The document discusses Ruby gems and plugins. It provides an overview of what gems are, how the RubyGems package manager works to distribute and install gems, and some of the benefits of using gems. It then profiles several popular gems, describing their functionality and how they can be used. These include gems for authentication, pagination, file attachments, testing, scheduling tasks, and more. Lastly, it lists the authors of some "über-gems" and provides brief biographies.

1. GEMS / PLUGINS
Интересно, полезно, весело

2. Что такое джемс?
RubyGems (rubygems.org) — пакетный
менеджер для руби
Единый формат распространения отдельных
программ и библиотек
Программа для установки библиотек (джемс)
Сервер для распространения джемс

3. Преимущества джемс
require ‘rubygems’
require ‘gemname’
sudo gem update
Отсутствие централизации
Стандартный формат: 8300 джемс на
Rubyforge, 7400 джемс на Github

4. Github
125000 пользователей
100000 проектов
gists
GitHub Pages

5. restful-authentication
(technoweenie)
./script/generate authenticated user sessions
map.signup ‘/signup’,
:controller => ‘users’, :action => ‘new’
map.login ‘/login’,
:controller => ‘session’, :action => ‘new’
map.logout ‘/logout’,
:controller => ‘session’, :action => ‘destroy’

6. authlogic (binarylogic)
class UserSession < Authlogic::Session::Base
# specify configuration here, such as:
# logout_on_timeout true
# ...many more options in the documentation
end
UserSession.create(:login => "john",
:password => "my password",
:remember_me => true)
session.destroy

7. will_paginate (mislav)
Post.paginate :page => 1,
:order => 'created_at DESC'
@posts = Post.paginate_by_board_id
@board.id,
:page => params[:page],
:order => 'updated_at DESC'
<%= will_paginate @posts %>

8. paperclip (thoughtbot)
class User < ActiveRecord::Base
has_attached_file :avatar,
:styles => {
:medium => "300x300>",
:thumb => "100x100>" }
end
<%= image_tag @user.avatar.url %>
<%= image_tag @user.avatar.url(:medium) %>
<%= image_tag @user.avatar.url(:thumb) %>

9. cucumber (aslakhellesoy)
Feature: Addition
In order to avoid silly mistakes
As a math idiot
I want to be told the sum of two numbers
Scenario: Add two numbers
Given I visit the calculator page
And I fill in '50' for 'first'
And I fill in '70' for 'second'
When I press 'Add'
Then I should see 'Answer: 120'

10. cucumber (cont’d)
Given /^I visit the calculator page$/ do
visit '/add'
end
Given /^I fill in '(.*)' for '(.*)'$/ do |value, field|
fill_in(field, :with => value)
end
When /^I press '(.*)'$/ do |name|
click_button(name)
end
Then /^I should see '(.*)'$/ do |text|
response_body.should contain(/#{text}/m)
end

11. attachment_fu (technoweenie)
has_attachment
:size => 1.megabyte..2.megabytes
has_attachment
:content_type => 'application/pdf'
has_attachment
:store => :s3, :cloudfront => true
attachment_obj.public_filename
#=> /attachments/2/file.jpg
attachment_obj.public_filename(:thumb)
#=> /attachments/2/file_thumb.jpg

12. webrat (brynary)
visit home_path
click_link "Sign up"
fill_in "Email", :with => "good@example.com"
select "Free account"
click_button "Register"

13. bort (fudgestudios)
default css
rm rails.png/index.html
page title helper
application layout
filtering password /password_confirmation
database for sessions
capistrano for git/passenger
plugins (RESTful authentication, role requirement, Open ID authentication,
will_paginate, rspec/rspec-rails, exception notifier, asset packager)

14. whenever (javan)
wheneverize .
every 3.hours do
runner "MyModel.some_process"
rake "my:rake:task"
end
every 1.day, :at => '4:30 am' do
command "/usr/bin/my_great_command"
end
whenever --update-crontab

