Ruby On Rails Intro
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This document provides an overview of Ruby and Ruby on Rails. It discusses that Ruby is a dynamic, object-oriented programming language and Rails is a web application framework built on Ruby. It also summarizes key aspects of Rails like Active Record for managing database access and interactions, the MVC framework and conventions, and testing practices like test-driven development.
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Ruby On Rails Intro
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- 3. Ruby is a language. Rails is a framework. netguru.co
- 4. Ruby is a dynamic, scripting, object-oriented language... netguru.co
- 5. netguru.co
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- 11. :014 > 1.class => Fixnum :015 > (2.2).class => Float :016 > [].class => Array :017 > "AKAI".class => String :018 > nil.class => NilClass :019 > “abc” + “d” => “abcd” netguru.co
- 15. Ruby is open. Ruby is people. ..so is Rails. netguru.co
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- 20. What is the most popular Ruby gem? netguru.co
- 24. netguru.co 1. What is Active Record? 2. Convention over Configuration 3. Active Record Models 4. CRUD MVC
- 25. netguru.co 1. What is Active Record? 2. Convention over Configuration 3. Active Record Models 4. CRUD
- 26. netguru.co 1. What is Active Record? 2. Convention over Configuration 3. Active Record Models 4. CRUD class Post < ActiveRecord::Base belongs_to :user end class User < ActiveRecord::Base has_many :posts end :001 > user = User.find(2) => #<User id: 2, name: ‘Blazej’> :002 > user.posts => [#<Post id: 1, title: ‘abc’>, user_id: 2>, #<Post id: 2, title: ‘akai’>, user_id: 2>]
- 27. netguru.co 1. What is Active Record? 2. Convention over Configuration 3. Active Record Models 4. CRUD :001 > u = User.create(name: ‘XYZ’) :002 > users = User.all :003 > u.update(name: ‘Abc’)
- 28. MVC netguru.co
- 31. netguru.conetguru.co 127.0.0.1 - GET /index.html HTTP/1.0" 200 2326
- 32. netguru.co get ‘/’, to: ‘welcome#index’
- 33. netguru.co class WelcomeController < ApplicationController def index @posts = Post.all end end
- 34. netguru.co class Post < ActiveRecord::Base end
- 35. netguru.co
- 36. netguru.co class Post < ActiveRecord::Base end
- 37. netguru.co class WelcomeController < ApplicationController def index @posts = Post.all end end
- 38. netguru.co <ul> <% @posts.each do |post| %> <li> <%= post.title %> </li> <% end %> </ul>
- 41. TDD netguru.co
- 42. write specs, run and fail.. netguru.co
- 43. ..write code, run specs and succeed. netguru.co