Gain insights into Ruby on Rails fundamentals, creating projects, deploying, CRUD operations, user authentication, and session management. Build foundational skills to develop complex applications.

working4.tar.gz

default

hello

crud migration

crud CR

crud app1

redd

testing

votable_fix

CRUD new1

In this course, you will learn the fundamentals of Ruby on Rails to build your own application.

You will start by learning how to create a new project, deploy to a Rails server, and the Rails design pattern. After that, you’ll learn how to perform CRUD operations, handle user authentication, and manage sessions.

Once you finish this course, you’ll have the foundations in place to build more complex applications to add to your portfolio.

Introduction to Ruby on Rails

# See https://help.github.com/articles/ignoring-files for more about ignoring files.
#
# If you find yourself ignoring temporary files generated by your text editor
# or operating system, you probably want to add a global ignore instead:
#   git config --global core.excludesfile '~/.gitignore_global'

# Ignore bundler config.
/.bundle

# Ignore the default SQLite database.
/db/*.sqlite3
/db/*.sqlite3-journal

# Ignore all logfiles and tempfiles.
/log/*
/tmp/*
!/log/.keep
!/tmp/.keep

# Ignore uploaded files in development
/storage/*
!/storage/.keep

/node_modules
/yarn-error.log

/public/assets
.byebug_history

# Ignore master key for decrypting credentials and more.
/config/master.key


source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }

ruby '2.5.5'

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 5.2.4', '>= 5.2.4.4'
# Use sqlite3 as the database for Active Record
gem 'sqlite3'
# Use Puma as the app server
gem 'puma', '~> 4.3'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# See https://github.com/rails/execjs#readme for more supported runtimes
# gem 'mini_racer', platforms: :ruby
gem 'devise', '~> 4.4', '>= 4.4.1'
gem 'acts_as_votable'
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.2'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.5'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 4.0'
# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use ActiveStorage variant
# gem 'mini_magick', '~> 4.8'

# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development

# Reduces boot times through caching; required in config/boot.rb
gem 'bootsnap', '>= 1.1.0', require: false

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
end

group :development do
  # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
  gem 'web-console', '>= 3.3.0'
  gem 'listen', '>= 3.0.5', '< 3.2'
  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem 'spring'
  gem 'spring-watcher-listen', '~> 2.0.0'
end

group :test do
  # Adds support for Capybara system testing and selenium driver
  gem 'capybara', '>= 2.15'
  gem 'selenium-webdriver'
  # Easy installation and use of chromedriver to run system tests with Chrome
  gem 'chromedriver-helper'
end

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]


