Rails version coexistence

rubyonrails-talk
1

Hi,

What is the correct way to get multiple rails installs to cooperate with each other?

I've got nine projects that I built on my (windows) workstation and deployed to a linux server. The linux server is running ruby 1.8.4 and rails 1.1.6. Another project came along and it was built on a different workstation, by a different developer, and I helped out after the fact. It's on rails 1.2.3, which is frozen in the vendor subdirectory for that particular project.

In order to get things working on my local workstation, I had to update all of the gems, and I believe ruby. gem list on my local machine shows rails at 1.2.3 and 1.1.6. ruby -v shows 1.8.6.

However, since that update, I can't start the local server on any of the older projects, which is hurting my ability to get anything done in those projects.

script/server on my workstation returns: ruby script/server ./script/../config/boot.rb:28:Warning: require_gem is obsolete. Use gem instead.

The server starts, but will not process requests without throwing an "application error"

The development log shows the following:

$ tail -f development.log c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:67:in `dispatch ' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/commands/servers/webrick. rb:59 c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_re quire' c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/de pendenci es.rb:147:in `require' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/commands/server.rb:30 c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_re quire' c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/de pendenci es.rb:147:in `require' script/server:3 wrong number of arguments (1 for 0) c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/ven dor/mysq l.rb:551:in `initialize' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/ven dor/mysq l.rb:551:in `new' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/ven dor/mysq l.rb:551:in `scramble41' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/ven dor/mysq l.rb:141:in `real_connect' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/con nection_ adapters/mysql_adapter.rb:330:in `connect' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/con nection_ adapters/mysql_adapter.rb:87:in `initialize' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/con nection_ adapters/mysql_adapter.rb:36:in `new' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/con nection_ adapters/mysql_adapter.rb:36:in `mysql_connection' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/con nection_ adapters/abstract/connection_specification.rb:251:in `send' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/con nection_ adapters/abstract/connection_specification.rb:251:in `connection_without_query_c ache=' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/que ry_cache .rb:54:in `connection=' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/con nection_ adapters/abstract/connection_specification.rb:220:in `retrieve_connection' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/con nection_ adapters/abstract/connection_specification.rb:78:in `connection' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/bas e.rb:696 :in `columns' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/bas e.rb:704 :in `columns_hash' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/s ession/a ctive_record_store.rb:103:in `setup_sessid_compatibility!' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/s ession/a ctive_record_store.rb:77:in `find_by_session_id' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/s ession/a ctive_record_store.rb:281:in `initialize' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/bas e.rb:794 :in `silence' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/s ession/a ctive_record_store.rb:281:in `initialize' c:/ruby/lib/ruby/1.8/cgi/session.rb:273:in `new' c:/ruby/lib/ruby/1.8/cgi/session.rb:273:in `initialize' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/c gi_proce ss.rb:112:in `new' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/c gi_proce ss.rb:112:in `session' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/c gi_proce ss.rb:142:in `stale_session_check!' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/c gi_proce ss.rb:108:in `session' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/b ase.rb:9 18:in `assign_shortcuts_without_flash' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/f lash.rb: 141:in `assign_shortcuts' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/b ase.rb:4 02:in `process_without_filters' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/f ilters.r b:377:in `process_without_session_management_support' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/s ession_m anagement.rb:117:in `process' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/dispatcher.rb:38:in `dispatch' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:115:in `handle_ dispatch' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:81:in `service'

c:/ruby/lib/ruby/1.8/webrick/httpserver.rb:104:in `service' c:/ruby/lib/ruby/1.8/webrick/httpserver.rb:65:in `run' c:/ruby/lib/ruby/1.8/webrick/server.rb:173:in `start_thread' c:/ruby/lib/ruby/1.8/webrick/server.rb:162:in `start' c:/ruby/lib/ruby/1.8/webrick/server.rb:162:in `start_thread' c:/ruby/lib/ruby/1.8/webrick/server.rb:95:in `start' c:/ruby/lib/ruby/1.8/webrick/server.rb:92:in `each' c:/ruby/lib/ruby/1.8/webrick/server.rb:92:in `start' c:/ruby/lib/ruby/1.8/webrick/server.rb:23:in `start' c:/ruby/lib/ruby/1.8/webrick/server.rb:82:in `start' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/webrick_server.rb:67:in `dispatch ' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/commands/servers/webrick. rb:59 c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_re quire' c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/de pendenci es.rb:147:in `require' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/commands/server.rb:30 c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_re quire' c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.3.1/lib/active_support/de pendenci es.rb:147:in `require' script/server:3

