Action Dispatch Action Dispatch contains a new syntax for routing which is even more concise and readable.
Bundler & Action Mailer Rails 3 ships with Bundler, a Ruby library that makes Dependency Management a painless process.
Active Relation & Active Model Active Relation gives you a more powerful syntax for pulling data into your application. Well learn about the new syntax and discover how to leverage Active Model to enhance our plain old Ruby objects.
New Action Controller The Action Controller stack has been completely overhauled to allow for increased modularity and code reuse. Well learn about Abstract Controller and the new respond_to syntax to help simplify RESTful controllers.
Rails Ruby Rails or 1.9.2 Mac OS X 10.5 RubyGems Ruby Rails gem install rails
Rails Mac OS X Ruby Rails Rails RubyGems sudo gem update --system sudo gem install rails fetch gem list … gem server http://localhost:8088 …
expenses rails new expenses cd expenses rails server http://localhost:3000
Hello, Rails! Hello, World! rails generate controller Say cd expenses rails server http://localhost:3000
Manifesto for Agile Software Development We are uncovering better ways of developing software by doing it and helping others do it. Through this work we have come to value: Individuals and interactions over processes and tools Working software over comprehensive documentation Customer collaboration over contract negotiation Responding to change over following a plan That is, while there is value in the items on the right, we value the items on the left more. http://agilemanifesto.org/