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- 1. RUBY and Rails BrisbaneRails.com
- 2. Agenda Background Ruby 101 Why Ruby Interactive Demo Ruby Community Rails Environments Fundamentals Gems Build sample app BrisbaneRails.com
- 3. Nigel Rausch @nr99 http://au.linkedin.com/in/nigelrausch nigelr@brisbanerails.com BrisbaneRails.com
- 4. PHP Years BrisbaneRails.com
- 5. PHP Years 1997 - 2003 BrisbaneRails.com
- 6. PHP Years 1997 - 2003 Developed own framework BrisbaneRails.com
- 7. PHP Years 1997 - 2003 Developed own framework ISP Management ( > $2.5M ) BrisbaneRails.com
- 8. PHP Years 1997 - 2003 Developed own framework ISP Management ( > $2.5M ) Semi Retired in 2003 BrisbaneRails.com
- 9. Got Bored BrisbaneRails.com
- 10. Got Bored Back to code in 2005 BrisbaneRails.com
- 11. Got Bored Back to code in 2005 PHP didn’t do it for me BrisbaneRails.com
- 12. Got Bored Back to code in 2005 PHP didn’t do it for me Ruby on Rails (what weird name) BrisbaneRails.com
- 13. Got Bored Back to code in 2005 PHP didn’t do it for me Ruby on Rails (what weird name) Considered PHP equivalents BrisbaneRails.com
- 14. Ruby on Rails Started Rails 1 Considered PHP frameworks BrisbaneRails.com
- 15. Why Ruby BrisbaneRails.com
- 16. Why Ruby BrisbaneRails.com
- 17. Why Ruby BrisbaneRails.com
- 18. More Why Ruby echo $this->Html->link($post['Post']['title'], array('controller' => 'posts', 'action' => 'view', $post['Post']['id'])); BrisbaneRails.com
- 19. More Why Ruby echo $this->Html->link($post['Post']['title'], array('controller' => 'posts', 'action' => 'view', $post['Post']['id'])); link_to post.title, :controller => “posts”, :action => “view”, :id => post.id BrisbaneRails.com
- 20. More Why Ruby echo $this->Html->link($post['Post']['title'], array('controller' => 'posts', 'action' => 'view', $post['Post']['id'])); link_to post.title, :controller => “posts”, :action => “view”, :id => post.id link_to post.title, post_path(post) BrisbaneRails.com
- 21. More Why Ruby echo $this->Html->link($post['Post']['title'], array('controller' => 'posts', 'action' => 'view', $post['Post']['id'])); link_to post.title, :controller => “posts”, :action => “view”, :id => post.id link_to post.title, post_path(post) link_to post.title, post BrisbaneRails.com
- 22. Why Rails Ruby is descriptive clean language Latest concepts Migrations BrisbaneRails.com
- 23. What’s Rails Rails is built on Ruby Rails is a framework Rails adds lots of DSLs and extra methods to Ruby Rails uses some of the advanced features of Ruby to hide the complicated stuff BrisbaneRails.com
- 24. Community Ruby and Rails community is strong & supportive! Approx. 20 conferences a year US, Ireland, Japan, Singapore, ...... Very Active IRC Very active development BrisbaneRails.com
- 25. Brisbane Ruby & Rails Meetup www.meetup.com/brisbane-ruby-rails/ BrisbaneRails.com
- 26. RailsCamp Bi-Annual event in Australia Now in NZ, Europe and US Starts Friday afternoon What happens at Railscamp stays....... End Monday morning BrisbaneRails.com
- 27. RAILSCAMPs 100+ Ruby Devs BrisbaneRails.com
- 29. Next RailsCamp is June, 15th BrisbaneRails.com
- 30. Local Activities ActionHack 1st Saturday http://www.meetup.com/BrisJelly BrisbaneRails.com
- 31. Work Opportunities Ruby on Rails developers are in high demand $60K - $120+K (more overseas) $600 - $1200/day freelance Melbourne & Sydney highest demand BrisbaneRails.com
- 32. Perception of Ruby Community BrisbaneRails.com
- 33. Ruby Perception Cult status Sacrifice goats in the search for clean code BrisbaneRails.com
- 34. Ruby Perception (Actual) Very supportive community Very opinionated community Very sharing (gems/code/blogs) Very quality conscious Majority devs do TDD/BDD BrisbaneRails.com