GEM
  remote: https://rubygems.org/
  specs:
    actioncable (5.2.4.4)
      actionpack (= 5.2.4.4)
      nio4r (~> 2.0)
      websocket-driver (>= 0.6.1)
    actionmailer (5.2.4.4)
      actionpack (= 5.2.4.4)
      actionview (= 5.2.4.4)
      activejob (= 5.2.4.4)
      mail (~> 2.5, >= 2.5.4)
      rails-dom-testing (~> 2.0)
    actionpack (5.2.4.4)
      actionview (= 5.2.4.4)
      activesupport (= 5.2.4.4)
      rack (~> 2.0, >= 2.0.8)
      rack-test (>= 0.6.3)
      rails-dom-testing (~> 2.0)
      rails-html-sanitizer (~> 1.0, >= 1.0.2)
    actionview (5.2.4.4)
      activesupport (= 5.2.4.4)
      builder (~> 3.1)
      erubi (~> 1.4)
      rails-dom-testing (~> 2.0)
      rails-html-sanitizer (~> 1.0, >= 1.0.3)
    activejob (5.2.4.4)
      activesupport (= 5.2.4.4)
      globalid (>= 0.3.6)
    activemodel (5.2.4.4)
      activesupport (= 5.2.4.4)
    activerecord (5.2.4.4)
      activemodel (= 5.2.4.4)
      activesupport (= 5.2.4.4)
      arel (>= 9.0)
    activestorage (5.2.4.4)
      actionpack (= 5.2.4.4)
      activerecord (= 5.2.4.4)
      marcel (~> 0.3.1)
    activesupport (5.2.4.4)
      concurrent-ruby (~> 1.0, >= 1.0.2)
      i18n (>= 0.7, < 2)
      minitest (~> 5.1)
      tzinfo (~> 1.1)
    acts_as_votable (0.12.1)
    addressable (2.7.0)
      public_suffix (>= 2.0.2, < 5.0)
    archive-zip (0.12.0)
      io-like (~> 0.3.0)
    arel (9.0.0)
    bcrypt (3.1.16)
    bindex (0.8.1)
    bootsnap (1.4.8)
      msgpack (~> 1.0)
    builder (3.2.4)
    byebug (11.1.3)
    capybara (3.33.0)
      addressable
      mini_mime (>= 0.1.3)
      nokogiri (~> 1.8)
      rack (>= 1.6.0)
      rack-test (>= 0.6.3)
      regexp_parser (~> 1.5)
      xpath (~> 3.2)
    childprocess (3.0.0)
    chromedriver-helper (2.1.1)
      archive-zip (~> 0.10)
      nokogiri (~> 1.8)
    coffee-rails (4.2.2)
      coffee-script (>= 2.2.0)
      railties (>= 4.0.0)
    coffee-script (2.4.1)
      coffee-script-source
      execjs
    coffee-script-source (1.12.2)
    concurrent-ruby (1.1.7)
    crass (1.0.6)
    devise (4.7.3)
      bcrypt (~> 3.0)
      orm_adapter (~> 0.1)
      railties (>= 4.1.0)
      responders
      warden (~> 1.2.3)
    erubi (1.9.0)
    execjs (2.7.0)
    ffi (1.13.1)
    globalid (0.4.2)
      activesupport (>= 4.2.0)
    i18n (1.8.5)
      concurrent-ruby (~> 1.0)
    io-like (0.3.1)
    jbuilder (2.10.1)
      activesupport (>= 5.0.0)
    listen (3.1.5)
      rb-fsevent (~> 0.9, >= 0.9.4)
      rb-inotify (~> 0.9, >= 0.9.7)
      ruby_dep (~> 1.2)
    loofah (2.7.0)
      crass (~> 1.0.2)
      nokogiri (>= 1.5.9)
    mail (2.7.1)
      mini_mime (>= 0.1.1)
    marcel (0.3.3)
      mimemagic (~> 0.3.2)
    method_source (1.0.0)
    mimemagic (0.3.5)
    mini_mime (1.0.2)
    mini_portile2 (2.4.0)
    minitest (5.14.2)
    msgpack (1.3.3)
    nio4r (2.5.4)
    nokogiri (1.10.10)
      mini_portile2 (~> 2.4.0)
    orm_adapter (0.5.0)
    public_suffix (4.0.6)
    puma (4.3.6)
      nio4r (~> 2.0)
    rack (2.2.3)
    rack-test (1.1.0)
      rack (>= 1.0, < 3)
    rails (5.2.4.4)
      actioncable (= 5.2.4.4)
      actionmailer (= 5.2.4.4)
      actionpack (= 5.2.4.4)
      actionview (= 5.2.4.4)
      activejob (= 5.2.4.4)
      activemodel (= 5.2.4.4)
      activerecord (= 5.2.4.4)
      activestorage (= 5.2.4.4)
      activesupport (= 5.2.4.4)
      bundler (>= 1.3.0)
      railties (= 5.2.4.4)
      sprockets-rails (>= 2.0.0)
    rails-dom-testing (2.0.3)
      activesupport (>= 4.2.0)
      nokogiri (>= 1.6)
    rails-html-sanitizer (1.3.0)
      loofah (~> 2.3)
    railties (5.2.4.4)
      actionpack (= 5.2.4.4)
      activesupport (= 5.2.4.4)
      method_source
      rake (>= 0.8.7)
      thor (>= 0.19.0, < 2.0)
    rake (13.0.1)
    rb-fsevent (0.10.4)
    rb-inotify (0.10.1)
      ffi (~> 1.0)
    regexp_parser (1.8.2)
    responders (3.0.1)
      actionpack (>= 5.0)
      railties (>= 5.0)
    ruby_dep (1.5.0)
    rubyzip (2.3.0)
    sass (3.7.4)
      sass-listen (~> 4.0.0)
    sass-listen (4.0.0)
      rb-fsevent (~> 0.9, >= 0.9.4)
      rb-inotify (~> 0.9, >= 0.9.7)
    sass-rails (5.1.0)
      railties (>= 5.2.0)
      sass (~> 3.1)
      sprockets (>= 2.8, < 4.0)
      sprockets-rails (>= 2.0, < 4.0)
      tilt (>= 1.1, < 3)
    selenium-webdriver (3.142.7)
      childprocess (>= 0.5, < 4.0)
      rubyzip (>= 1.2.2)
    spring (2.1.1)
    spring-watcher-listen (2.0.1)
      listen (>= 2.7, < 4.0)
      spring (>= 1.2, < 3.0)
    sprockets (3.7.2)
      concurrent-ruby (~> 1.0)
      rack (> 1, < 3)
    sprockets-rails (3.2.2)
      actionpack (>= 4.0)
      activesupport (>= 4.0)
      sprockets (>= 3.0.0)
    sqlite3 (1.4.2)
    thor (1.0.1)
    thread_safe (0.3.6)
    tilt (2.0.10)
    turbolinks (5.2.1)
      turbolinks-source (~> 5.2)
    turbolinks-source (5.2.0)
    tzinfo (1.2.7)
      thread_safe (~> 0.1)
    uglifier (4.2.0)
      execjs (>= 0.3.0, < 3)
    warden (1.2.9)
      rack (>= 2.0.9)
    web-console (3.7.0)
      actionview (>= 5.0)
      activemodel (>= 5.0)
      bindex (>= 0.4.0)
      railties (>= 5.0)
    websocket-driver (0.7.3)
      websocket-extensions (>= 0.1.0)
    websocket-extensions (0.1.5)
    xpath (3.2.0)
      nokogiri (~> 1.8)

