Week 7 - Postgres and Intro to TDD

Postgres

Open source database used by heroku
Great database with lots of plugins including PostGIS

Installing Postgres

Install and start postgres
```
$ parts install postgresql

$ parts start postgresql
```
Will have to run parts start postgresql every time you log in to your machine

Create a new super user to connect to the db as

$ createuser --interactive rails
Shall the new role be a superuser? (y/n) y

Create a rails 4 app and set postgres as default database

Upgrade rails

$ gem update rails
$ rails -v
Rails 4.0.4

Create your new rails app with postgres as the default database. (-T means skip test unit files)
```
$ cd workspace
$ rails new readathon -d postgresql -T
$ cd readathon
```
Rename README.rdoc to README.md

Enter some info about your app

# Read-A-Thon

This is a sample app built in Durango Ruby School to help local kids with their schools Readathons

We don't want to check in our database.yml because it could contain passwords, or info specific to your dev machine. Let's make sure its never checked in

Click show hidden. Edit .gitignore and add this line
```
/config/database.yml
```

Rename database.yml to database.example.yml

$ mv config/database.yml database.example.yml

Update database.example.yml to look like this

defaults: &defaults
  adapter: postgresql
  encoding: unicode
  pool: 5 # Should be set to the number of sidekiq concurrency + web workers
  username: rails
  password:
  host: localhost


development:
  <<: *defaults
  database: readathon_development

# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
  <<: *defaults
  database: readathon_test
  min_messages: WARNING

production:
  <<: *defaults
  database: readathon_production

Update your readme to include the following setup instructions

## Setup Instructions

1. Copy config/database.example.yml to config/database.yml
2. Update config/database.yml to work with your local machine

Check in your changes
1. Create a new git repo
```
git init .
```
2. Stage your changes
```
$ git add .
```
3. Check to see what will be checked in
```
$ git status
```
  Make sure config/database.example.yml is going to be checked in, but not config/database.example.yml
4. Commit your changes
```
$ git commit -m "Initial checkin"
```

Copy database.example.yml to database.yml

$ cp config/database.example.yml config/database.yml

Run git status and make sure it shows no changes (since you ignored config/database.yml earlier)
```
$ git status
# On branch master
nothing to commit, working directory clean
```
Create your development database
```
$ rake db:create
```
Run rake db:migrate to set up the initial database
```
$ rake db:migrate
```
Run git status and see that it has generated the initial schema.rb file

Commit

$ git add .
$ git commit -m "Initial schema"

Start up your app and make sure it works.
```
$ bundle exec rails s
```

Test Driven Development

Why test?

To ensure the application works as expected
Help you develop better code
Ensure future changes don't break your code
- Makes sure refactoring code doesn't break exisiting functionality
Catch issues before they hit the user (ie. upgrading rails might cause issues that you might not expect)

Red, Green, Refactor

Write a failing test
Write the code to get the test to pass
Rework the code to make it more flexible, or easier to read without breaking it.

Outside-in Development

Outside - Write high level tests first that ensures you can complete a specific function (create a blog post)
In - Write low level tests, like ensuring a blog post has a title to cover all of the edge cases

Integration tests - the outside part. Use rspec and capybara Unit Tests - the inside part. Use rspec

Installing rspec

Add the following to your Gemfile

group :development, :test do
  gem 'rspec-rails'
end

Bundle install
```
$ bundle
```

Run rspec install generator

$ rails generate rspec:install
      create  .rspec
      create  spec
      create  spec/spec_helper.rb

Run rspec

$ rspec
No examples found.


Finished in 0.00006 seconds
0 examples, 0 failures

Commit

$ git add .
$ git commit -m "Installed rspec"

Writing your first test

Create spec/features/view_homepage_spec.rb
```
require 'spec_helper'
```

Run the spec

$ rspec spec/features/view_homepage_spec.rb
No examples found.


