, the webserver throws out the error saying spawn server can not start. gem list shows that both bcrypt-ruby 3.0.1 and 3.0.0 were installed. Ruby (Rack) application could not be started A source file that the application requires, is missing. * It is possible that you didn't upload your application files correctly. Please check whether all your application files are uploaded. * A required library may not installed. Please install all libraries that this application requires. Further information about the error may have been written to the application's log file. Please check it in order to analyse the problem. Error message: no such file to load -- bcrypt Exception class: LoadError Application root: /vol/www/emclab/current Backtrace: # File Line Location 0 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/activesupport-3.1.0/lib/active_support/dependencies.rb 240 in `require' 1 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/activesupport-3.1.0/lib/active_support/dependencies.rb 240 in `block in require' 2 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/activesupport-3.1.0/lib/active_support/dependencies.rb 225 in `load_dependency' 3 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/activesupport-3.1.0/lib/active_support/dependencies.rb 240 in `require' 4 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/activemodel-3.1.0/lib/active_model/secure_password.rb 1 in `' 5 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/base.rb 2160 in `block in ' 6 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/base.rb 2140 in `class_eval' 7 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/base.rb 2140 in `' 8 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/base.rb 31 in `' 9 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/session_store.rb 77 in `' 10 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/session_store.rb 51 in `' 11 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/activerecord-3.1.0/lib/active_record/session_store.rb 1 in `' 12 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/railties-3.1.0/lib/rails/application/configuration.rb 123 in `session_store' 13 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/railties-3.1.0/lib/rails/application.rb 168 in `block in default_middleware_stack' 14 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/railties-3.1.0/lib/rails/application.rb 142 in `tap' 15 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/railties-3.1.0/lib/rails/application.rb 142 in `default_middleware_stack' 16 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/railties-3.1.0/lib/rails/engine.rb 445 in `app' 17 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/railties-3.1.0/lib/rails/application/finisher.rb 37 in `block in ' 18 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/railties-3.1.0/lib/rails/initializable.rb 25 in `instance_exec' 19 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/railties-3.1.0/lib/rails/initializable.rb 25 in `run' 20 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/railties-3.1.0/lib/rails/initializable.rb 50 in `block in run_initializers' 21 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/railties-3.1.0/lib/rails/initializable.rb 49 in `each' 22 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/railties-3.1.0/lib/rails/initializable.rb 49 in `run_initializers' 23 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/railties-3.1.0/lib/rails/application.rb 92 in `initialize!' 24 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/railties-3.1.0/lib/rails/railtie/configurable.rb 30 in `method_missing' 25 /vol/www/emclab/releases/20111115184804/config/environment.rb 5 in `' 26 config.ru 3 in `require' 27 config.ru 3 in `block in ' 28 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/rack-1.3.2/lib/rack/builder.rb 51 in `instance_eval' 29 /vol/www/emclab/shared/bundle/ruby/1.9.1/gems/rack-1.3.2/lib/rack/builder.rb 51 in `initialize' 30 config.ru 1 in `new' 31 config.ru 1 in `' 32 /home/dtt/.rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/rack/application_spawner.rb 222 in `eval' 33 /home/dtt/.rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/rack/application_spawner.rb 222 in `load_rack_app' 34 /home/dtt/.rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/rack/application_spawner.rb 156 in `block in initialize_server' 35 /home/dtt/.rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/utils.rb 572 in `report_app_init_status' 36 /home/dtt/.rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/rack/application_spawner.rb 153 in `initialize_server' 37 /home/dtt/.rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server.rb 204 in `start_synchronously' 38 /home/dtt/.rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server.rb 180 in `start' 39 /home/dtt/.rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/rack/application_spawner.rb 128 in `start' 40 /home/dtt/.rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/spawn_manager.rb 253 in `block (2 levels) in spawn_rack_application' 41 /home/dtt/.rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server_collection.rb 132 in `lookup_or_add' 42 /home/dtt/.rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/spawn_manager.rb 246 in `block in spawn_rack_application' 43 /home/dtt/.rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server_collection.rb 82 in `block in synchronize' 44 prelude> 10:in `synchronize' 45 /home/dtt/.rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server_collection.rb 79 in `synchronize' 46 /home/dtt/.rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/spawn_manager.rb 244 in `spawn_rack_application' 47 /home/dtt/.rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/spawn_manager.rb 137 in `spawn_application' 48 /home/dtt/.rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/spawn_manager.rb 275 in `handle_spawn_application' 49 /home/dtt/.rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server.rb 357 in `server_main_loop' 50 /home/dtt/.rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server.rb 206 in `start_synchronously' 51 /home/dtt/.rvm/gems/ruby-1.9.2-p290/gems/passenger-3.0.9/helper-scripts/passenger-spawn-server 99 in `' cap deploy:check returns: You appear to have all necessary dependencies installed Any thoughts about the problem? thanks!

