Index

A note on the digital index

A link in an index entry is displayed as the section title in which that entry appears. Because some sections have multiple index markers, it is not unusual for an entry to have several links to the same section. Clicking on any link will take you directly to the place in the text in which the marker appears.

Symbols

404.html file, The config Directory

422.html file, The config Directory

500.html file, The config Directory

&& (and) operator, Hashes

@, for instance variables, Methods

(backslash), for special characters, Strings

: (colon), for symbols, Strings

{ } (curly braces), Arrays, Iteration

for blocks, Iteration
for hashes, Arrays

:: (double-colon) operator, Modules

" (double-quotes), for strings, Strings

== (equal) operator, Hashes

! (exclamation mark), at end of method name, Strings

=> (hash rocket), Arrays

> (greater than) operator, Hashes

< (less than) operator, Hashes, Classes

and inheritance, Classes

<< operator, Arrays

<=> operator, include

<%= %> tag, Embedded Ruby

<% %> tag, Embedded Ruby

<%# %> tag, for comments, Control Flow

% (modulus) operator, Data Types

!= (not equal) operator, Hashes

|| (or) operator, Hashes

||= (conditional assignment) operator, Booleans

+ operator, to add arrays, Arrays

? (question mark), at end of method name, Strings

[ ] (square brackets), for array, Strings

_ (underscore), in partial names, CSRF Meta Tags Helper

| (vertical pipe), Iteration

A

Accessor class, defining, class_eval

Active Record, The Post Model, Read, Delete, Query Conditions, Advanced Active Record, Caching

cache_key method, Caching
calculations, Query Conditions
query conditions, Delete
relation, Read

ActiveRecord::Base, inheriting from, has_many :through

ActiveRecord::RecordNotFound exception, Read, The has_many Methods

ActiveSupport::Cache::FileStore cache store, Caching

ActiveSupport::Cache::MemoryStore cache store, Caching

ActiveSupport::TestCase module, Running Tests

Ada, Ruby Fundamentals

add command (Git), Getting Started

alert class, Sign Up

alert-danger class, Sign Up

alert message, Sign Up

alert-success class, Sign Up

all method, Read

Amazon Elastic Compute Cloud (Amazon EC2), Virtual Private Servers

Amazon Web Services (AWS), Virtual Private Servers

ancestors class method, extend

and (&&) operator, Hashes

anonymous users, restricting page access, The Authentication System, Current User

Apache, Installing Ruby, Adding a Virtual Host

disabling default site, Adding a Virtual Host
installing, Installing Ruby

API controllers, API Controllers

api module, Authenticating Requests

API requests, Curl, Authentication

adding route for, Authentication
authentication credentials for, Curl

APIs (application programming interfaces), Render or Redirect, Authentication, Jbuilder

creating, Authentication
token-based authentication, Jbuilder

api_token string, Jbuilder

app/assets directory, Layouts, Layouts, stylesheet_link_tag, Authentication, Authentication, Built-in Optimization Features, Built-in Optimization Features, Built-in Optimization Features, Manifests

application.css file, Layouts, Authentication, Built-in Optimization Features
application.js file, stylesheet_link_tag, Authentication
javascripts directory, Built-in Optimization Features
stylesheets directory, Built-in Optimization Features

app/controllers directory, Paths and URLs, The Authentication System, Sign Up, Implementation, Show User, Create Post, Create Post, Authorization Attacks, Authorization Attacks, Preventing CSRF, Pagination, Log Levels, API Controllers, Generating Tokens, Authenticating Requests, Chapter 5, Chapter 9, Chapter 10, Chapter 10, Chapter 10, Chapter 11, Chapter 11, Chapter 13, Chapter 13, Chapter 13

api/posts_controller.rb file, API Controllers, Chapter 13

api/text_posts_controller.rb file, Authenticating Requests

application_controller.rb file, Implementation, Preventing CSRF, Generating Tokens

comments_controller.rb file, Chapter 5, Chapter 9, Chapter 11

destroy action in, Chapter 5

image_post_controller.rb file, Authorization Attacks, Chapter 10, Chapter 10

ImagePostsController methods, Chapter 10

posts_controller.rb file, Paths and URLs, The Authentication System, Pagination, Log Levels, Chapter 11, Chapter 13

index action, Pagination
logger statement, Log Levels
PostsController, Chapter 11

sessions_controller.rb file, Chapter 13

text_posts_controller.rb file, Create Post, Create Post, Authorization Attacks

users_controller.rb file, Sign Up, Show User, Chapter 10

app/helpers directory, Number Helpers, Number Helpers, Number Helpers

application_helper.rb file, Number Helpers
posts_helper.rb module, Number Helpers

application, view for, Don’t Repeat Yourself

ApplicationController class, Current User, Generating Tokens

authentication method in, Generating Tokens

ApplicationHelper module, Number Helpers, Modules

application programming interface, Render or Redirect (see API (application programming interface))

application.rb file, The config Directory

application server, for Ruby on Rails, Installing Ruby

app/models directory, Models, User Model, User Model, Post Models, Post Models, Post Models, Sign Up, Running Tests, Low-Level Caching, Chapter 2