Finished in 0.00018 seconds
0 examples, 0 failures

Randomized with seed 31125

Add capybara to the Gemfile

group :development, :test do
  gem 'rspec-rails'
  gem 'capybara'
end

Bundle install
```
$ bundle
```

Write the first spec in spec/feature/view_homepage_spec.rb

require 'spec_helper'

feature "View the homepage" do
  scenario "user sees correct information" do
    visit root_path

    expect(page).to have_content "Welcome"
    expect(page).to have_title "Readathon App"
  end
end

Run the spec

$ rspec spec/features/view_homepage_spec.rb
F

Failures:

  1) View the homepage user sees correct information
     Failure/Error: visit root_path
     NameError:
       undefined local variable or method `root_path' for #<RSpec::Core::ExampleGroup::Nested_1:0x00000004407000>
     # ./spec/features/view_homepage_spec.rb:5:in `block (2 levels) in <top (required)>'

Finished in 0.00238 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/view_homepage_spec.rb:4 # View the homepage user sees correct information

Randomized with seed 61940

Create a route for the root path in config/routes.rb

Readathon::Application.routes.draw do
  root 'pages#index'
end

Run the spec

$ rspec spec/features/view_homepage_spec.rb
F

Failures:

  1) View the homepage user sees correct information
     Failure/Error: visit root_path
     ActionController::RoutingError:
       uninitialized constant PagesController
     # ./spec/features/view_homepage_spec.rb:5:in `block (2 levels) in <top (required)>'

Finished in 0.01884 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/view_homepage_spec.rb:4 # View the homepage user sees correct information

Randomized with seed 38271

Create the pages controller (app/controllers/pages_controller.rb)
```
class PagesController < ApplicationController
end
```

Run the spec

$ rspec spec/features/view_homepage_spec.rb
F

Failures:

  1) View the homepage user sees correct information
     Failure/Error: visit root_path
     AbstractController::ActionNotFound:
       The action 'index' could not be found for PagesController
     # ./spec/features/view_homepage_spec.rb:5:in `block (2 levels) in <top (required)>'

Finished in 0.03785 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/view_homepage_spec.rb:4 # View the homepage user sees correct information

Randomized with seed 14984

Create the index action in the pages controller

class PagesController < ApplicationController
  def index
  end
end

Run the spec

$ rspec spec/features/view_homepage_spec.rb
F

Failures:

  1) View the homepage user sees correct information
     Failure/Error: visit root_path
     ActionView::MissingTemplate:
       Missing template pages/index, application/index with {:locale=>[:en], :formats=>[:html], :handlers=>[:erb, :builder, :raw, :ruby, :jbuilder, :coffee]}. Sear
ched in:
         * "/home/action/workspace/readathon/app/views"
     # ./spec/features/view_homepage_spec.rb:5:in `block (2 levels) in <top (required)>'

Finished in 0.06525 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/view_homepage_spec.rb:4 # View the homepage user sees correct information

Randomized with seed 21833

Create app/views/pages/index.html.erb
```
<h1>Hello</h1>
```

Run the spec

$ rspec spec/features/view_homepage_spec.rb
F

Failures:

  1) View the homepage user sees correct information
     Failure/Error: expect(page).to have_content "Welcome"
       expected to find text "Welcome" in "Hello"
     # ./spec/features/view_homepage_spec.rb:8:in `block (2 levels) in <top (required)>'

Finished in 1.03 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/view_homepage_spec.rb:4 # View the homepage user sees correct information

Randomized with seed 25435

Edit app/views/pages/index.html.erb
```
<h1>Welcome</h1>
```

Run the spec

$ rspec spec/features/view_homepage_spec.rb
F

Failures:

  1) View the homepage user sees correct information
     Failure/Error: expect(page).to have_title "Readathon App"
       expected there to be title "Readathon App" in "Readathon"
     # ./spec/features/view_homepage_spec.rb:9:in `block (2 levels) in <top (required)>'

Finished in 0.60785 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/view_homepage_spec.rb:4 # View the homepage user sees correct information

Randomized with seed 42438

Fix the title in app/views/layouts/application.html.erb

<!DOCTYPE html>
<html>
<head>
  <title>Readathon App</title>
  <%= stylesheet_link_tag    "application", media: "all", "data-turbolinks-track" => true %>
  <%= javascript_include_tag "application", "data-turbolinks-track" => true %>
  <%= csrf_meta_tags %>
</head>
<body>

<%= yield %>

</body>
</html>

Run the spec

$ rspec spec/features/view_homepage_spec.rb
.

Finished in 0.11089 seconds
1 example, 0 failures

Randomized with seed 54230

Commit

$ git add .
$ git commit -m "View homepage feature"

Managing Books

Write a new spec spec/features/book_management_spec.rb
```
require "spec_helper"
```

Run the spec

$ rspec spec/features/book_management_spec.rb
No examples found.