PLATFORMS
  ruby

DEPENDENCIES
  acts_as_votable
  bootsnap (>= 1.1.0)
  byebug
  capybara (>= 2.15)
  chromedriver-helper
  coffee-rails (~> 4.2)
  devise (~> 4.4, >= 4.4.1)
  jbuilder (~> 2.5)
  listen (>= 3.0.5, < 3.2)
  puma (~> 3.11)
  rails (~> 5.2.4, >= 5.2.4.4)
  sass-rails (~> 5.0)
  selenium-webdriver
  spring
  spring-watcher-listen (~> 2.0.0)
  sqlite3
  turbolinks (~> 5)
  tzinfo-data
  uglifier (>= 1.3.0)
  web-console (>= 3.3.0)

RUBY VERSION
   ruby 2.5.5p157

BUNDLED WITH
   1.17.3


# README

This README would normally document whatever steps are necessary to get the
application up and running.

Things you may want to cover:

* Ruby version

* System dependencies

* Configuration

* Database creation

* Database initialization

* How to run the test suite

* Services (job queues, cache servers, search engines, etc.)

* Deployment instructions

* ...


# Add your own tasks in files placed in lib/tasks ending in .rake,
# for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.

require_relative 'config/application'

Rails.application.load_tasks


# This file is used by Rack-based servers to start the application.

require_relative 'config/environment'

run Rails.application


{
  "name": "reddit",
  "private": true,
  "dependencies": {}
}


React

Dart

GoJS React

Typescript React

Vue.js

## Explanation
### `app/controllers/comments_controller.rb   `

**Line 28:** Retrieves the `link_id` for the currently opened link and stores it in an instance variable (`@link`). Each request for `comment` has to keep track of the link to which the comment is attached, thus the initial call to the `find` method on the `Link` model.
    

**Line 29:** Calls the `new` method (method for models, not controller action) on `@link.comments` to create a new comment and associates the comment to the particular link.
> **Note:** Since `@comment.save` is called separately on **line 33**, we do not use the `create` method. You could do so, but you should avoid that due to the structure Rails has already set up for `@comment.save`.
    
**Line 30:** Associates `current_user` to the user who has submitted the comment.

**line 34:** Redirects you to the `show` view of `link`. 


> **Note:** The `respond_to` block in **line 32** runs only one of the `format.` lines (**lines 34** and **35**). If the initial request was an ajax request, then `format.json` is run; otherwise, `format.html` will run as in our case.

# Explanation
## `app/controllers/comments_controller.rb   `

**Line 28:** Retrieves the `link_id` for the currently opened link and stores it in an instance variable (`@link`). Each request for `comment` has to keep track of the link to which the comment is attached, thus the initial call to the `find` method on the `Link` model.
    

**Line 29:** Calls the `new` method (method for models, not controller action) on `@link.comments` to create a new comment and associates the comment to the particular link.
> **Note:** Since `@comment.save` is called separately on **line 33**, we do not use the `create` method. You could do so, but you should avoid that due to the structure Rails has already set up for `@comment.save`.
    
**Line 30:** Associates `current_user` to the user who has submitted the comment.

**line 34:** Redirects you to the `show` view of `link`. 


> **Note:** The `respond_to` block in **line 32** runs only one of the `format.` lines (**lines 34** and **35**). If the initial request was an ajax request, then `format.json` is run; otherwise, `format.html` will run as in our case.

The solution to the Controller challenge.

Introduction to Ruby on Rails

CRUD on Rails

Your First Rails Application!

Comments

Create a Bill Split Application Using Ruby on Rails

Testing

Conclusion

Challenge Solution: Controller

Solution

Explanation

`app/controllers/comments_controller.rb`