comment.rb file, Low-Level Caching, Chapter 2

adding validation, Chapter 2

ext_post.rb file, checking for body text, Post Models

image_post.rb file, Post Models

post.rb file, Models

subscription.rb file, User Model

user.rb file, User Model, Post Models, Sign Up, Running Tests

has_many association, Post Models

app/views directory, Embedded Ruby, Embedded Ruby, Embedded Ruby, The Posts Index Page, Layouts, Collections, The Authentication System, Post Index and Show, Post Index and Show, Post Index and Show, Sign Up, Sessions, Current User, Show User, Show User, Create Post, Create Post, Authorization Attacks, Authorization Attacks, Authorization Attacks, Preventing CSRF, Pagination, Caching, Low-Level Caching, Issues, The debug Helper, Chapter 4, Chapter 9, Chapter 9, Chapter 9, Chapter 9, Chapter 9, Chapter 10, Chapter 10, Chapter 10, Chapter 11, Chapter 12, Chapter 12, Chapter 13, Chapter 15

comments/_comment.html.erb file, Chapter 9, Chapter 11, Chapter 12

image_posts/edit.html.erb file, Authorization Attacks

image_posts/_form.html.erb file, Chapter 10

image_posts/_image_post.html.erb file, Post Index and Show, Low-Level Caching, Issues, Chapter 9, Chapter 9

ImagePost partial, Chapter 9

image_posts/new.html.erb file, Chapter 10

layouts/application.html.erb file, Layouts, Current User, Preventing CSRF, The debug Helper, Chapter 4, Chapter 10, Chapter 15

updating, Chapter 4

link_posts/_link_post.html.erb file, Chapter 13

posts/index.html.erb file, Embedded Ruby, The Posts Index Page, The Authentication System, Create Post, Pagination

will_paginate call, Pagination

posts/show.html.erb file, Embedded Ruby, Collections, Post Index and Show

sessions/new.html.erb file, for login form, Sessions

text_posts/edit.html.erb file, Authorization Attacks

text_posts/_form.html.erb file, Create Post

text_posts/_text_post.html.erb file, Post Index and Show, Authorization Attacks, Caching, Chapter 9, Chapter 9, Chapter 12

comment count in, Caching
TextPost partial, Chapter 9

users/new.html.erb file, Sign Up

users/show.html.erb file, Show User, Show User

apt-get system, for software install, Amazon AWS Setup

arrays, Strings, Hashes, Read

for all keys in hash, Hashes
returning first and last entries in, Read

ASC order, for retrieving posts, Delete

as_json method, API Controllers

assertions, Running Tests, Post Fixtures, Controller Tests

controller test, Controller Tests
in testing, Running Tests

asset pipeline, Layouts, Built-in Optimization Features, Built-in Optimization Features, Manifests, Manifests, Debug Mode

asset precompilation, Debug Mode
debug mode, Manifests
manifests, Built-in Optimization Features
viewing search path list, Manifests

assets, in Rails application, Layouts

assets:clobber rake task, Debug Mode

assets directory, Controller, The config Directory

assigns hash, Controller Tests

associations, Testing Data, Testing Data, Adding Associations, Adding Associations, The has_many Methods, Advanced Active Record, Self Join Associations, has_and_belongs_to_many, Single-Table Inheritance, User Model, User Model, N + 1 Queries, Low-Level Caching

adding, Adding Associations
belongs_to methods, The has_many Methods
defining, User Model
generating model, Testing Data
has_many methods, Adding Associations
has_many :through, has_and_belongs_to_many
many-to-many, Self Join Associations
polymorphic, Single-Table Inheritance
self join, Advanced Active Record
specifying in advance, N + 1 Queries
testing, User Model
touch option, Low-Level Caching

attr_accessor method, Classes, Modules, define_method

attributes of object, displaying, Log Levels

authenticated user, for TextPostsController, Create Post

authenticate_or_request_with_http_token method, Generating Tokens

authenticate_user! method, Current User, Chapter 10

authenticating over SSH (secure shell), Heroku

authentication, Authentication, The Authentication System, Sign Up, Current User, Security, Curl, Jbuilder, Generating Tokens

vs. authorization, Security
of current user, The Authentication System
with GitHub API, Curl
log in, Sign Up
of requests, Generating Tokens
token-based, Jbuilder
of user, Current User

authenticity_token token, Preventing CSRF

authorization attacks, Security

author migration, Adding a Column

average method, Query Conditions

AWS (Amazon Web Services), Virtual Private Servers

B

backslash (), for special characters, Strings

BasicObject class, Ancestors

bcrypt gem, Post Index and Show, Chapter 9

BCrypt::Password.create method, Running Tests

before_action :authenticate_token! method, Authenticating Requests

before_action :authenticate_user! method, Chapter 9

before_action method (Rails), Paths and URLs, Current User

belongs_to association, Advanced Active Record, Self Join Associations, Single-Table Inheritance, User Model, Chapter 8

belongs_to methods, The has_many Methods

belongs_to statement, Adding Associations

between? method, include

bin directory, Rails Fundamentals, Controller, Views, Authentication, Post Index and Show, Sign Up, Testing in Rails, Model Tests, Testing a Flow, The debug Helper, Logging, Authentication, Jbuilder, Chapter 8, Chapter 9, Chapter 15

bundle install command, Authentication, Post Index and Show, Logging
cap production deploy command, Chapter 15
rails console command, Chapter 8, Chapter 9
rails generate command, Testing a Flow
rails server command, Views
rake db:migrate command, Sign Up, Jbuilder
rake log:clear command, The debug Helper
rake routes command, Authentication
rake test command, Testing in Rails
rake test:models command, Model Tests

