#265 Rails 3.1 Overview

May 09, 2011 | 13 minutes | Rails 3.1

This is the first episode in a series covering Rails 3.1. Here I show how to install the beta and show some of the new features.

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Note: The Active Record Identity Map feature is now disabled by default and is currently not recommended due to problems with associations. It looks like it will not make it into 3.1 final.

          bash
        
rvm 1.9.2@railspre --create
gem install rails --pre
rails new todo
cd todo
bundle
rails g scaffold project name:string
rake db:migrate
rake test

          rails console
        
p = Project.create!(:name => "Yardwork")
p2 = Project.find(1)
p.object_id == p2.object_id

          projects.js
        
alert "Hello world!"

          models/project.rb
        
has_many :tasks
has_many :assigments, :through => :tasks
has_many :users, :through => :assignments

attr_accessible :name, :as => :admin

          projects_controller.rb
        
@project.update_attributes(params[:project], :as => :admin)

          rhtml
        
<%= link_to "Edit", edit_project_url(@project, :subdomain => "foo") %>