15. formtastic (justinfrench)
<% semantic_form_for @article do |form| %>
<% form.inputs :name => "Basic" do %>
<%= form.input :title %>
<%= form.input :publication_state, :as => :radio %>
<%= form.input :allow_comments, :label => "Allow commenting on this article" %>
<% end %>`
<% form.inputs :name => "Advanced" do %>
<%= form.input :keywords, :required => false, :hint => "Example: ruby, rails, forms"
%>
<% end %>
<% form.inputs :name => "Author", :for => :author do |author_form| %>
<%= author_form.input :first_name %>
<%= author_form.input :last_name %>
<% end %>
<% form.buttons do %>
<%= form.commit_button %>
<% end %>
<% end %>

16. delayed_job (tobi)
create_table :delayed_jobs, :force => true do |table|
table.integer :priority, :default => 0 #Allows some jobs to jump to the front of the queue
table.integer :attempts, :default => 0 #Provides for retries, but still fail eventually.
table.text :handler #YAML-encoded string of the object that will do work
table.string :last_error #reason for last failure (See Note below)
table.datetime :run_at #When to run. Could be Time.now for immediately, or sometime in the future.
table.datetime :locked_at #Set when a client is working on this object
table.datetime :failed_at #Set when all retries have failed (actually, by default, the record is
deleted instead)
table.string :locked_by #Who is working on this object (if locked)
table.timestamps
end
MyJob#perform

17. haml (Hampton Caitlin)
%ul
%li Salt
%li Pepper
%p
Date/Time:
- now = DateTime.now
%strong= now
- if now > DateTime.parse("December 31, 2006")
= "Happy new " + "year!"
!main_bg= #46ar12
!main_width= 40em
#main
background-color = !main_bg
width = !main_width
.sidebar
background-color = !main_bg + #333333
width = !main_width - 25em

18. searchlogic (binarylogic)
User.username_equals("bjohnson")
User.username_does_not_equal("bjohnson")
User.username_begins_with("bjohnson")
User.username_not_begin_with("bjohnson")
User.username_like("bjohnson")
User.username_ends_with("bjohnson")
User.age_greater_than(20)
User.age_greater_than_or_equal_to(20)
User.username_null
User.username_not_null
User.username_blank

19. searchlogic (cont’d)
User.username_eq(10) # equals
User.id_lt(10) # less than
User.id_lte(10) # less than or equal to
User.id_gt(10) # greater than
User.id_gte(10) # greater than or equal to
User.orders_total_greater_than(20)
User.orders_line_items_price_greater_than(20)
User.ascend_by_order_total
User.descend_by_orders_line_items_price
User.username_like_all("bjohnson", "thunt") #will return any users that have all of the strings in their username
User.username_like_any(["bjohnson", "thunt"]) #also accepts an array
User.username_or_first_name_like("ben")
User.id_or_age_lt_or_username_or_first_name_begins_with(10)
search = User.search(:username_like => "bjohnson", :age_less_than => 20)
User.named_scope :four_year_olds, :conditions => {:age => 4}
User.search(:four_year_olds => true, :username_like => "bjohnson")
User.username_like("bjohnson").age_less_than(20).paginate(:page => params[:page])
User.search(:username_like => "bjohnson", :age_less_than => 20).paginate(:page =>
params[:page])
User.searchlogic

20. Автора ÿбер-джемсов
Technoweenie — Рик Fudgestudios — Фил
Олсон, ENTP Джеффс, fudgestudios
Binarylogic — Бен Javan — Джаван Махмали,
Джонсон, Binary Logic Inkling Markets
Mislav — Мислав Justinfrench — Джастин
Марохнич, Uniqpath Френч, Indent
Aslakhellesoy — Аслак Tobi — Тобиас Лютке,
Хеллесёй, BEKK Consulting JadedPixel
Brynary — Брайан hampton — Хэмптон
Хелмкамп, weplay Кейтлин

21. Спасибо!
apostlion@gmail.com
@apostlion