--binstubs option, for bundler, Getting Started

block of code, Iteration

blog posts, adding comments, Testing Data

body element (HTML), Layouts

Booleans, Hashes

Bootstrap, Authentication, Post Index and Show, Sign Up, Show User

form-group class, Sign Up
panel component, Post Index and Show
styles for links, Show User

bootstrap_sass gem, Authentication

branch command (Git), Other Useful Commands

branching, Variables

BrightBox, Amazon AWS Setup

build-essential package, Installing PostgreSQL

build tools, installing, Installing PostgreSQL

bundle command, The public Directory, Updating Your Gemfile, Installing PostgreSQL

bundle install command, Rails Fundamentals, Add to Git

Bundler tool, The public Directory, Updating Your Gemfile

flags in, Updating Your Gemfile

business logic, Don’t Repeat Yourself

byebug gem, Logging

C

cached_comment_count method, Low-Level Caching

cache_key method, Caching, Low-Level Caching, Fragment Caching

cache keys, Caching, Chapter 12

cache store, Pagination, Caching

Rails support of, Caching

caching, Pagination, Caching, Caching, Low-Level Caching, Fragment Caching

enabling, Caching
fragment, Low-Level Caching
issues, Fragment Caching
low-level, Caching

calc method, prepend

callbacks, eliminating, Putting Assertions to Work

canceling current operation, Interactive Ruby

cannot_feature! method, Chapter 6

Capfile, Getting Started

Capistrano, Debug Mode, Installing Gems, Getting Started, Getting Started, Configuration, Database Setup, Add to Git, Adding a Virtual Host

configuration, Getting Started
database setup, Configuration
deployment, Add to Git
secrets setup, Database Setup
setup, Getting Started
virtual host, Adding a Virtual Host

capistrano-rails gem, Getting Started

Cascading Style Sheets (CSS), Layouts, Authentication, Built-in Optimization Features

asset pipeline and, Built-in Optimization Features
including in application, Authentication
lists of application use, Layouts

case, Booleans, Variables

for constants, Booleans
for variables, Variables

cd command, Rails Fundamentals

centralized version control systems, Version Control

change_column method, Adding a Column

change method, Migrations

changes, pushing or pulling, Version Control

checkout command (Git), Other Useful Commands, Branches

child model, Advanced Active Record

classes, Methods, Classes, Classes, prepend, extend, Ancestors, Ancestors

adding new methods, Classes
ancestors, extend
assigning method calls to another, prepend
creating instance of, Classes
as instance of other class, Ancestors
methods, Ancestors

class_eval method, define_method

class methods, Classes

class statement, Methods

client error, Interactive Ruby, Status Codes

cloud application platform, Deployment (see Heroku cloud application platform)

code, Iteration, Turbolinks in Action, Debugger Commands

block, Iteration
executing inside debugger, Debugger Commands
optimization, Turbolinks in Action

CoffeeScript, Built-in Optimization Features, Turbolinks in Action

:collection option, CSRF Meta Tags Helper

collections, CSRF Meta Tags Helper

colon (:), for symbols, Strings

columns in database, adding, Adding a Column

combining strings, Strings

comment model, Comment Model, Chapter 8

comment_params method, Adding Comments, Chapter 4

comments, Testing Data, Adding Associations, The has_many Methods, Back to Controller Actions, Collections, Form Controls, Chapter 11

adding, Back to Controller Actions
adding to blog posts, Testing Data
belongs_to methods, The has_many Methods
form, Form Controls
has_many methods, Adding Associations
show page for, Chapter 11
showing, Collections

CommentsController#create method, Form Controls

commit command (Git), Getting Started

commit message, Getting Started

Comparable module, include

Concurrent Version System (CVS), Version Control

conditional assignment (||=) operator, Booleans

conditional statements, Variables, Fragment Caching

for Edit button, Fragment Caching

config.action_controller.perform_caching setting, Caching

config.assets.debug setting, Debug Mode

config directory, Controller, Routing, Restricted Resources, Show User, Preventing CSRF, Debug Mode, Caching, Issues, Getting Started, Configuration, Database Setup, Chapter 11

deploy/production.rb file, Configuration

deploy.rb file, Getting Started

environments/development.rb file, Debug Mode, Caching, Issues

routes.rb file, Routing, Restricted Resources, Show User, Preventing CSRF, Chapter 11