Finished in 0.00018 seconds
0 examples, 0 failures

Randomized with seed 64289

Write the following spec

require "spec_helper"

feature "Book management" do
  scenario "User manages books" do
    visit root_path

    click_link "Books"
    click_link "Add book"

    fill_in "Title", with: "Garfield"
    fill_in "Pages", with: "250"

    click_button "Save"

    expect(page).to have_content "Garfield"
    expect(page).to_not have_content "Save"
  end
end

Run the spec

$ rspec spec/features/book_management_spec.rb
F

Failures:

  1) Book management User manages books
     Failure/Error: click_link "Books"
     Capybara::ElementNotFound:
       Unable to find link "Books"
     # ./spec/features/book_management_spec.rb:7:in `block (2 levels) in <top (required)>'

Finished in 0.12098 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/book_management_spec.rb:4 # Book management User manages books

Randomized with seed 59663

Create the book link in app/views/layouts/application.html.erb

<!DOCTYPE html>
<html>
<head>
  <title>Readathon App</title>
  <%= stylesheet_link_tag    "application", media: "all", "data-turbolinks-track" => true %>
  <%= javascript_include_tag "application", "data-turbolinks-track" => true %>
  <%= csrf_meta_tags %>
</head>
<body>
  <%= link_to "Books", books_path %>

<%= yield %>

</body>
</html>

Run the spec

rspec spec/features/book_management_spec.rb
F

Failures:

  1) Book management User manages books
     Failure/Error: visit root_path
     ActionView::Template::Error:
       undefined local variable or method `books_path' for #<#<Class:0x00000003f99ef0>:0x00000003f990b8>
     # ./app/views/layouts/application.html.erb:10:in `_app_views_layouts_application_html_erb___471408764387068500_33711640'
     # ./spec/features/book_management_spec.rb:5:in `block (2 levels) in <top (required)>'

Finished in 0.10605 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/book_management_spec.rb:4 # Book management User manages books

Randomized with seed 26005

Create the books route in config/routes.rb

Readathon::Application.routes.draw do
  root 'pages#index'

  resources :books, only: [:index]
end

Run the spec

$ rspec spec/features/book_management_spec.rb
F

Failures:

  1) Book management User manages books
     Failure/Error: click_link "Books"
     ActionController::RoutingError:
       uninitialized constant BooksController
     # ./spec/features/book_management_spec.rb:7:in `block (2 levels) in <top (required)>'

Finished in 0.11626 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/book_management_spec.rb:4 # Book management User manages books

Randomized with seed 23749

Create the books controller (app/controllers/books_controller.rb)
```
class BooksController < ApplicationController
end
```

Run the spec

$ rspec spec/features/book_management_spec.rb
F

Failures:

  1) Book management User manages books
     Failure/Error: click_link "Books"
     AbstractController::ActionNotFound:
       The action 'index' could not be found for BooksController
     # ./spec/features/book_management_spec.rb:7:in `block (2 levels) in <top (required)>'

Finished in 0.11503 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/book_management_spec.rb:4 # Book management User manages books

Randomized with seed 23501

Create the index action

class BooksController < ApplicationController
  def index
  end
end

Run the spec

$ rspec spec/features/book_management_spec.rb
F

Failures:

  1) Book management User manages books
     Failure/Error: click_link "Books"
     ActionView::MissingTemplate:
       Missing template books/index, application/index with {:locale=>[:en], :formats=>[:html], :handlers=>[:erb, :builder, :raw, :ruby, :jbuilder, :coffee]}. Searched in:
         * "/home/action/workspace/readathon/app/views"
     # ./spec/features/book_management_spec.rb:7:in `block (2 levels) in <top (required)>'

Finished in 0.11185 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/book_management_spec.rb:4 # Book management User manages books

Randomized with seed 29838

Create a blank app/views/books/index.html.erb

Run the spec

$ rspec spec/features/book_management_spec.rb
F

Failures:

  1) Book management User manages books
     Failure/Error: click_link "Add book"
     Capybara::ElementNotFound:
       Unable to find link "Add book"
     # ./spec/features/book_management_spec.rb:8:in `block (2 levels) in <top (required)>'

