120 seconds guide to JRuby on Rails
So, you have that new and shiny JRuby 1.1 and would like to try it out with rails. Here’s a quickest guide to do so! The guide assumes that you want to use MySQL as the database, and it has already been installed.
First, install the following gems:
- mongrel – simple but powerful web server.
- activerecord-jdbcmysql-adapter – all you need for activerecord on JRuby to talk to MySQL.
- rails – well, the Ruby on Rails proper.
The command line:
1: jruby -S gem install mongrel activerecord-jdbcmysql-adapter rails
Create a sample rails application with MySQL backend:
1: jruby -S rails myapp -d mysql
Enter the newly-created “myapp” directory, then modify the config/database.yml. First and foremost, you need to adjust the adapter name, and instead of ‘mysql’ you should specify ‘jdbcmysql’. You might also want to delete the lines starting with “socket:”.
Here’s a simple example for the development environment:
1: development:
2: adapter: jdbcmysql
3: encoding: utf8
4: database: myapp_development
5: username: root
6: password:
Now, it’s time to create our database:
1: jruby -S rake db:create:all
The next step is to create some minimal scaffolding so that you could actually play with some dynamic functionality and database access:
1: jruby script/generate scaffold post title:string body:text published:boolean
We need to update the database after that:
1: jruby -S rake db:migrate
And we’re basically done here, just start rails via:
1: jruby script/server
and point your browser to the:
Enjoy!
April 13th, 2008 at 11:40 pm
is there a way to run mongrel cluster?
April 15th, 2008 at 9:55 am
Khell, yes there is. Take a look here: http://ola-bini.blogspot.com/2007/05/announcing-mongreljcluster.html
Also, there was a bug in early days of JRuby 1.1RC, but it was fixed for JRuby 1.1: http://jira.codehaus.org/browse/JRUBY-1705
April 22nd, 2008 at 8:53 pm
Hi,
Do you (or anyone) know the “official” list of things to install when working with Jruby, rails and mysql?
I’ve seen reference to needing to install mysql-connector into the jruby install directory, or activerecord-jdbc-adapter, or just the activerecord-jdbcmysql-adapter you mentioned above.
thanks!
April 22nd, 2008 at 9:12 pm
Jay, the list of gems, provided in the blog entry, is what’s needed, nothing else. Well, activerecord-jdbcmysql-adapter gem has dependencies on other gems and they will be installed automatically.
July 10th, 2008 at 11:03 pm
Good!!!
I have developed with the NetBeans 6.1 and liked so much.
August 9th, 2008 at 6:44 pm
Honi soit legate left buy cytotec then announced daughters.
October 13th, 2008 at 10:19 am
[...] Getting a database running on mongrel is really quite easy. A few failed attempts on starting “glassfish” on my machine made me try this link: 120 seconds [...]
November 27th, 2008 at 1:41 pm
great ,
it works man
December 9th, 2008 at 2:44 pm
How can I migrate a working Ruby on Rails project to a JRuby on Rails project?
January 13th, 2009 at 6:58 pm
[...] JRuby/Rails After several failed attempts at getting jruby/rails to work nicely with sqlite3, I fell back to mysql w/ this tutorial: http://blog.emptyway.com/2008/04/08/120-seconds-guide-to-jruby-on-rails/ [...]
January 15th, 2009 at 7:26 am
How can we implement Hibernate into a JRuby On Rails project.
Where to fit the servlet.xml,web.xml, pojos, hbm mapping files, etc into the rails directory structure.
February 17th, 2009 at 1:54 pm
For me it worked better using sqlite3 instead of mysql
April 28th, 2009 at 4:50 pm
if you get stuck at “jruby -S rake db:create:all” using mysql, create the myapp_production database manually and then run the db:create:all command.
June 8th, 2009 at 9:55 am
Nice tutorial.
But how do you call java code (e.g. your own jars or classes) from your controller?
June 12th, 2009 at 4:16 pm
>jruby -S gem install mongrel activerecord-jd
bcsqlite3-adapter rails
>jruby -S rails myapp -d sqlite3
>cd myapp
>edit config/environment.rb
development:
adapter: jdbcsqlite3
database: db/development.sqlite3
pool: 5
timeout: 5000
>jruby -S rake db:create:all
>jruby script/generate scaffold post title:st
ring body:text published:boolean
>jruby -S rake db:migrate
>jruby script/server
http://localhost:3000/posts
very good!!
thanks!
July 3rd, 2009 at 3:35 pm
fuzzbuzz: to call your own Java code you need to first make sure that the classes or JARs are in your path. Then it’s just a matter of requiring them in your controller (see http://kenai.com/projects/jruby/pages/CallingJavaFromJRuby).
require ‘path/to/mycode.jar’
class MyController < ApplicationController
def index
…
Java::MyJavaPackage::MyJavaClass.do_something
…
end
end
July 16th, 2009 at 11:39 am
Thanks mate. I am evaluating JRuby and this is a clean, simple and very useful tutorial. Well it took me more than 120 secs, probably 240
August 3rd, 2009 at 8:50 pm
Good tutorial. What release of rails supports the jruby. I am running rails 1.2.3 and after creating the database I am doing a jruby -s rake db:migrate and am getting
rake aborted!
database configuration specifies nonexistent jdbcmysql adapter.