logout route, Chapter 11

secrets.yml file, Database Setup

console command, The bundle Command

constants, Booleans

continue command (debugger), Debugger Commands

control flow, Variables, Embedded Ruby

controllers, Controller, Controllers, The Root Route, Paths and URLs, Controller Actions, Render or Redirect, Controller Tests, API Controllers

actions, Paths and URLs
API, API Controllers
helpers for, The Root Route
parameters, Controller Actions
response formats, Render or Redirect
testing, Controller Tests

controls on forms, helper methods for, Showing Comments

convention over configuration, Your First Rails Application

cookies, Response Formats, Database Setup

secret key for, Database Setup

cookies hash, Controller Tests

count method, Query Conditions

create action, Representational State Transfer, Controller Test Assertions, Controller Test Assertions

controller test for, Controller Test Assertions
POST request for, Controller Test Assertions

create command, in Heroku, Updating Your Gemfile

create comment action, controller for, Back to Controller Actions

created_at field, Rails Scaffold

create_join_table method, has_and_belongs_to_many

create method, Create, Read, Update, and Delete, Back to Controller Actions, Implementation, Examining SQL Output

for login form, Implementation
in SessionsController, Examining SQL Output

createuser command, for PostgreSQL, Installing Apache and Passenger

cross-site request forgery (CSRF), Layouts, Cross-Site Request Forgery Attacks, Using Token-Based Authentication

token, Using Token-Based Authentication

cross-site scripting (XSS), Bypassing an Authentication System

CRUD functions, Create, Read, Update, and Delete, Representational State Transfer

CSRF (cross-site request forgery), Layouts, Cross-Site Request Forgery Attacks, Using Token-Based Authentication

token, Using Token-Based Authentication

csrf_meta_tags method, stylesheet_link_tag

csrf-token meta tag, stylesheet_link_tag

CSS, Built-in Optimization Features (see Cascading Style Sheets (CSS))

Curl, Status Codes, Curl, API Controllers, Jbuilder, Using Token-Based Authentication, Chapter 13

to check index action output, Jbuilder
testing API, API Controllers
for testing token-based authentication, Curl

curly braces ({ }), Arrays, Iteration

for blocks, Iteration
for hashes, Arrays

current user, The Authentication System, Implementation, Authenticate User

authentication, The Authentication System
identifying, Implementation
using, Authenticate User

current_user method, Implementation, The debug Helper, Authenticating Requests

output of, The debug Helper

custom routes, Restricted Resources

CVS (Concurrent Version System), Version Control

D

data, testing, Testing Data

database adding columns, Create, Read, Update, and Delete, Create, Read, Update, and Delete, Migrations, Adding a Column, Representational State Transfer, Representational State Transfer, Paths and URLs

adding records, Create, Read, Update, and Delete
CRUD functions, Create, Read, Update, and Delete, Representational State Transfer
current state, Migrations
HTTP verbs for actions, Representational State Transfer
retrieving posts from, Paths and URLs

database migrations, The config Directory, Rails Scaffold, Query Conditions, Updating Your Gemfile, User Model, Post Models, Testing in Rails

and application deployment, Updating Your Gemfile
for creating table, User Model
preventing creation of, Post Models
updating db/schema.rb with, Testing in Rails

database queries, reducing, Turbolinks in Action

database.yml file, The config Directory

data model, Advanced Active Record, Advanced Active Record, Polymorphic Associations

advanced, Advanced Active Record
for social networking service, Polymorphic Associations

data types, Data Types, Data Types, Strings, Strings, Strings, Arrays, Hashes

arrays, Strings
Booleans, Hashes
hashes, Arrays
numbers, Data Types
strings, Strings
symbols, Strings

dbconsole command, The bundle Command

db directory, The config Directory, Query Conditions, Migrations

migrate directory, Query Conditions
schema.rb file, Migrations

db:rollback statement, Migrations

debugger method, Entering the Debugger, Chapter 13

debugging, Debugging, The debug Helper, Entering the Debugger

commands, Entering the Debugger
Rails logger for, The debug Helper

debug helper, The debug Helper

:debug log level, The debug Helper

debug mode, Manifests

def_delegators method, extend

define_method method, Duck Typing

def statement, Methods

delegation, prepend

delete method, Controller Tests

DELETE request, Representational State Transfer, Restricted Resources, URL Helpers

delete_via_redirect method, Controller Test Assertions

deleting records, Read

dependent: :destroy option, User Model

deploy:check task, Add to Git

deployment, Deployment, Custom Deployment, Virtual Private Servers, Installing Gems