Finished in 0.10983 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/book_management_spec.rb:4 # Book management User manages books

Randomized with seed 2364

Create a an add book link in app/views/books/index.html.erb
```
<%= link_to "Add book", new_book_path %>
```

Run the spec

$ rspec spec/features/book_management_spec.rb
F

Failures:

  1) Book management User manages books
     Failure/Error: click_link "Books"
     ActionView::Template::Error:
       undefined local variable or method `new_book_path' for #<#<Class:0x00000002ac9188>:0x00000002ad26c0>
     # ./app/views/books/index.html.erb:1:in `_app_views_books_index_html_erb___2762012422487341792_22495960'
     # ./spec/features/book_management_spec.rb:7:in `block (2 levels) in <top (required)>'

Finished in 0.623 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/book_management_spec.rb:4 # Book management User manages books

Randomized with seed 39019

Create the new book route in config/routes.rb

Readathon::Application.routes.draw do
  root 'pages#index'

  resources :books, only: [:index, :new]
end

Run the spec

$ rspec spec/features/book_management_spec.rb
F

Failures:

  1) Book management User manages books
     Failure/Error: click_link "Add book"
     AbstractController::ActionNotFound:
       The action 'new' could not be found for BooksController
     # ./spec/features/book_management_spec.rb:8:in `block (2 levels) in <top (required)>'

Finished in 0.12338 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/book_management_spec.rb:4 # Book management User manages books

Randomized with seed 4326

Create the new action in app/controllers/books_controller.rb

class BooksController < ApplicationController
  def index
  end

  def new
  end
end

Run the spec

$ rspec spec/features/book_management_spec.rb
F

Failures:

  1) Book management User manages books
     Failure/Error: click_link "Add book"
     ActionView::MissingTemplate:
       Missing template books/new, application/new with {:locale=>[:en], :formats=>[:html], :handlers=>[:erb, :builder, :raw, :ruby, :jbuilder, :coffee]}. Searched in:
         * "/home/action/workspace/readathon/app/views"
     # ./spec/features/book_management_spec.rb:8:in `block (2 levels) in <top (required)>'

Finished in 0.62012 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/book_management_spec.rb:4 # Book management User manages books

Randomized with seed 431

Create an empty app/views/books/new.html.erb

Run the spec

$ rspec spec/features/book_management_spec.rb
F

Failures:

  1) Book management User manages books
     Failure/Error: fill_in :title, with: "Garfield"
     Capybara::ElementNotFound:
       Unable to find field :title
     # ./spec/features/book_management_spec.rb:10:in `block (2 levels) in <top (required)>'

Finished in 0.11956 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/book_management_spec.rb:4 # Book management User manages books

Randomized with seed 4341

Create the form

Add simpleform to the Gemfile
```
gem 'simple_form'
```
Bundle install
```
$ bundle install
```

Update app/views/books/new.html.erb

<%= simple_form_for @book do |f| %>
  <%= f.input :title %>
  <%= f.input :pages %>

  <%= f.submit "Save" %>
<% end %>

Run the spec

$ rspec spec/features/book_management_spec.rb
F

Failures:

  1) Book management User manages books
     Failure/Error: click_link "Add book"
     ActionView::Template::Error:
       undefined method `model_name' for NilClass:Class
     # ./app/views/books/new.html.erb:1:in `_app_views_books_new_html_erb___905899577793093027_28547520'
     # ./spec/features/book_management_spec.rb:8:in `block (2 levels) in <top (required)>'

Finished in 0.22834 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/book_management_spec.rb:4 # Book management User manages books

Randomized with seed 35141

Update app/controllers/books_controller.rb

class BooksController < ApplicationController
  def index
  end

  def new
    @book = Book.new
  end
end

Run the spec

$ rspec spec/features/book_management_spec.rb
F

Failures:

  1) Book management User manages books
     Failure/Error: click_link "Add book"
     NameError:
       uninitialized constant BooksController::Book
     # ./app/controllers/books_controller.rb:6:in `new'
     # ./spec/features/book_management_spec.rb:8:in `block (2 levels) in <top (required)>'

Finished in 0.11718 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/book_management_spec.rb:4 # Book management User manages books

Randomized with seed 12632

Create the book model

Generate the model

$ rails g model book title pages:integer
      invoke  active_record
      create    db/migrate/20140330223603_create_books.rb
      create    app/models/book.rb
      invoke    rspec
      create      spec/models/book_spec.rb

