Rails 2.0 Presentation

Rails 2.0 “evolution, not revolution”

Rails 2.0 Overview RESTful web architectures some small feature maturations removal of features determined to be not essential

Action Pack ActionController + ActionView

Multiview “Machine-Gunning .rhtml and .rxml” (action.mimetype.renderer) show.html.erb index.atom.builder edit.iphone.haml

Partial Layouts

Routing Resources

Routing Namespaces link_to ‘variants’, admin_product_variants_url(@product) /admin/products/:product_id/variants

Record Identiﬁcation redirect_to(person) link_to(person.name, person) form_for(person)

HTTP Authentication

authenticate_or_request_with_http_basic

Exception Handling

controllers/application.rb rescue_from

Atom Feed Helper

Stolen from the DHH announcement

Mime::Type Predicates controller.request.format.html? controller.request.format.xml?

Performance Asset Servers Asset Caching Cookie Based Sessions

most browsers will only make up to two simultaneous connections to any one domain Asset Servers

conﬁg/environment.rb Asset Servers

conﬁg/environment.rb Asset Servers will always use the same server for a single ﬁle

Asset Caching

Cookie Based Sessions

example stolen from ryan daigle Cookie Sessions Security

Security CSRF Protection TextHelper#sanitize HTTP only cookies

CSRF Protection

Active Resource Short Overview of Resources

A consumer of RESTful resources Active Resource

A consumer of RESTful resources As ActiveRecord is a consumer of relational database resources Active Resource

ActiveResource Models

Active Resource Actions Http REST request Model request Request URI Response operation body ﬁnd(id) GET n/a /people/id.xml <XML> Status: save (update) PUT <XML> /people/id.xml 200 OK Location: save (create) POST <XML> /people http://x/people/id.xml Status: destroy DELETE n/a /people/id.xml 200 OK list GET n/a /people <XML> credit: ryan diagle

Active Record

Validations

:allow_blank validates_numericality

Sexy Migrations

“Cold Shower” Migrations

Err Sexy Migrations

Rails 2.0 Sexy 4 fewer lines + rails programmers == sexy

References

Query Cache

Query Cache Logging

Disabling the Query Cache

Fixtures Foxy Fixtures Collection Fixtures Fixture Performance

conferences.yml places.yml Foxy Fixtures

Was Now Collection Fixtures

Data Exchange to_xml, from_xml to_json, from_json

/conferences/show/1.js to_json

to_xml

Other Stuff

rake notes

rake db rake db:create rake db:create:all rake db:drop rake db:drop:all rake db:reset rake db:rollback rake db:version

rake routes

rake routes route name, HTTP method, route path, route requirements

helper :all

rails my_new_app

Request Proﬁler RubyProf Wrapper ./script/performance/request -n 10 login_session.rb

/conﬁg/initializers/

initializers directory

conﬁg/preinitializer.rb loaded before the environment ﬁles

Scaffolding ./script/generate scaffold conference name:string description:text start_date:date end_date:date

Resourceful Scaffolding

Breakpoints

gem install ruby-debug

add ‘debugger’ to code

./script/server -u

www.datanoise.com/ruby-debug

Upgrading to 2.0

Deprecations

with_scope

Components

Pagination

Object Transactions

http://code.bitsweat.net/svn/object_transactions/

ActionWebService ActiveResource

syntax changes @params params[] @session session[] @flash flash[] @request request[] @env env[] find_all find(:all) find_first find(:first) render_partial render :partial :post => true :method => :post

start_form_tag end_form_tag form_for do end

start_form_tag end_form_tag form_tag </form>

Extracting to Plugins and Gems acts_as some js helpers commercial database adapters

./script/plugin install acts_as_list acts_as_nested_set acts_as_tree auto_complete in_place_editing

gem install activerecord-X-adapter --source http://gems.rubyonrails.com ﬁrebird frontbase informix openbase oracle sqlserver sybase

Upgrade Process gem install rails -y

Resources • Peepcode Rails2 PDF - Ryan Daigle ($9) • http://weblog.rubyonrails.org • /2007/12/7/rails-2-0-it-s-done • http://ryandaigle.com • /articles/2007/12/7/rails-2-0-ﬁnal-released-summary-of-features • http://www.slashdotdash.net • /articles/2007/12/03/rails-2-upgrade-notes

Thanks! noesbueno.org/rails2

Work with me @ http://www.reactrix.com/careers.php schacon@gmail.com Sr. Web Developer Linux Systems Administrator Sr. Game/Interaction Programmer Computer Vision Engineer

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Rails 2.0 Presentation

by Scott Chacon on Dec 13, 2007

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