- 35. Environments Mac Installed Windows New installers Linux Easy BrisbaneRails.com
- 36. Rubies Implementations Ruby MRI REE JRuby Rubinius IronRuby MacRuby BrisbaneRails.com
- 37. RVM Ruby Version Manager Allows multiple implementations Allows multiple versions of implementations Easy swap around and gem management BrisbaneRails.com
- 38. Server BEFORE fast-cgi with reverse proxies NOW Passenger (mod rails) heroku.com BrisbaneRails.com
- 39. Real World Web Apps American Yellow Pages Twitter Hulu Slideshare github Redbubble IPHONE APIS BrisbaneRails.com
- 40. Tools Capistrano Cucumber Rspec AutoTest BrisbaneRails.com
- 41. Gems RubyGems is a package manager for the Ruby programming language that provides a standard format for distributing Ruby programs and libraries (in a self-contained format called a "gem"), a tool designed to easily manage the installation of gems, and a server for distributing them. BrisbaneRails.com
- 45. IRB BrisbaneRails.com
- 46. Ruby 101 BrisbaneRails.com
- 47. Interpreted Ruby No compilation Interactive Mode > ruby app.rb > irb BrisbaneRails.com
- 48. No Type Casting Ruby No Type declarations value = 1 puts value -> 1 value = “hello” puts value -> “hello” BrisbaneRails.com
- 49. Everything is an object Ruby puts 99.class -> Fixnum puts “hello”.class -> String puts nil.class -> NilClass BrisbaneRails.com
- 50. Skip parenthesis Ruby Most of the time Easier to read puts “hello” DSL friendly puts(“hello”) BrisbaneRails.com
- 51. Variables Ruby Constant Local VAR = “constant” Instance var = “local” @var = “instance” Class @@var = “class” $var = “smelly” Global BrisbaneRails.com
- 52. Naming Conventions Ruby underscore separated - variables and methods full_name All Caps - constants SERVER_ID CamelCase for classes ActiveRecord BrisbaneRails.com
- 53. Basic Data Types Ruby Numbers Strings Arrays Hashes Symbols true, false, nil BrisbaneRails.com
- 54. Numbers Ruby Integer Float 5 / 3 -> 1 Autoconversion 5.0 / 3 -> 1.66666.... 5 / 3.0 -> 1.66666.... BrisbaneRails.com
- 55. Arrays Ruby 0 indexed arrays var = [ 1, 2, 3] var[1] -> 2 var << 4 -> [ 1, 2, 3, 4] nested = [ [1, 2], 3] BrisbaneRails.com
- 56. Hashes Ruby Ordered named arrays var = {:name => “Fred”, “age” => 21} puts var[:name] -> “Fred” puts var[“name”] -> nil puts var[“age”] -> 21 Ruby 1.9.x { name: “Fred”, age: 21 } BrisbaneRails.com
- 57. Symbols Ruby Identifier Not assignable {:password => “secret”} Mainly used in hashes :password = 42 (invalid) var = :password puts var -> :password BrisbaneRails.com
- 58. true, false, nil Ruby good = true bad = false unknown = nil BrisbaneRails.com
- 59. falsies Ruby nil and false everything else is true var = 0 0 => true if var puts “hello” “0” => true end “” => true -> “hello” BrisbaneRails.com
- 60. Assignment Ruby value = “hello” a = 10 a += 1 => 11 b ||= 10 => 10 b ||= 500 => 10 BrisbaneRails.com
- 61. Conditions Ruby If statement if name == “Fred” Unless (invert) put “Hello, Fred” end var = false if var puts “never seen” end unless var puts “always seen” end BrisbaneRails.com
- 62. Conditions Ruby Single line conditions var = true puts “shown” if var puts “hide” unless var puts “I win” if score > 11 BrisbaneRails.com
- 63. Methods Ruby def say_hello puts “hello” end say_hello -> “hello” def my_name_is name “my name is “ + name end puts my_name_is “Fred” -> “my name is Fred” BrisbaneRails.com
- 64. Classes Ruby Class MyThing def initialize name @name = name end attr_accessor :name, :age def something name + “ is “ + age + “years old” end end a = MyThing.new “Fred” puts a.name a.age = 42 puts a.something -> “Fred is 42 years old” BrisbaneRails.com
- 65. Iterator and blocks Ruby 5.times do puts “Nice for-loop, eh?” end 5.times { puts “One-liner block form” } (1..3).each do |n| puts “Say hello to number #{n}!” end [1,2,3].map { |n| n * 2 } -> [2, 4, 6] BrisbaneRails.com