Capistrano, Installing Gems
virtual private servers, Virtual Private Servers

DESC order, for retrieving posts, Delete

destroy action, Representational State Transfer, Chapter 11

destroy method, Read, Back to Controller Actions, Implementation, Chapter 8

for user_id, Implementation

development environment, debug mode, Debug Mode

development.log file, The config Directory

development.rb file, Controller

diff command (Git), Basic Usage

digital signature, Heroku

directives, in manifest files, Built-in Optimization Features

direct manipulation, The Post Model

directory, Rails Fundamentals, Installing Apache and Passenger

creating for Ruby on Rails, Installing Apache and Passenger
for Rails project, Rails Fundamentals

display command (debugger), Debugger Commands

distributed version control system, Version Control

div element, class="container", Authentication

division, math operation, Data Types

doctype (HTML5), Layouts

documentation, Authentication, Installing PostgreSQL

for Bootstrap, Authentication
from gems, Installing PostgreSQL

document root, for Virtual Host, Adding a Virtual Host

do, end pair, for adding block, Routing

Don’t Repeat Yourself (DRY), Don’t Repeat Yourself

do statement, Iteration

double-colon (::) operator, Modules

double-quotes ("), for strings, Strings

DRY (Don’t Repeat Yourself), Don’t Repeat Yourself

duck typing, Duck Typing

duplication, eliminating, Putting Assertions to Work

E

each method, Conditionals, Embedded Ruby

eager loading, N + 1 Queries

edit action, Representational State Transfer, Controller Actions

Edit button, conditional statement for, Fragment Caching

Eiffel, Ruby Fundamentals

Element class, instance methods of, Chapter 7

elements, Arrays, Layouts

adding to array end, Arrays
of web pages, Layouts

else statement, Variables

elsif statement, Variables

email address, The Authentication System, Post Index and Show

of current user, The Authentication System
storing, Post Index and Show

Embedded Ruby (ERB), Don’t Repeat Yourself, Views, Embedded Ruby, Control Flow

comments, Control Flow

Employee model, defining associations in, Self Join Associations

empty? method, Strings

end statement, Iteration, Methods, Modules

environments directory, Controller

equal (==) operator, Hashes

ERB (Embedded Ruby), Don’t Repeat Yourself, Views, Embedded Ruby, Control Flow

comments, Control Flow

error_explanation div element, Forms

error messages, The config Directory, Forms

code for displaying, Forms
files for, The config Directory

errors array, Testing Data

errors method, Chapter 4

/etc/apache2/sites-available directory, Adding a Virtual Host

eval command (debugger), Debugger Commands

exclamation mark (!), at end of method name, Strings

:exclusion validation, Validations

exit command, Interactive Ruby, The Post Model

extend statement, prepend

F

favcon.ico file, The public Directory

features, enabling and checking for, Duck Typing

fetch method, Caching

Fibonacci sequence, prepend

Fielding, Roy, Controllers

field_with_errors class, Form Errors

file.open method, passing block to, Iteration

file.read method, Inheritance

file.split method, Inheritance

find_by method, Authenticating Requests

find method, Read, Authorization Attacks

first method, Read

fixtures, Running Tests, Show User

flags, in Bundler, Updating Your Gemfile

flash hash, Controller Tests

flash messages, Response Formats, Sign Up

displaying, Sign Up

floating-point math, Data Types

flow between pages, testing, Controller Test Assertions

follow action, safety from CSRF attacks, Preventing CSRF

following? method, User Model

following! method, User Model

follow_redirect! method, Controller Test Assertions

foreign key, Advanced Active Record, has_and_belongs_to_many

in migration file, has_and_belongs_to_many

for loop, Conditionals, Form Errors

form builder object, Form Errors

form_for method, Form Errors, Form Controls

forms, Showing Comments

for comments, Form Controls

form_tag, Implementation

Forwardable module, prepend

Fowler, Martin, Patterns of Enterprise Application Architecture, The Post Model

fragment caching, Pagination, Low-Level Caching

friendly_date helper method, Number Helpers

full-stack web framework, Rails Fundamentals

functional tests, Controller Tests

G

garbage collection, optimization, Performance

gem command, The public Directory, Installing PostgreSQL

Gemfile, Heroku, Logging

adding debugger gem, Logging
updating for Heroku, Heroku

gems, Rails Fundamentals, Authentication, Authentication, Post Index and Show, Post Index and Show, Manifests, Pagination, Logging, Logging, as_json, Installing PostgreSQL, Installing PostgreSQL, Getting Started, Chapter 15

bcrypt, Post Index and Show
bootstrap_sass, Authentication
byebug, Logging
capistrano-rails, Getting Started
directories in asset pipeline searches, Manifests
documentation from, Installing PostgreSQL
installing, Installing PostgreSQL
jbuilder, as_json
updating installed, Authentication, Post Index and Show, Logging
will_paginate, Pagination

generate_api_token method, Generating Tokens

generate command, The bundle Command

get method, Controller Tests

GET request, Representational State Transfer, Restricted Resources, URL Helpers, Controller Test Assertions, Cross-Site Request Forgery Attacks

and state change, Cross-Site Request Forgery Attacks
test issuing, Controller Test Assertions

