one controller per step
- each controller saves and redirect to next step
- duplicate code
- controller manages steps
one action/presenter per step
- not restful
session accumulation
- not scalable
hidden value accumulation
- persist values in hidden form fields
- .net webforms approach
- not secure
state machine
- model manages steps
- presentation logic in model
gems

Wizards implement the builder design pattern

each step is a partial view of the model

Object Oriented Views (Confreaks)

Andrew Warner (Twitter)

https://github.com/rapgenius/perspectives
https://rubygems.org/gems/perspectives

Holy Grail

Best possible user experience combined with the best possible developer experience.

no full page reloads
feels like desktop/native
developer friendly framework
don't repeat yourself
mostly single language (Ruby, JavaScript, Rip)
search engine friendly

Closest framework today is Rendr by AirBnB

Also duplicate code, TurboLinks and front-end clients (AngularJS, Ember)

Perspectives (new approach)

lowest common denominator == dumbest possible template

separation of concerns
testing (just testing plain ruby objects)
easy caching

Make An Event Of It

Jason Clark (Twitter)

https://github.com/jasonclark/simple_events
https://github.com/cyprus/mutations

Where are we going?

pattern
coupling
meechanics
responsibility

Notifier
Eventing System
[ Subscriber ]

Internal Coupling

Concerns, Decorators, Presenters, Service Objects, Helpers: Help Me Decide! (ConFreaks)

Justin Gordon

https://github.com/justin808/fat-code-refactoring-techniques

Guidelines

methods less than 5 lines
classes less than 100 lines
one instance variable per view

Objectives

dry
easy to test
clarity
easy to find
easy to change

Advanced AREL: When ActiveRecord Just Isn't Enough (Confreaks)

Cameron Dutro (Twitter)

http://www.scuttle.io/

Stop writing SQL in AREL queries!

have to know specific, potentially non-portable, syntax
no syntax checking
not chainable
what does ? mean?

Examples

Post.select(Post.arel_table[:visitors].count).to_sql
Post.select(Post.arel_table[:visitors].min).to_sql
Post.select(Post.arel_table[:visitors].max).to_sql
Post.select(Post.arel_table[:visitors].sum).to_sql

Post.select(Arel.star).to_sql

Post.select(:id).from(Post....ast)

Post.where(Post[:title].eq('some string')).to_sql
Post.where(Post[:some_number].lteq(42)).to_sql
Post.where(Post[:title].eq('some string').and(Post[:id].in(22, 23))).to_sql

Post.joins(:comment).where(:id => 42).to_sql
Post.joins(:comment).where(Post[:id].eq(42)).to_sql
Post.joins(Comment.joins(:posts).join_sources).where(Post[:id].eq(42)).to_sql

Keynote: What Happens To Everyone, When Everyone Learns To Code? (ConFreaks)

Farrah Bostic (Twitter)

Fantastic talk, must watch video.