Here is my database.yml
# MySQL (default setup). Versions 4.1 and 5.0 are recommended.
#
# Install the MySQL driver:
# gem install mysql
# On MacOS X:
# gem install mysql — –include=/usr/local/lib
# On Windows:
# gem install mysql
# Choose the win32 build.
# Install MySQL and put its /bin directory on your path.
#
# And be sure to use new-style password hashing:
# http://dev.mysql.com/doc/refman/5.0/en/old-client.html
development:
adapter: jdbcmysql
encoding: utf8
database: testclient_development
username: root
password:
port: 3306
host: localhost
# Warning: The database defined as ‘test’ will be erased and
# re-generated from your development database when you run ‘rake’.
# Do not set this db to the same as development or production.
test:
adapter: jdbcmysql
encoding: utf8
database: testclient_test
username: root
password:
port: 3306
host: localhost
production:
adapter: jdbcmysql
encoding: utf8
database: testclient
username: root
password:
port: 3306
host: localhost
I have activerecord-jdbc-adapter-0.9.1 in the
/org.jruby.1.2.6/lib/ruby/gems/1.8.gems directory?
Any ideas???
August 24th, 2009 at 5:14 pm
Renan,
Já viu este framework??? é o JRuby on Rails, deve ser bom….
August 31st, 2009 at 1:07 pm
JRUBY am able to run test app .
running backgroundrb is much pain. BGRB not working in JRUBY??? .
Any other option ??!@#$
Will JRUBY works better than RUBY-1.9 ?.
September 1st, 2009 at 7:06 am
eoh의 생각…
jruby getting started 따라하다 삽질 좀 했다. 일단 database.yml 설정을 jdbcmysql 으로 바꿔야 하는 부분이 빠져있고, 시냅틱으로 설치한 mysql의 charset 설정을 바꿔주는부분을 찾느라 대굴대굴. 정답은 …
October 4th, 2009 at 8:10 am
I’ve no error or warning when I run jruby -S rake db:create:all.
But when I want to run jruby -S rake db:migrat
(in /data/home/haluk/dev/myapp)
rake aborted!
The driver encountered an error: com.mysql.jdbc.exceptions.MySQLSyntaxErrorException: Unknown database ‘myapp_development’
(See full trace by running task with –trace)
jruby -S rake db:create:all does not create db but why ?
my db config:
development:
adapter: jdbcmysql
encoding: utf8
database: myapp_development
username: root
password: xxxx
I can enter mysql server using username: root an passwort: xxxx.
(mysql -u root -p)
activerecord-jdbcmysql-adapte is installed aswell
jdbc-mysql-5.0.4 activerecord-jdbc-adapter-0.9.2
I’m using jruby-1.4.0RC1 and rails version 2.2
October 4th, 2009 at 8:12 am
rails verion is 2.3.4 (not 2.2)
October 15th, 2009 at 3:23 pm
Haluk, please take a look at the following entry by Nick with explanation:
http://blog.nicksieger.com/articles/2009/10/12/fresh-0-9-2-activerecord-jdbc-adapter-release
Еssentially, with this new version of activerecord-jdbc, you don’t need to modify the database.yml anymore, but you need to run one additional command: jruby script/generate jdbc
November 11th, 2009 at 3:49 am
Thanks everybody!!
————-
>mysql -u root -p
Enter password: *****
Welcome to the MySQL monitor.
Your MySQL connection id is 173
Server version: 5.0.77-community-nt MySQL Community Edition (GPL)
Type ‘help;’ or ‘\h’ for help. Type ‘\c’ to clear the buffer.
mysql>
————-
>jruby -v
jruby 1.4.0 (ruby 1.8.7 patchlevel 174) (2009-11-02 69fbfa3) (Java HotSpot(TM) C
lient VM 1.5.0_10) [x86-java]
————-
>jruby -S gem list
*** LOCAL GEMS ***
actionmailer (2.3.4)
actionpack (2.3.4)
activerecord (2.3.4)
activerecord-jdbc-adapter (0.9.2)
activerecord-jdbcmysql-adapter (0.9.2)
activeresource (2.3.4)
activesupport (2.3.4)
gem_plugin (0.2.3)
jdbc-mysql (5.0.4)
mongrel (1.1.5)
rack (1.0.1)
rails (2.3.4)
rake (0.8.7)
rspec (1.2.9)
sources (0.0.1)
——————–
>jruby -S gem install mongrel activerecord-jdbcmysql-adapter rails
>jruby -S rails jmyapp -d mysql
>cd jmyapp
>jruby script/generate jdbc (Good!!)
>no edit config/environment.rb
>jruby -S rake db:create:all
>jruby script/generate scaffold post title:st
ring body:text published:boolean
>jruby -S rake db:migrate
>jruby script/server
http://localhost:3000/posts
very good!!
thanks!
November 11th, 2009 at 1:58 pm
to Haluk Durmus:
execute “jruby script/generate jdbc” in your app root:)
November 12th, 2009 at 1:31 pm
Hi,
since everybody seems to get it up and running, I must miss something important here … I followed the steps in the tutorial, but after entering the first post, I get the following error from the Action Controller:
post_url failed to generate from {:controller=>”posts”, :action=>”show”, :id=>#<Post id: #, title: “MyFirstPost”, body: “This is my first post”, created_at: “2009-11-12 11:04:04″, updated_at: “2009-11-12 11:04:04″>}, expected: {:controller=>”posts”, :action=>”show”}, diff: {:id=>#<Post id: #, title: “MyFirstPost”, body: “This is my first post”, created_at: “2009-11-12 11:04:04″, updated_at: “2009-11-12 11:04:04″>}
Extracted source (around line #13):
10:
11:
12:
13:
14:
15: ‘Are you sure?’, :method => :delete %>
16:
Can anybody help me getting started?
Thanks,
Michael
February 21st, 2010 at 8:38 pm
Hi Michael,
I am getting the same error than you.
Did you find a solution ?
Seb