Hardcore Extending Rails 3 - From RailsConf '10

Hardcore!

Tuesday, June 15, 2010

- Dave Thomas


Duck Typing
"when I see a bird that walks like a duck and swims like a
duck and quacks like a duck, I call that bird a duck."


Rails 2


I started exploring
alternatives to Rails


HISS!!!
jason seifer
YouTube search: rails vs. django


December 23rd, 2008


+ =

RAILS 3


What makes
Rails 3 amazing?
(and why did it take so long?)


“THE GREAT
DECOUPLING”


Core components
are easily customizable.


Core components
are easily replaceable.

OO

LET’S EXPLORE
SOME RAILS CORE
FOR THE SAKE OF KNOWING!


THE RAILS STACK

Network

Rack

Railties

ActionDispatch

ActionController

ActionView ActiveModel


LET’S DO
USELESS THINGS


Take this code with
a grain of salt


Let’s write a useless
DSL for our views.
WRITING A TEMPLATE HANDLER


WRITING A TEMPLATE HANDLER


WHAT ACTION VIEW EXPECTS


MAKING THE DSL


my_cool_dsl.rb


my_cool_handler.rb


views/hello/index.cool


http://localhost:3000/hello


Let’s accept useless
connections.
WRITING A “TELNET SERVER”


A simple way.
ACT LIKE A RACK SERVER


TALK LIKE A RACK SERVER

telnet_server.rb


z

my_cool_dsl.rb


CONSISTENCY!


hello_controller.rb views/hello/index.cool

via telnet via browser


Let’s make this
uselessness
conﬁgurable.
WORKING WITH RAILTIES


WHAT IS A RAILTIE?
The interface between the
Rails framework and its components


WHAT CAN YOUR RAILTIE DO?

• Allow you to accept conﬁguration from application.rb
• Set up initializers in your extension’s context
• Tell Rails about generators and rake tasks
• Build engines, plugins, and applications

Engines, plugins, and applications
are all subclasses of Railtie in
Rails 3


Organized!


railtie.rb


lib/super_cool/view_dsl.rb


conﬁg/application.rb


Results!


Let’s let others be just
as useless.
MAKING THIS A
DISTRIBUTABLE FRAMEWORK


ANATOMY OF OUR GEM


package it with the usual tools...


IRC bot framework
Modular enterprise app

FOOD FOR THOUGHT
MUD game framework
Modular view system

A pluggable admin panel


RESOURCES

http://github.com/rails/rails
bundle open rails
bundle open actionpack
bundle open ... etc ...
http://railsapi.com/


RAILS CODE IS GOOD CODE


RAILS CODE IS REUSABLE CODE


And the more use cases you ﬁnd
for customizing Rails 3 internals,
the better they will be written
in the future


Be inspired to look where
you might’ve not looked before

and learn!


Thanks!

twitter @digx
+
rick.martinez@gmail.com


Hardcore Extending Rails 3 - From RailsConf '10

Recommended

Recommended

More Related Content

Similar to Hardcore Extending Rails 3 - From RailsConf '10

Similar to Hardcore Extending Rails 3 - From RailsConf '10 (20)

Recently uploaded

Recently uploaded (20)

Hardcore Extending Rails 3 - From RailsConf '10