Пак ли този Rails?

Пак ли този ?

Стефан Къневhttp://skanev.com/@skanev

OpenFest07 ноември 2009

Tuesday, April 27, 2010

http://skanev.com

http://skanev.com




Аз ползвамWindows 7






http://skanev.com

http://skanev.com




Защо "пак"?


http://skanev.com

http://skanev.com


2 причини


Причина №1

❤


Java PHP Python Haskell Rails Lolcats

Продуктивност "Фън"


• CakePHP

• CodeIgniter

• "чисто" PHP

PHP• Catalyst

• "чист" Perl

Perl

• Django

• TurboGears

Python• Servlet & JSP

• Struts (+ Hibernate)

• Wicket (+ Spring)

• JSF

Java


Причина №2

...по-късноTuesday, April 27, 2010

За какво ще говоря?


Introduction


1. За Rails накратко

2. Няколко интересни неща

3. Обществото около Rails

Планът





Планът


Ruby on Rails

Език запрограмиране

Web framework


duck typing

динамичен

обектно-ориентиран

интерпретира сеgeneral purpose

ала Perl и Python


ModelViewController


Rails е...

...като:• CakePHP• CodeIgniter• Struts• Catalyst• TurboGears

...различен от:• Wicket• Google Web Tookit• Java Server Faces

Django


agile





Планът


2. Малки интересни неща

• Конзола


>> a, b = 2, 8=> [2, 8]>> a ** b=> 256>> ["Interactive", "shell"].join(" ")=> "Interactive shell"


>> u = User.find_by_email '[email protected]'>> u.password = 'larodi'>> u.password_confirmation = 'larodi'>> u.save


начин да научите rails


server debugging



• Конзола• Debugger




• HAML


<h1>Cheese</h1><ul id="cheese"> <li>Red Leicester</li> <li class="selected">Lancashire</li> <li>Danish Blue</li> <li>Gouda</li></ul>

HTML



%h1 Cheese%ul#cheese %li Red Leicester %li.selected Lancashire %li Danish Blue %li Gouda

HTML

HAML


OMG! Супер!


OMG! Ужас!



%h1 Cheese%ul#cheese %li Red Leicester %li.selected Lancashire %li Danish Blue %li Gouda

HTML

HAML


<h1>Cheese</h1><% unless @cheese.empty? %> <ul id="cheese"> <% @cheese.each do |name| %> <li><%= name %></li> <% end %> </ul><% else %> <p>Sorry sir, we don't have any cheese.</p><% end %>

ERB


%h1 Cheese- unless @cheese.empty? %ul#cheese - @cheese.each do |name| %li= name- else %p Sorry sir, we don't have any cheese

<h1>Cheese</h1><% unless @cheese.empty? %> <ul id="cheese"> <% @cheese.each do |name| %> <li><%= name %></li> <% end %> </ul><% else %> <p>Sorry sir, we don't have any cheese.</p><% end %>

ERB

HAML




• HAML

• SASS


h1 { height: 118px; margin-top: 1em;}

.tagline { font-size: 26px; text-align: right;}

h1 height: 118px margin-top: 1em

.tagline font-size: 26px text-align: right

SASS CSS

Прост пример


SASS CSS

Влагане

table.hl margin: 2em 0 td.ln text-align: right

li font: family: serif weight: bold size: 1.2em

table.hl { margin: 2em 0;}table.hl td.ln { text-align: right;}

li { font-family: serif; font-weight: bold; font-size: 1.2em;}


SASS CSS

Константи

!blue = #3bbfce!margin = 16px

.content_navigation border-color = !blue color = !blue - #111

.border padding = !margin / 2 margin = !margin / 2 border-color = !blue

.content_navigation { border-color: #3bbfce; color: #2aaebd;}

.border { padding: 8px; margin: 8px; border-color: #3bbfce;}


SASS CSS

Mix-ins

=rounded-corners(!size) -moz-border-radius = !size -webkit-border-radius = !size border-radius = !size