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• Rails: periodically use HEAD to check for page changes

  - by Chris

  I have a Rails app implementing a game, so it's expected that a player will leave a browser open at the game page. When player Alan takes an action himself, I use AJAX requests to update the game page Alan is viewing to reflect the new state. However, when another player (Bob) takes an action, I don't have (or want) a mechanism to push the change to Alan's view. I would like Alan's page to periodically poll the Rails server to find if there have been any changes since last reload, and to reload the page (either via a whole-page GET or an AJAX call) if not. In order to play nicely with caches and proxies, I'd like to do this by issuing a periodic HTTP HEAD request, get Rails to work out the timestamp of the last change (trivially available from my DB) and respond with that in the Last-Modified header; then have the client-side act on that timestamp. How can I go about doing this?

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• ruby on rails language problem "invalid byte sequence in GBK"

  - by user357203

  This is definitely a language issue, both of our code and our database contains Chinese characters. **This is my environment: About your application's environment Ruby version 1.9.1 (i386-mingw32) RubyGems version 1.3.5 Rack version 1.0 Rails version 2.3.5 Active Record version 2.3.5 Active Resource version 2.3.5 Action Mailer version 2.3.5 Active Support version 2.3.5 Application root C:/path_to_my_root Environment development Database adapter mysql Database schema version 20100327010640 **This is my localhost;3000 after running my ruby server: ArgumentError in HomeController#construction invalid byte sequence in GBK RAILS_ROOT: C:/path_to_my_root Application Trace | Framework Trace | Full Trace C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_view/ template_error.rb:43:in `split' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_view/ template_error.rb:43:in `source_extract' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_view/ template_error.rb:86:in `compute_backtrace' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_view/ template_error.rb:11:in `initialize' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_view/ template.rb:212:in `new' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_view/ template.rb:212:in `rescue in render_template' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_view/ template.rb:205:in `render_template' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_view/ base.rb:265:in `render' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_view/ base.rb:352:in `_render_with_layout' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/action_view/ base.rb:262:in `render' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/base.rb:1250:in `render_for_file' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/base.rb:951:in `render' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/benchmarking.rb:51:in `block in render_with_benchmark' C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/ active_support/core_ext/benchmark.rb:17:in `block in ms' C:/Ruby19/lib/ruby/1.9.1/benchmark.rb:309:in `realtime' C:/Ruby19/lib/ruby/gems/1.9.1/gems/activesupport-2.3.5/lib/ active_support/core_ext/benchmark.rb:17:in `ms' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/benchmarking.rb:51:in `render_with_benchmark' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/mime_responds.rb:135:in `block in custom' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/mime_responds.rb:179:in `call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/mime_responds.rb:179:in `block in respond' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/mime_responds.rb:173:in `each' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/mime_responds.rb:173:in `respond' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/mime_responds.rb:107:in `respond_to' C:/Users/Howard/Documents/local/vjoin/app/controllers/ home_controller.rb:53:in `construction' ..... C:/Ruby19/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/ methodoverride.rb:24:in `call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/params_parser.rb:15:in `call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/session/cookie_store.rb:93:in `call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/failsafe.rb:26:in `call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/lock.rb:11:in `block in call' :8:in `synchronize' C:/Ruby19/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/lock.rb:11:in `call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/dispatcher.rb:114:in `block in call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/reloader.rb:34:in `run' C:/Ruby19/lib/ruby/gems/1.9.1/gems/actionpack-2.3.5/lib/ action_controller/dispatcher.rb:108:in `call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/rails-2.3.5/lib/rails/rack/ static.rb:31:in `call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/urlmap.rb:46:in `block in call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/urlmap.rb:40:in `each' C:/Ruby19/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/urlmap.rb:40:in `call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/rails-2.3.5/lib/rails/rack/ log_tailer.rb:17:in `call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/ content_length.rb:13:in `call' C:/Ruby19/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/handler/ webrick.rb:50:in `service' C:/Ruby19/lib/ruby/1.9.1/webrick/httpserver.rb:111:in `service' C:/Ruby19/lib/ruby/1.9.1/webrick/httpserver.rb:70:in `run' C:/Ruby19/lib/ruby/1.9.1/webrick/server.rb:183:in `block in start_thread' Request Parameters: None Show session dump Response Headers: {"Cache-Control"=>"no-cache", "Content-Type"=>"text/html"} **What should I do? I tried to search online, didn't find much. The only thing I found was something like putting the following into application_controller: before_filter :set_charset, :set_locale def set_charset response.headers["Content-Type"] = "text/html; charset=utf-8" WIN32OLE.codepage = WIN32OLE::CP_UTF8 end but this still doesn't work. I am new to ruby on rails, so don't know much about it. Thanks for your help.