- 66. Iterators Ruby items = [“good”, “great”, “superb”] BrisbaneRails.com
- 67. Iterators Ruby items = [“good”, “great”, “superb”] for item in items puts item end BrisbaneRails.com
- 68. Iterators Ruby items = [“good”, “great”, “superb”] for item in items puts item end items.each do |item| puts item end BrisbaneRails.com
- 69. Iterators Ruby items = [“good”, “great”, “superb”] for item in items puts item end items.each do |item| puts item end items.each { |item| puts item } BrisbaneRails.com
- 70. Iterator - Map Ruby items = [“good”, “great”, “superb”] build = [] items.each do |item| build << item.upcase end build = items.map do |item| item.upcase end BrisbaneRails.com
- 71. Iterator - select Ruby items = [“good”, “great”, “superb”] items.select do |item| item.include? “e” end -> [“great”, “superb”] BrisbaneRails.com
- 72. Blocks Ruby def say_something yield yield yield end say_something { puts "Hello" } Hello Hello Hello BrisbaneRails.com
- 73. Testing Ruby require 'test/unit' def my_name_is name “my name is “ + name end class TestIt < Test::Unit::TestCase def test_it assert_equal "my name is Fred", my_name_is “Fred" end end BrisbaneRails.com
- 74. Testing - RSpec Ruby require 'rspec' def greeting name “my name is “ + name end describe Greeting it “should return message with name” do greeting.should == "my name is Fred” end end BrisbaneRails.com
- 75. Demo and Break BrisbaneRails.com
- 76. Ruby on Rails BrisbaneRails.com
- 77. Ruby on Rails BrisbaneRails.com
- 78. Ruby on Rails Convention over configuration BrisbaneRails.com
- 79. Ruby on Rails Convention over configuration DRY - Don’t Repeat Yourself BrisbaneRails.com
- 80. Ruby on Rails Convention over configuration DRY - Don’t Repeat Yourself MVC - Model View Controller BrisbaneRails.com
- 81. Ruby on Rails Convention over configuration DRY - Don’t Repeat Yourself MVC - Model View Controller ORM - Object Relation Mapping BrisbaneRails.com
- 82. Ruby on Rails Convention over configuration DRY - Don’t Repeat Yourself MVC - Model View Controller ORM - Object Relation Mapping Migrations BrisbaneRails.com
- 83. Ruby on Rails Convention over configuration DRY - Don’t Repeat Yourself MVC - Model View Controller ORM - Object Relation Mapping Migrations Restful BrisbaneRails.com
- 84. Convention over Configuration Consistent Structure Naming conventions Controller names -> Model names Model names -> table names BrisbaneRails.com
- 85. Don’t Repeat Yourself DRY One copy of a method Re-usable methods partial forms BrisbaneRails.com
- 86. Model View Controller MVC 1979 concept Controller manages action Model connects to DB Views separated from logic Router BrisbaneRails.com
- 87. Controller Rails class CompaniesController < ApplicationController def index @companies = Company.all end def show @company = Company.find(params[:id]) end def new @company = Company.new end def create @company = Company.new(params[:company]) if @company.save redirect_to @company, :notice => "Successfully created company." else render :action => 'new' end end BrisbaneRails.com
- 88. View - Index Rails <table> <tr> <th>Name</th> <th>Website</th> </tr> <% for company in @companies %> <tr> <td><%= company.name %></td> <td><%= company.website %></td> <td><%= link_to "Show", company %></td> <td><%= link_to "Edit", edit_company_path(company) %></td> <td><%= link_to "Destroy", company, :confirm => 'Are you . </tr> <% end %> </table> <p><%= link_to "New Company", new_company_path %></p> BrisbaneRails.com
- 89. View - Index .haml Rails %table %tr %th Name %th Website - for company in @companies %tr %td= company.name %td= company.website %td= link_to "Show", company %td= link_to "Edit", edit_company_path(company) %td= link_to "Destroy", company, :confirm => 'Are you ... %p = link_to "New Company", new_company_path BrisbaneRails.com