#data +rounded-corners(5px)

#data { -moz-border-radius: 5px; -webkit-border-radius: 5px; border-radius: 5px;}


http://lesscss.org/


http://lesscss.org

http://lesscss.org



• HAML

• SASS

•Миграции


schema.sql


@Entityclass User { @Basic String name; @Basic int age; @ManyToOne City city;}

Автоматични промени


id title category_name

1 Dune Fiction

2 War & Peace Drama

3 Lord of the Rings Fiction

id title category_id

1 Dune 1

2 War & Peace 2

3 Lord of the Rings 1

id name

1 Fiction

2 Drama


class NormalizeCategories < ActiveRecord::Migration def self.up create_table :categories do |t| t.string :name end add_column :books, :category_id, :integer Book.all.each do |book| category = Category.find_or_create_by_name book.category_name book.category_id = category.id book.save! end drop_column :categories, :category_name endend




• HAML

• SASS

•Миграции• Webrat


Selenium


1. труден за поддръжка


2. бавен


Webrat


fill_in "Сума", :with => '1000'fill_in "Данък", :with => "20%"click_button "Изчисли"response.should include_text("1200 лв")




• HAML

• SASS


• Cucumber


business domain


business analyst


use casesuser stories


Feature: Purchasing things In order for us to make money the user should be allowed to easily purchase our products Scenario: Purchases for more than 2500 should offer 20% Given there are these products: | Name | Price | | MacBook Pro | 2000 | | ThinkPad | 1000 | When I add 1 "MacBook Pro" to my basket And I add 1 "ThinkPad" to my basket Then the final price should be 2600



Изпълнимо


Given /^there are these products$/ do |table| ...end

When /^I add (\d+) "(.*?)" to my basket$/ do |count, name| ...end

Then /^the final price should be (\d+)$/ do |price| ...end




Функционалност: Купуване на продукти За да печелим пари потребителят трябва да може лесно да пазарува продукти Сценарий: Поръчките за повече от 2000 трябва да имат 20% отстъпка Дадено че има следните три продукта: | Име | Price | | MacBook Air | 2000 | | ThinkPad | 1000 | Когато добавя 1 "MacBook Air" в кошницата си И добавя 2 "ThinkPad" в кошницата си То цената трябва да е 2600

Краставицата ми говори български


OH HAI: I CAN BAI STUFF SO WE CAN HAZ MONEYZ N00BZ SHOULD BAI STUFF MISHUN: BAI STUFF CHEAPER I CAN HAS CHEEZEBURGERS: | NAME | MONEYZ | | MacBook Air | 2000 | | ThinkPad | 1000 | WEN I AD 1 "MacBook Air" TO MAI BASKET AN I AD 1 "ThinkPad" TO MAI BASKET DEN I SHOULD PAY 2600

Краставицата ми говори lolspeak




• HAML

• SASS


• Cucumber

• Test-Driven


unit teststest-driven development


behavior-driven development


Test-Driven Development is not about testing.



ruby е гъвкав:

stubs & mocks





Планът


хората


jQuery


Yehuda Katz


Yehuda Katz

jQuery Rails 3Tuesday, April 27, 2010

JavaScript


prototype.js


Rails is about less code.- David Heinemeier Hansson




много колоритни хора


Giles Bowkett


_why the lucky stiff


Zed ShawTuesday, April 27, 2010

Има и компании




блогове



Екосистема


Най-хубавото нещо:

Общността


Отворен (OS) модел за:

кодметодипринципи


?Tuesday, April 27, 2010

http://skanev.com/@skanev


http://skanev.com

http://skanev.com

The happy programmer 2

Nikolay Bachiyski&

Stefan Kanev

Sunday, 10:00, OpenFest


Пак ли този Rails?

Technology

h1 cheese

px margin

px bordercolor

li danish blue

size borderradius

blue color

li red leicester

border padding