Migrate the database (and setup the test database)

$ rake db:migrate db:test:prepare
== 20140330223603 CreateBooks: migrating ======================================
-- create_table(:books)
   -> 0.2195s
== 20140330223603 CreateBooks: migrated (0.2197s) =============================

Run the spec

$ rspec spec/features/book_management_spec.rb
F

Failures:

  1) Book management User manages books
     Failure/Error: click_button "Save"
     ActionController::RoutingError:
       No route matches [POST] "/books"
     # ./spec/features/book_management_spec.rb:13:in `block (2 levels) in <top (required)>'

Finished in 0.24519 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/book_management_spec.rb:4 # Book management User manages books

Randomized with seed 59351

Update config/routes.rb to have a :create action

Readathon::Application.routes.draw do
  root 'pages#index'

  resources :books, only: [:index, :new, :create]
end

Run the spec

$ rspec spec/features/book_management_spec.rb
F

Failures:

  1) Book management User manages books
     Failure/Error: click_button "Save"
     AbstractController::ActionNotFound:
       The action 'create' could not be found for BooksController
     # ./spec/features/book_management_spec.rb:13:in `block (2 levels) in <top (required)>'

Finished in 0.22995 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/book_management_spec.rb:4 # Book management User manages books

Randomized with seed 42682

Add the create action to the books controller

class BooksController < ApplicationController
  def index
  end

  def new
    @book = Book.new
  end

  def create
  end
end

Run the spec

$ rspec spec/features/book_management_spec.rb
F

Failures:

  1) Book management User manages books
     Failure/Error: click_button "Save"
     ActionView::MissingTemplate:
       Missing template books/create, application/create with {:locale=>[:en], :formats=>[:html], :handlers=>[:erb, :builder, :raw, :ruby, :jbuilder, :coffee]}. Searched in:
         * "/home/action/workspace/readathon/app/views"
     # ./spec/features/book_management_spec.rb:13:in `block (2 levels) in <top (required)>'

Finished in 0.74083 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/book_management_spec.rb:4 # Book management User manages books

Randomized with seed 1865

Fill in the create action

class BooksController < ApplicationController
  def index
  end

  def new
    @book = Book.new
  end

  def create
    @book = Book.new params[:book]
    if @book.save
      redirect_to @book
    else
      render "new"
    end
  end
end

Run the spec

$ rspec spec/features/book_management_spec.rb
F

Failures:

  1) Book management User manages books
     Failure/Error: click_button "Save"
     ActiveModel::ForbiddenAttributesError:
       ActiveModel::ForbiddenAttributesError
     # ./app/controllers/books_controller.rb:10:in `create'
     # ./spec/features/book_management_spec.rb:13:in `block (2 levels) in <top (required)>'

Finished in 0.73036 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/book_management_spec.rb:4 # Book management User manages books

Randomized with seed 56075

Permit the attributes using strong parameters

class BooksController < ApplicationController
  def index
  end

  def new
    @book = Book.new
  end

  def create
    @book = Book.new book_params
    if @book.save
      redirect_to @book
    else
      render "new"
    end
  end

  private

  def book_params
    params.require(:book).permit(:title, :pages)
  end
end

Run the spec

$ rspec spec/features/book_management_spec.rb
F

Failures:

  1) Book management User manages books
     Failure/Error: click_button "Save"
     NoMethodError:
       undefined method `book_url' for #<BooksController:0x000000043ae978>
     # ./app/controllers/books_controller.rb:12:in `create'
     # ./spec/features/book_management_spec.rb:13:in `block (2 levels) in <top (required)>'

Finished in 0.29652 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/book_management_spec.rb:4 # Book management User manages books

Randomized with seed 1126

Add the show route for books in config/routes.rb

Readathon::Application.routes.draw do
  root 'pages#index'

  resources :books, only: [:index, :new, :create, :show]
end

Run the spec

$ rspec spec/features/book_management_spec.rb
F

Failures:

  1) Book management User manages books
     Failure/Error: click_button "Save"
     AbstractController::ActionNotFound:
       The action 'show' could not be found for BooksController
     # ./spec/features/book_management_spec.rb:13:in `block (2 levels) in <top (required)>'

