installing ruby & rubyOnRails in ubuntu

Ubuntu 10.10, ruby 1.9.2, rubyonrails 3.0.x.

######### INSTALLING ##############

#First, let’s install all of the necessary tools and libraries:
apt-get install curl git-core build-essential zlib1g-dev libssl-dev libreadline5-dev

#Install ruby 1.9.2 using RVM. Refer to the official RVM instructions here. Make sure you have curl #and git installed (from above) and run this command:
bash < <( curl http://rvm.beginrescueend.com/releases/rvm-install-head )

#Then add this line as the last line to your .bashrc:
source “$HOME/.rvm/scripts/rvm”

#Close your terminal and open a new one, then run the following to test your RVM’s installation:
rvm notes

#Next, you can begin ruby 1.9.2 installation by running:
rvm install 1.9.2

#The install will take up to several minutes and once it completes you have to set ruby 1.9.2 as the #default version:
rvm –default ruby-1.9.2

#Then you can test your new ruby install:ruby -v
#install railsgem install rails

#that’s all! (minimum settings)

######## GEM -PACKAGINGs #######

#RuvyGems – slike Maven repository or like apt-get in Ubuntu

# shows all gems (all plugins avaliable for RoR)
gem list –local
gem list –remote

#search by “STRING” in the remote repository
gem search STRING –remote

#do this just in case, and look at the output:
gem install rubygems-update
update_rubygems

######### CREATING AND LAUNCH A NEW APP #########

i may recommend to use rubymine ide, but you should know how create your app in command line:

rails new YOUR_APP_PATH

#start
cd YOUR_APP_PATH
rails server

#launch app
rails s
#or (if you want to set the port by yourself)
rails s –port 8080

#open your browser and type there – this is your aplication:
http://127.0.0.1:3000/

########### CHANGING DB for your app ###########

#i suppose you would like to work with mysql database instead of using default one (which is defined in your_app_path/config/database.yml )
so, in order to switch the db for your project, you should:

1. edit tht file database.yml like this:
   development:
   adapter: mysql2
   encoding: utf8
   reconnect: false
   database: myproject_development
   pool: 5
   username: root
   password:
   socket: /var/run/mysqld/mysqld.sock 

   #do it for all databases not only for development one (if you wish)
   #by the way: Ruby on Rails recommends to create three databases
   1. myproject_development
   2. myproject_production
   3. myproject_test

2. add some libs and gems.. for mysql support
   sudo apt-get install libmysqlclient-dev
   gem install mysql2
3. add new line to your project’s folder
   to file: Gemfile
   line: gem ‘mysql2′
   #it means that you are going to use this module/gem in your project
4. create the databases for your project
   cd your_app_path
   rake db:create
   #it will create 2 databases – for development and for tests

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