getter methods, Classes

get_via_redirect method, Controller Test Assertions

git add command, Getting Started

git branch command, Other Useful Commands

git checkout command, Other Useful Commands, Branches

git commit command, Getting Started

git diff command, Basic Usage

git --help command, Basic Usage

GitHub, Deploying Your Application, Database Setup, Chapter 5

account, Chapter 5
pushing code to, Database Setup

GitHub API, Web APIs, The GitHub API, Curl, Curl

authentication with, Curl
token generation, Curl

git log command, Getting Started

git pull command, Branches

git push command, Branches, Updating Your Gemfile

git remote add command, Branches

git status command, Basic Usage, Other Useful Commands

Git version control system, Deployment, Version Control, Version Control, Getting Started, Getting Started, Other Useful Commands, Branches, Database Setup

basic usage, Getting Started
branches, Other Useful Commands
getting started, Version Control
remotes, Branches
repository, creating, Database Setup
setup, Version Control
staging area of, Getting Started

greater than (>) operator, Hashes

greet method, Methods

H

Hansson, David Heinemeier, Rails Fundamentals

hashed version of password, Post Index and Show

hashes, Arrays, Iteration, Getting Started

for commit, Getting Started
iteration over, Iteration

hash rocket (=>), Arrays

has_many association, Advanced Active Record, Self Join Associations, Polymorphic Associations, User Model, Running Tests

has_many :leaders association, Authenticate User

has_many method, Adding Associations

has_many :through association, has_and_belongs_to_many, User Model

has_secure_password method, Post Index and Show, Running Tests

head element (HTML), Layouts

head method, Controller Tests

help command, for debugger, Debugger Commands

--help command (Git), Basic Usage

helpers, Don’t Repeat Yourself, The Root Route, Control Flow, Number Helpers, Showing Comments, Controller Tests, Controller Test Assertions

adding methods, Number Helpers
for controllers, The Root Route
controller test, Controller Tests
integration, Controller Test Assertions
methods for form controls, Showing Comments

helpers directory, Controller

Heroku cloud application platform, Deployment, Heroku, Heroku, Updating Your Gemfile

deploying application, Updating Your Gemfile
Gemfile update for, Heroku

heroku run command, Updating Your Gemfile

Heroku Toolbelt, installing, Introduction, Heroku

hex method, Generating Tokens

home page, The Root Route, Authenticate User

root route setting for application, The Root Route
timeline for, Authenticate User

HTML, partials for shared code, CSRF Meta Tags Helper

HTML5 field types, helper methods for, Form Controls

HTML page, Don’t Repeat Yourself, Layouts

Rails layout for, Layouts
Ruby code and, Don’t Repeat Yourself

HTTP, The GitHub API, The GitHub API

status codes, The GitHub API

HTTP verbs, Representational State Transfer, URL Helpers

for database actions, Representational State Transfer

I

identifiers, symbols as, Strings

id field, Rails Scaffold, Read

retrieving record by, Read

if statement, Variables, Chapter 10

ImagePost, User Fixtures, Model Tests, Authorization Attacks

editing, Authorization Attacks
fixture files for, User Fixtures
validation test, Model Tests

image_post_params method, Chapter 10

image_tag helper, Post Index and Show

img-responsive class (Bootstrap), Post Index and Show

include statement, for methods, Modules

:inclusion validation, Validations

index action, Representational State Transfer, Paths and URLs, The Authentication System, API Controllers

index for array, Arrays

index page, Number Helpers, The Authentication System

for post model, The Authentication System
for posts, Number Helpers

indices, creating for foreign keys, has_and_belongs_to_many

inheritance, Classes, Modules, has_many :through

in Ruby, Modules
single-table, has_many :through

initialize statement, Methods

injection attacks, Authorization Attacks

insecure direct object reference, Authorization Attacks

inspect method, Log Levels

installing, Introduction, Introduction, Introduction, Heroku, Amazon AWS Setup, Installing Ruby, Installing Apache and Passenger, Installing PostgreSQL, Installing PostgreSQL, Installing Gems

Apache, Installing Ruby
build tools, Installing PostgreSQL
gems, Installing PostgreSQL
Heroku Toolbelt, Introduction, Heroku
PostgreSQL, Installing Apache and Passenger
Rails, Introduction, Installing Gems
Ruby, Introduction, Amazon AWS Setup

instance, Classes, Virtual Private Servers

of class, creating, Classes

instance methods, Classes

instance_methods method, Ancestors

instance_of? method, Class

instance variables, Methods, Classes

accessing, Classes
assigning value to, Methods

instantiating objects, Create, Read, Update, and Delete

integer division, Data Types

integration tests, Controller Test Assertions

Interactive Ruby interpreter (IRB), Interactive Ruby

Internal Server Error code, Status Codes

introspection, Class

IRB (Interactive Ruby interpreter), Interactive Ruby

irb command, Interactive Ruby

is_a? method, Class

is-a relationship, Classes

:is validation, Validations

iteration, Conditionals

J

JavaScript, Layouts, Authentication, Built-in Optimization Features, Turbolinks in Action

asset pipeline and, Built-in Optimization Features
events, Turbolinks in Action
including in application, Authentication
list of files in use, Layouts

javascript_include_tag method, stylesheet_link_tag

JavaScript Object Notation (JSON), Don’t Repeat Yourself, Render or Redirect, Web APIs, The GitHub API, API Controllers

