Short Introduction to Rails
Install:
Overview useful components: ruby-toolbox.com
Must haves:
- homebrew /macports
- git
- rvm
Load RVM extensions + completion
[[ -s $HOME/.rvm/scripts/rvm ]] && source $HOME/.rvm/scripts/rvm
[[ -r $rvm_path/scripts/completion ]] && . $rvm_path/scripts/completion
create proj folder:
$ mkdir 'test'
create .rvmrc
$ rvm use ruby-1.9.2-rc2@test --create
Init git
$ git init
Interesting gems:
rake (0.8.7)
bundler (1.0.7)
cheat (1.3.0)
gemedit (0.9.0)
gist (2.0.0)
git (1.2.5)
hirb (0.3.5)
jeweler (1.5.1)
what_methods (1.0.1)
wirble (0.1.3)
awesome_print (0.3.1)
Useful commands:
- rails gems
$ gem install rails - create rails project
$ rails new . -d mysql -J - check Gemfile for needed gems
$ bundle install - check DB file
cp database.yml database_example.yml
$ cat 'db/database.yml' >> .gitignore
getting started
Scaffold: rails g scaffold Sentence text:text type:string language:string
Database: rake db:migrate
See all rake commands: rake -T
Rails console
reload!- ` _` show last result
Sentence.find( :first)
Sentence.first
Sentence.find( :first, :conditions => {} )
## AEL
Sentence.first.where( :language => 'de' )
Sentence.where( :language => 'de' ).order("RAND()").limit(1)