“Web development that doesn’t hurt”
Thursday, February 5, 2009

“Faster, Lighter, More Agile”
Thursday, February 5, 2009

Merb == Rails
Merb != Rails
Rails << Merb
Thursday, February 5, 2009

Merb == Rails
Thursday, February 5, 2009

“Rails is a Model View Controller
web framework written in Ruby.”
Thursday, February 5, 2009

“Merb is a Model View Controller
web framework written in Ruby.”
Thursday, February 5, 2009

merb-gen app blog rails blog
Thursday, February 5, 2009

Merb != Rails
Thursday, February 5, 2009

Merb = Mongrel + erb
Thursday, February 5, 2009

Hey there folks-
I'm happy to announce the first useable release of my new pocket-
Merb is a mongrel handler with
framework Merb.
built in controller and view templating with
erb. It has a nice routing system similar to rails but much simpler.
It uses some of the code from the camping handler and the rails
handler and then some of its own secret sauce
to form imho a nice fast little framework.
-- Ezra Zygmuntowicz, 10-2006
Thursday, February 5, 2009

Merb -= Mongrel
Merb -= erb
Thursday, February 5, 2009

Enter Rack
“Rack provides an minimal interface between webservers
supporting Ruby and Ruby frameworks.”
Thursday, February 5, 2009

Camping Passenger
Ramaze Mongrel
Rack
Merb Thin
Sinatra WEBrick
... ...
Handlers Adapters
Thursday, February 5, 2009

Rails Merb
ORM ActiveRecord Pick one!
Test framework Test::Unit Don’t care!
Template language erb Your choice!
JS framework Prototype Whatever!
Thursday, February 5, 2009

rails
The full monty under your
fingertips with a single command.
Thursday, February 5, 2009

actionmailer
actionpack
activerecord
activeresource
activesupport
rails
Thursday, February 5, 2009

merb
Small core, build your personal
stack with available gems.
Thursday, February 5, 2009

merb-helpers merb-cache
merb-mailer merb-assets
merb-slices merb-action-args
merb-core
merb-param-protection merb-exceptions
merb-auth-core merb-auth-more
merb-auth-slice-password
Thursday, February 5, 2009

“the framework”
merb-helpers merb-cache
- Router
- Controller
merb-mailer merb-assets
- Logger
- Provide hooks for plugins
merb-slices merb-action-args
merb-core
merb-param-protection merb-exceptions
merb-auth-core merb-auth-more
merb-auth-slice-password
Thursday, February 5, 2009

merb-helpers merb-cache
merb-mailer merb-assets
merb-slices merb-action-args
merb-core
merb-param-protection merb-exceptions
merb-auth-core merb-auth-more
merb-auth-slice-password
Thursday, February 5, 2009

ActionController::Base ActionMailer::Base
Thursday, February 5, 2009

Merb::AbstractController
Merb::Controller Merb::MailController
Thursday, February 5, 2009

Plugins
Thursday, February 5, 2009

Gems
Thursday, February 5, 2009

Rails << Merb
Thursday, February 5, 2009

rails-core
Thursday, February 5, 2009

Rails 3
ORM Pick one!
Test framework Don’t care!
Template language Your choice!
JS framework Whatever!
Thursday, February 5, 2009

Rails 3
ORM Pick one!
Test framework Don’t care!
Template language Your choice!
JS framework Whatever!
Thursday, February 5, 2009

Rails 3
ORM Pick one!
Agnosticism!
Test framework Don’t care!
Template language Your choice!
JS framework Whatever!
Thursday, February 5, 2009

Public
API
With tests to ensure it doesn’t
magically change overtime!
Thursday, February 5, 2009

DataMapper
Thursday, February 5, 2009

SELECT * FROM persons WHERE country = 'NL'
Thursday, February 5, 2009

SELECT * FROM persons WHERE country = 'NL'
AR: Person.find(:all, :conditions => [\"country = ?\", \"NL\"])
Thursday, February 5, 2009

SELECT * FROM persons WHERE country = 'NL'
AR: Person.find(:all, :conditions => [\"country = ?\", \"NL\"])
DM: Person.all(:country => \"NL\")
Thursday, February 5, 2009

SELECT * FROM persons WHERE age BETWEEN 18
AND 21 ORDER BY AGE DESC
Thursday, February 5, 2009

SELECT * FROM persons WHERE age BETWEEN 18
AND 21 ORDER BY AGE DESC
AR: Person.find(:all, :conditions => [\"age BETWEEN ? AND ?\", 18,
21], :order => \"age DESC\") # => :( SQL fragments!
Thursday, February 5, 2009

SELECT * FROM persons WHERE age BETWEEN 18
AND 21 ORDER BY AGE DESC
AR: Person.find(:all, :conditions => [\"age BETWEEN ? AND ?\", 18,
21], :order => \"age DESC\") # => :( SQL fragments!
DM: Person.all(:age.gt => 18, :age.lt => 21, :order => [:age.desc])
Thursday, February 5, 2009

Nice: “strategic eager loading”
100 zoos; 250 exhibits
zoos = Zoo.all
zoos.each do |zoo|
zoo.exhibits.each do |exhibit|
puts \"Zoo: #{zoo.name}, Exhibit: #{exhibit.name}\"
end
end
Queries
ActiveRecord
DataMapper
Thursday, February 5, 2009

Nice: “strategic eager loading”
100 zoos; 250 exhibits
zoos = Zoo.all
zoos.each do |zoo|
zoo.exhibits.each do |exhibit|
puts \"Zoo: #{zoo.name}, Exhibit: #{exhibit.name}\"
end
end
Queries
101
ActiveRecord
DataMapper
Thursday, February 5, 2009

Nice: “strategic eager loading”
100 zoos; 250 exhibits
zoos = Zoo.all
zoos.each do |zoo|
zoo.exhibits.each do |exhibit|
puts \"Zoo: #{zoo.name}, Exhibit: #{exhibit.name}\"
end
end
Queries
101
ActiveRecord
2
DataMapper
Thursday, February 5, 2009

Associations
class Zoo
include DataMapper::Resource
class Zoo < ActiveRecord::Base
belongs_to :owner belongs_to :owner
has 1, :cafetaria has_one :cafetaria
has n, :animals has_many :animals
has n, :donors, :through => Resource has_and_belongs_to_many :donors
has n, :zookeepers, :through => :agencies has_many :zookeepers, :through => :agencies
end end
Thursday, February 5, 2009