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• Handling database failover for Rails applications on FreeBSD

  - by bianster

  I'm working on implementing database (Postgresql) failover for a Rails app that runs with Passenger/FreeBSD. Due to certain constraints regarding the server OS, it's necessary to continue using FreeBSD (as opposed to say, Ubuntu). I'm finding it to be quite a challenge to have failover handled within the Rails application, by way of a customised database adapter due to the fact that this application will be load-balanced between several webservers, and the multiple Rails processes that Passenger spawned in each webserver. I previously looked at setting up Pacemaker/Corosync to manage database server failover on a common IP but unfortunately I wasn't able to get past building the packages on FreeBSD. It does work rather well on Ubuntu 10.04 but I'm not likely to be able to use Ubuntu due to the OS constraints. I'm considering a custom witness daemon that simply pings the primary DB server, and this witness daemon switches all the webservers to the standby DB server when the primary becomes uncontactable (permanently/temporarily), to avoid split-brain. Though I would really like to know if there is a way to get Pacemaker(or something similar) to do the switch on FreeBSD.

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• How can I convert this PHP script to Ruby? (build tree from tabbed string)

  - by Jon Sunrays

  I found this script below online, and I'm wondering how I can do the same thing with a Ruby on Rails setup. So, first off, I ran this command: rails g model Node node_id:integer title:string Given this set up, how can I make a tree from a tabbed string like the following? <?php // Make sure to have "Academia" be root node with nodeID of 1 $data = " Social sciences Anthropology Biological anthropology Forensic anthropology Gene-culture coevolution Human behavioral ecology Human evolution Medical anthropology Paleoanthropology Population genetics Primatology Anthropological linguistics Synchronic linguistics (or Descriptive linguistics) Diachronic linguistics (or Historical linguistics) Ethnolinguistics Sociolinguistics Cultural anthropology Anthropology of religion Economic anthropology Ethnography Ethnohistory Ethnology Ethnomusicology Folklore Mythology Political anthropology Psychological anthropology Archaeology ...(goes on for a long time) "; //echo "Checkpoint 2\n"; $lines = preg_split("/\n/", $data); $parentids = array(0 => null); $db = new PDO("host", 'username', 'pass'); $sql = 'INSERT INTO `TreeNode` SET ParentID = ?, Title = ?'; $stmt = $db->prepare($sql); foreach ($lines as $line) { if (!preg_match('/^([\s]*)(.*)$/', $line, $m)) { continue; } $spaces = strlen($m[1]); //$level = intval($spaces / 4); //assumes four spaces per indent $level = strlen($m[1]); // if data is tab indented $title = $m[2]; $parentid = ($level > 0 ? $parentids[$level - 1] : 1); //All "roots" are children of "Academia" which has an ID of "1"; $rv = $stmt->execute(array($parentid, $title)); $parentids[$level] = $db->lastInsertId(); echo "inserted $parentid - " . $parentid . " title: " . $title . "\n"; } ?>

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• Properly handling unicode characters in Rails

  - by Gdeglin

  By default Rails allows users of our application to input non-utf8 data, such as: ¶®«¼ However when we attempt to retrieve the data from our database and render it in a template Rails incorrectly assumes that it is in UTF-8 format and throws an error. ArgumentError: invalid byte sequence in UTF-8 What is the best way to handle this? I have seen one fix that suggested sanitizing the data in every place the user can input it. However, that would involve changing a considerable amount of code and it would strip out the characters entirely. Ideally we would want some characters converted to their UTF-8 equivalents. Our environment: Ruby: 1.9.1 Rails 2.3.5 MySql Gem: 2.8.1 This is a serious and urgent problem for us so your answers are very appreciated!

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