Session problems with Mongrel and Jruby on rails

If you get a "wrong number of arguments(2 for 1)" in the stale_session_check method when running your jruby ruby on rails application, the problem may be your sessions. Clear the sessions and delete all rows from the sessions database table if you are using one. Then add to environment.rb: config.action_controller.session = { :session_key => "_myapp_session", :secret => "some secret phrase of at least 30 characters" } The code has to be inside the Rails::Initializer.run do |config| block.

NetBeans' rake create WAR for linux problem

At least in linux, NetBeans' rake create WAR will fail when there is file that contains a space in its name. So please, make sure none of your files in the whole rails project have a space in the filename.

Rubyscript2Exe is not deleting the temp files once it is done: SOLVED!

Is your Ruby on rails application packed in a exe created by Rubyscript2Exe? Is Ruby2Exe not deleting the temp files once it is done? I came out with the solution of deleting the files of previous run: 1. Replace the contents of init.rb with this:

require "rubyscript2exe"
require "fileutils"

at_exit do
  require "irb"
  require "drb/acl"
  require "dbi"  
  require "dbd/ODBC/ODBC"
  #Add the libraries you need

end

  if RUBYSCRIPT2EXE.is_compiled?

  ee_base_folder = File.expand_path(RUBYSCRIPT2EXE.appdir + "/../..")
  ee_folder = File.expand_path(RUBYSCRIPT2EXE.appdir + "/..")
  name_parts =  ee_folder.split(".")
  curr_ee_folder_number = name_parts[3].to_i
  last_ee_folder_number = curr_ee_folder_number - 1
  Dir.entries(ee_base_folder).each do |folder|
    if (folder != ".") and (folder != "..") and (folder.split(".")[3].to_i != curr_ee_folder_number)
      
      folder_to_del = ee_base_folder + "/" + folder
      puts "deleting " + folder_to_del
      FileUtils.remove_dir(folder_to_del, true) 
    end
    
  end
end
load "script/server"

2. Before running your application make sure you run this windows batch command to delete the temporary files created by tar2script:

erase /F /S /Q "%USERPROFILE%\Local Settings\Temp\tar2rubyscript*.*"

Database configuration sample for accessing MS SQL in Jruby's rails

Use NetBeans to create the rails project using Jruby. Make sure you select "use JDBC". The database yml for connecting to MS SQL through ODBC:

development:
   adapter: jdbc
   username: MYUSERNAME
   password: "14 if your password starts with a number enclose the password in double quotes"
   driver: sun.jdbc.odbc.JdbcOdbcDriver
   url: jdbc:odbc:MYDNSNAME