Finished in 0.75141 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/book_management_spec.rb:4 # Book management User manages books

Randomized with seed 53799

Create the show action in app/controllers/books_controller.rb

class BooksController < ApplicationController
  def index
  end

  def new
    @book = Book.new
  end

  def show
  end

  def create
    @book = Book.new book_params
    if @book.save
      redirect_to @book
    else
      render "new"
    end
  end

  private

  def book_params
    params.require(:book).permit(:title, :pages)
  end
end

Run the spec

$ rspec spec/features/book_management_spec.rb
F

Failures:

  1) Book management User manages books
     Failure/Error: click_button "Save"
     ActionView::MissingTemplate:
       Missing template books/show, application/show with {:locale=>[:en], :formats=>[:html], :handlers=>[:erb, :builder, :raw, :ruby, :jbuilder, :coffee]}. Searched in:
         * "/home/action/workspace/readathon/app/views"
     # ./spec/features/book_management_spec.rb:13:in `block (2 levels) in <top (required)>'

Finished in 0.75007 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/book_management_spec.rb:4 # Book management User manages books

Randomized with seed 35501

Create an empty app/books/views/show.html.erb

Run the spec

$ rspec spec/features/book_management_spec.rb
F

Failures:

  1) Book management User manages books
     Failure/Error: expect(page).to have_content "Garfield"
       expected to find text "Garfield" in "Books"
     # ./spec/features/book_management_spec.rb:15:in `block (2 levels) in <top (required)>'

Finished in 0.75184 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/book_management_spec.rb:4 # Book management User manages books

Randomized with seed 55177

Fill out app/views/books/show.html.erb

<h1><%= @book.title %><h1>

<p>This book has <%= @book.pages %></p>

Run the spec

$ rspec spec/features/book_management_spec.rb
F

Failures:

  1) Book management User manages books
     Failure/Error: click_button "Save"
     ActionView::Template::Error:
       undefined method `title' for nil:NilClass
     # ./app/views/books/show.html.erb:1:in `_app_views_books_show_html_erb__3179130953602822843_34063580'
     # ./spec/features/book_management_spec.rb:13:in `block (2 levels) in <top (required)>'

Finished in 0.7481 seconds
1 example, 1 failure

Failed examples:

rspec ./spec/features/book_management_spec.rb:4 # Book management User manages books

Randomized with seed 34673

Update the show action in the books controller

class BooksController < ApplicationController
  def index
  end

  def new
    @book = Book.new
  end

  def show
    @book = Book.find params[:id]
  end

  def create
    @book = Book.new book_params
    if @book.save
      redirect_to @book
    else
      render "new"
    end
  end

  private

  def book_params
    params.require(:book).permit(:title, :pages)
  end
end

Run the spec

$ rspec spec/features/book_management_spec.rb
.

Finished in 0.74807 seconds
1 example, 0 failures

Randomized with seed 19101

WooHoo!!! Commit it!

$ git add .
$ git commit -m "Add book functionality"

Let's see what we built

Fire up the server
```
$ bundle exec rails s
```

Deploying on heroku

The heroku toolbelt is already installed on Nitrous by default

Create the app from your command line

$ heroku apps:create <your-initials>-readathon
Enter your Heroku credentials.
Email: you@example.com
Password (typing will be hidden):
Creating test-readathon... done, stack is cedar
http://test-readathon.herokuapp.com/ | git@heroku.com:test-readathon.git
Git remote heroku added

Run git remote to see a new heroku remote has been added.
```
$ git remote
heroku
```
Upload your ssk key so you can deploy. Only need to do this the first time you push to heroku from your computer
```
$ heroku keys:add
```
Deploy to heroku
```
$ git push heroku master
```
Migrate the heroku database
```
$ heroku run rake db:migrate
```
Go to http://<your-initials>-readathon.herokuapp.com

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Week 7 - Postgres and Intro to TDD

Postgres

Installing Postgres

Create a rails 4 app and set postgres as default database

Test Driven Development

Why test?

Installing rspec

Writing your first test

Managing Books

Let's see what we built

Deploying on heroku

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Week 7 - Postgres and Intro to TDD

Postgres

Installing Postgres

Create a rails 4 app and set postgres as default database

Test Driven Development

Why test?

Installing rspec

Writing your first test

Managing Books

Let's see what we built

Deploying on heroku