customizing output, API Controllers
messages, Web APIs

jbuilder gem, as_json

join table, Self Join Associations, has_and_belongs_to_many, User Model

creating, has_and_belongs_to_many
for many_to_many association, Self Join Associations

jq (JSON processor), API Controllers

JSON (JavaScript Object Notation), Don’t Repeat Yourself, Render or Redirect, Web APIs, The GitHub API, API Controllers

customizing output, API Controllers
messages, Web APIs

json.array! method, Jbuilder

json.extract! method, Jbuilder

K

Kernel class, Ancestors
keys method, Hashes
key-value pairs, Arrays

L

label helper, Form Errors

last method, Read

layouts for views, Layouts

leader_ids method, Authenticate User

leaders method, User Model

length method, Strings

:length validation, Validations

less than (<) operator, Hashes

lib/assets directory, Manifests

lib directory, The config Directory

libpq-dev package, Installing PostgreSQL

limit method, Delete

link_to helper, Control Flow

Lisp, Ruby Fundamentals

list command (debugger), Debugger Commands

local variables, Debugger Commands

log directory, The config Directory, User Fixtures, The debug Helper

development.log file, The debug Helper
test.log file, User Fixtures

logger (Rails), The debug Helper

log in, Restricted Resources, Sign Up, Sessions

custom routes for, Restricted Resources
implementing, Sessions

logout, custom routes for, Restricted Resources

low-level caching, Pagination, Caching

M

mailers directory, Controller

manifests, Layouts, Built-in Optimization Features

many-to-many associations, Self Join Associations

margins, for page, Authentication

master branch, Other Useful Commands

Math module, Modules

math operations, in IRB, Data Types

Matsumoto, Yukihiro, Ruby Fundamentals

maximum method, Query Conditions

:maximum validation, Validations

memcached server, Caching

memoization, include

Memoize module, calc method, prepend

Mercurial, Version Control

merge method, Hashes

metaprogramming, Advanced Ruby, Duck Typing

method_missing method, class_eval

methods, Hashes, Methods, Modules, Ancestors

include statement for, Modules
passing named parameters to, Hashes

migration files, rails generate command to create empty, has_and_belongs_to_many

migrations, Query Conditions

(see also database migrations)

minimum method, Query Conditions

:minimum validation, Validations

MiniTest framework, Testing, Post Fixtures

mistakes, Debugging (see debugging)

mixins, modules as, Modules

mkdir command, Rails Fundamentals

models, Models, Advanced Active Record, Post Models, Eliminating Duplication with Callbacks

adding validations to, Post Models
relationship between two of same type, Advanced Active Record
testing, Eliminating Duplication with Callbacks

model-view-controller (MVC), Don’t Repeat Yourself

module Api statement, API Controllers

module keyword, Modules

modules, Classes, Advanced Ruby, Modules, Modules, Modules

as mixins, Modules
as namespaces, Modules

modulus (%) operator, Data Types

MVC (model-view-controller), Don’t Repeat Yourself

MySQL, Installing Apache and Passenger

N

N + 1 Queries, Examining SQL Output

named parameters, passing to method, Hashes

names, Embedded Ruby, CSRF Meta Tags Helper, Modules

for modules, Modules
for partials, CSRF Meta Tags Helper
for templates, Embedded Ruby

namespaces, modules as, Modules

namespace :api block, Authentication

nano editor, Adding a Virtual Host

nested resources, Routing

network communications, Curl for, Status Codes

new action, Representational State Transfer, Controller Actions, Controller Test Assertions

controller test for, Controller Test Assertions

New Image Post form, button linking to, Chapter 10

newlines, in strings, Strings

new method, Classes, Implementation

for login form, Implementation

new post form, Render or Redirect, Back to Controller Actions, Showing Comments

params from, Back to Controller Actions
from Rails scaffold generator, Showing Comments

next command (debugger), Debugger Commands

nil, Interactive Ruby, Arrays, Arrays, Methods

from [] method, Arrays
from accessing nonexistent key, Arrays
for method definition, Methods

NoMethodError exception, Ancestors, Duck Typing, class_eval

not equal (!=) operator, Hashes

“not” form, of assertions, Post Fixtures

notice message, Sign Up

not operator, Conditionals

NOT operator, define_method

number helpers, URL Helpers

numbers, Data Types

number_to_currency method, URL Helpers

number_to_human method, URL Helpers

number_to_human_size method, URL Helpers

number_to_percentage method, Number Helpers

O

Object class, Ancestors

object_id method, Strings

objects, Methods, Create, Read, Update, and Delete

instantiating, Create, Read, Update, and Delete
state of, Methods

odd numbers, Data Types

offset method, Delete

one-to-many relationships, Testing Data

one-way hash, Post Index and Show

open-source software, collaborating on, Deploying Your Application

Open Web Application Security Project (OWASP), Summary

operation, canceling current, Interactive Ruby

optimization, Performance, Built-in Optimization Features, Built-in Optimization Features, Turbolinks in Action