So, for the short term, how can I get get webrick to run both the old projects and new projects, on my local workstation, as needed, keeping in mind that the production server runs ruby 1.8.4 and rails 1.1.6? Second, is there a 'correct' way to upgrade a rails app from an older release? For example, I see that the boot.rb files from the older and newer projects have some differences.

Thank you.

Regards,

Rich

2

What is the correct way to get multiple rails installs to cooperate with each other?

AIUI, using vendor/rails is the standard way.

I've got nine projects that I built on my (windows) workstation and deployed to a linux server. The linux server is running ruby 1.8.4 and rails 1.1.6. Another project came along and it was built on a different workstation, by a different developer, and I helped out after the fact. It's on rails 1.2.3, which is frozen in the vendor subdirectory for that particular project.

I'd consider going ahead and freezing Rails in each app, just to keep things stable for each.

However, since that update, I can't start the local server on any of the older projects, which is hurting my ability to get anything done in those projects.

I can imagine! Are the production installations working okay? If so, you can check which versions of Ruby and gems are used, and use them to reconfigure the development machines.

script/server on my workstation returns: ruby script/server ./script/../config/boot.rb:28:Warning: require_gem is obsolete. Use gem instead.

As it says, this is just an warning, so I don't think you need to worry about this, at least for now. (Though you should consider upgrading your Rails in these so this warning goes away.)

c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/ven dor/mysq l.rb:551:in `initialize' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/ven dor/mysq l.rb:551:in `new' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/ven dor/mysq l.rb:551:in `scramble41' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/ven dor/mysq l.rb:141:in `real_connect' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/con nection_ adapters/mysql_adapter.rb:330:in `connect' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/con nection_ adapters/mysql_adapter.rb:87:in `initialize' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/con nection_ adapters/mysql_adapter.rb:36:in `new' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/con nection_ adapters/mysql_adapter.rb:36:in `mysql_connection' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.14.4/lib/active_record/con nection_

It looks like you might be having problems connecting to your database server. Can you connect to your database outside of Rails using the configuration in database.yml? If not, I think that's your error.

So, for the short term, how can I get get webrick to run both the old projects and new projects, on my local workstation, as needed, keeping in mind that the production server runs ruby 1.8.4 and rails 1.1.6? Second, is there a 'correct' way to upgrade a rails app from an older release? For example, I see that the boot.rb files from the older and newer projects have some differences.

I don't know if there are any specific issues with using Ruby 1.8.4 with Rails 1.1.6. The current recommendations are 1.8.5 for Rails 1.2.

Good luck!

Michael Glaesemann grzm seespotcode net

3

Hi,

Thanks for the info, it is helpful. In answer to your questions, all the sites work fine on the production server, which is rails 1.1.6, and ruby 1.8.4. I had to upgrade my workstation, which is now rails 1.2.3 and ruby 1.8.6. It's my workstation that can't seem to play in both the old and new rails sites. The old sites throw an error in the mysql module.

After digging around in the mysql.rb of active record, I discovered there is a co-existence problem between rails 1.1.6 and ruby 1.8.6. Specifically, the Digest::SHA1 interface was changed. Not sure why.

Here is my hack:

  def scramble41(password, message)     return 0x00.chr if password.nil? or password.empty?     buf = [0x14]

    # Work with older or newer ruby     if RUBY_VERSION.gsub(/\./, '').to_i < 186       s1 = Digest::SHA1.new(password).digest       s2 = Digest::SHA1.new(s1).digest       x = Digest::SHA1.new(message + s2).digest     else       s1 = Digest::SHA1.digest(password)       s2 = Digest::SHA1.digest(s1)       x = Digest::SHA1.digest(message + s2)     end

    (0..s1.length - 1).each {|i| buf.push(s1[i] ^ x[i])}     buf.pack("C*")   end

At least I can work with both the old and new projects on my workstation now.

Thank you.

Regards, Rich