- 90. View - Form Rails <%= form_for @company do |f| %> <%= f.error_messages %> <p> <%= f.label :name %><br /> <%= f.text_field :name %> </p> <p> <%= f.label :website %><br /> <%= f.text_field :website %> </p> <p><%= f.submit %></p> <% end %> BrisbaneRails.com
- 91. Model Rails class Company < ActiveRecord::Base attr_accessible :name, :website has_many :contacts end BrisbaneRails.com
- 92. What’s ORM Object-Relational mapping is a programming technique for converting data between incompatible type systems in databases and object-oriented programming languages Source: wikipedia BrisbaneRails.com
- 93. Quick Example #1 select * from companies where id = 12 item = Company.find(12) BrisbaneRails.com
- 94. Quick Example #2 select * from companies where name = “Logical” item = Company.find_by_name(“Logical”) OR Item = Company.where(:name=>”Logical”) BrisbaneRails.com
- 95. Quick Example #3 update companies set name = “Logical Plus” where id = 12 item=Company.find(12) item.name = “Logical Plus” item.save OR Company.find(12).update_attributes(:name=>”Logical Plus”) BrisbaneRails.com
- 96. Quick Example #4 insert into companies (name, postcode) values (“Logical”, 4121) item=Company.new item.name = “Logical” item.postcode = 4121 item.save OR Company.create(:name=>”Logical”, :postcode=>4121) BrisbaneRails.com
- 97. Model class Company < ActiveRecord::Base has_many :contacts has_many :invoices end class Contact < ActiveRecord::Base belongs_to :company has_many :invoices end class Invoice < ActiveRecord::Base has_many :invoice_items belongs_to :company belongs_to :contact end class InvoiceItem < ActiveRecord::Base belongs_to :invoice end BrisbaneRails.com
- 98. Migrations create and modify table and fields from within code base Easy deployment Reversible BrisbaneRails.com
- 99. Restful Representational State Transfer Concept of Resources 7 Resources index, show, edit, update, new, create, destroy HTTP verbs (get, put, post, delete) BrisbaneRails.com
- 100. Rails Routes companies_path GET /companies(.:format) :action=>"index” company_path GET /companies/:id(.:format) :action=>"show" new_company_path GET /companies/new(.:format) :action=>"new" POST /companies(.:format) :action=>"create" edit_company_path GET /companies/:id/edit(.:format) :action=>"edit" PUT /companies/:id(.:format) :action=>"update" DELETE /companies/:id(.:format) :action=>"destroy" BrisbaneRails.com
- 101. Preparation BrisbaneRails.com
- 102. Confirm Environment ruby -v gem -v rails -v BrisbaneRails.com
- 103. Rails Generation rails new my_app_name cd my_app_name rails generate ...... rails console BrisbaneRails.com
- 104. Let’s go build something! BrisbaneRails.com
- 105. Nigel Rausch Thank you @nr99 http://au.linkedin.com/in/nigelrausch nigelr@brisbanerails.com BrisbaneRails.com
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- Basic, Assembly, C programmer\nThen the webdev came along\n\n- PHP\n - ISP Mgnt (millions)\n - Credit Card\n\n\n
- Basic, Assembly, C programmer\nThen the webdev came along\n\n- PHP\n - ISP Mgnt (millions)\n - Credit Card\n\n\n
- Basic, Assembly, C programmer\nThen the webdev came along\n\n- PHP\n - ISP Mgnt (millions)\n - Credit Card\n\n\n
- Basic, Assembly, C programmer\nThen the webdev came along\n\n- PHP\n - ISP Mgnt (millions)\n - Credit Card\n\n\n
- The feeling was gone.... So started looking at alternatives\n
- The feeling was gone.... So started looking at alternatives\n
- The feeling was gone.... So started looking at alternatives\n
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- Less code the easier to read \nless errors\n
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