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Update rails readme to reflect current reality
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git-svn-id: http://svn.codehaus.org/jruby/trunk/jruby@2097 961051c9-f516-0410-bf72-c9f7e237a7b7
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enebo committed Jun 30, 2006
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Ruby on Rails works more or less with JRuby 0.9.0. It is slower than we would
like, but it gives a good feeling of how well JRuby has been progressing
lately. To get started:
lately. For reasons still not completely understood Ruby on Rails only works
properly using Java5 and higher. It does not currently work with Java 1.4.2.
We will be looking into this for 0.9.1 release of JRuby.

1. Install Rails gem (with dependencies)
2. Apply patch to rails gem: docs/patches/rails/rails-1.1.2-blockargs-fix.patch
3. Generate your Rails application using JRuby
4. Start Rails*: jruby scripts/server webrick
To get started:

If you use a activerecord connection you will need to
1. Install Rails gem (with dependencies)*:
% gem install --no-rdoc --no-ri rails
2. Generate your Rails application using JRuby
% jruby ${JRUBY_HOME}/bin/rails my_app
3. Start Rails:
% jruby scripts/server

1. download the activerecord connector from Nick Sieger:
http://blog.nicksieger.com/articles/2006/05/15/jruby-on-rails-and-activerecord-on-jdbc
2. Put the jdbc_adapter.rb file into:
lib/ruby/gems/1.8/gems/activerecord-1.14.2/lib/active_record/connection_adapters/
3. Add a line to let Rails know you want to use jdbc adapter (well just jdbc in JRuby):
RAILS_CONNECTION_ADAPTERS = %w( jdbc )
4. Make sure jdbc driver you configure in database.yml is included into your Java
CLASSPATH.**
To use a database connection you need to use an experimental adapter by Nick Sieger.
This adapter currently has only been tested on MySQL, but it sounds like Nick is trying
it with additional databases. To use the JDBC adapter you will need to:

Here is an example database.yml section for those who may not be familiar with JDBC:
development:
1. download the JDBC activerecord connector from Nick Sieger:
% jruby script/plugin install http://svn.caldersphere.net/svn/main/activerecord-jdbc/trunk/activerecord_jdbc/
2. Add the following line to your conf/environment.rb file
config.frameworks -= [:active_record]
3. Configure your database settings in database.yaml. Here is a sample:
adapter: jdbc
driver: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/cookbook
username: root
password: yeahpwhere
4. Make sure jdbc driver is in your Java CLASSPATH:
export CLASSPATH=/my_path_to/driver.jar

* We need to explicity specify webrick for this release. We will fix this for 0.9.1.
** This connector I believe has only been tested with MySQL, but may work with others.
It sounds like Nick has discovered some challenges which may or may not be a problem
for more other jdbc adapters.
*If you are explicitly installing an older rails version 1.1.12 or 1.1.13 then you need
to apply a patch in docs/rails the Rails gem after it has been installed. As of version
1.1.14 the patch is unneccesary.

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