asset pipeline, Built-in Optimization Features
built-in features, Built-in Optimization Features
of code, Turbolinks in Action
garbage collection, Performance

or (||) operator, Hashes

order clause, for timelines, Use Current User

order method, Delete

output tag (<%= %>), Embedded Ruby

output to screen, Interactive Ruby

OWASP (Open Web Application Security Project), Summary

P

Paas (Platform as a Service), Heroku

page rendering, speed of, Pagination

paginate method, Pagination

pagination, and optimization, N + 1 Queries

parameters, Hashes, Methods, Controller Actions

for methods, Methods
passing named, to method, Hashes

params, from new post form, Back to Controller Actions

params hash, Controller Actions, Create Post

:text_post key in, Create Post

parent model, Advanced Active Record

partials, CSRF Meta Tags Helper

password attribute, checking for, Running Tests

password_confirmation attribute, checking for, Running Tests

password digest, Post Index and Show

passwords, Post Index and Show, Examining SQL Output

authentication, Examining SQL Output
hashed version, Post Index and Show

patch method, Controller Tests

PATCH request, Representational State Transfer, URL Helpers

patch_via_redirect method, Controller Test Assertions

path helpers, The Root Route

Patterns of Enterprise Application Architecture (Fowler), The Post Model

PDF format, Render or Redirect

percentages, Number Helpers

performance, Performance, Built-in Optimization Features, Pagination

(see also optimization)
caching and, Pagination
of Ruby on Rails, Performance

Perl, Ruby Fundamentals

Personal Package Archive (PPA), Amazon AWS Setup

pg (PostgreSQL gem), Updating Your Gemfile, Installing Gems

installing, Installing Gems

Phusion Passenger, Installing Ruby

pipe character (|), Iteration

plaintext files, reading in Ruby, Inheritance

Platform as a Service (PaaS), Heroku

pluralize helper method, Low-Level Caching

polymorphic associations, Single-Table Inheritance

@post, Form Controls

@post.comments.build, Form Controls

post.comments.find method, The has_many Methods

PostController, logger statement, Log Levels

post fixtures, User Fixtures

PostgreSQL, installing, Installing Apache and Passenger

PostgreSQL database server, Updating Your Gemfile

PostgreSQL gem (pg), Updating Your Gemfile

post_id field, Testing Data

Post index view, Post Index and Show

post method, Controller Tests

post model, Models, User Model, The Authentication System

index and show pages for, The Authentication System

post_params method, Parameters

post:references option, Testing Data

POST request, Representational State Transfer, Restricted Resources, Render or Redirect, Authentication

adding repository with, Authentication

posts, Number Helpers, Show User, Authorization Attacks, Low-Level Caching

authorization to edit, Authorization Attacks
index page, Number Helpers
updating when comment is added, Low-Level Caching
user’s ability to add, Show User

PostsController, respond_to method, Authentication

PostsHelper module, Number Helpers

posts table, The Post Model, Adding a Column

adding string column to, Adding a Column

posts_url, Response Formats

post_via_redirect method, Controller Test Assertions, Testing a Flow

PPA (Personal Package Archive), Amazon AWS Setup

predicate method, User Model

prepend statement, include

:presence validation, Validations

presence validation, for email field, Sign Up

<pre> tags, for debug helper output, The debug Helper

pretty-printing, API Controllers, Chapter 6

JSON data, API Controllers
in Ruby, Chapter 6

printing Ruby code, Debugger Commands

print messages, by log levels, Log Levels

privileges, of users, Authorization Attacks

production environment, Debug Mode, The debug Helper

asset precompilation, Debug Mode
default log level, The debug Helper

production.rb file, Controller

programmer, ERB comments for notes, Control Flow

prompt, Interactive Ruby, Interactive Ruby

return to working, Interactive Ruby

protect_from_forgery method, Preventing CSRF, Using Token-Based Authentication

public/assets directory, Debug Mode

public directory, The config Directory

public key, Heroku

pull command (Git), Branches

pulling changes to server, Version Control

push command (Git), Branches, Updating Your Gemfile

pushing changes to server, Version Control

push method, extend

put method, Controller Tests

puts method, Interactive Ruby

put_via_redirect method, Controller Test Assertions

Q

Queries, N + 1, Examining SQL Output
query_by_attribute method, class_eval
question mark (?), at end of method name, Strings
quit command (IRB), Interactive Ruby
quotation marks, for strings, Strings

R

Rails, Introduction, Rails Fundamentals, Rails Fundamentals, Your First Rails Application, Don’t Repeat Yourself, The public Directory, Rails Scaffold, Testing in Rails, Installing Gems

architecture, Don’t Repeat Yourself
commands, The public Directory
confirming install, Rails Fundamentals
installing, Introduction, Installing Gems
principles, Your First Rails Application
scaffolding, Rails Scaffold
testing in, Testing in Rails

rails_12factor gem, for Heroku, Updating Your Gemfile

Rails application, Rails Fundamentals, Controller, Layouts, Advanced Ruby

assets in, Layouts
first, Rails Fundamentals
modules in, Advanced Ruby
structure, Controller

Rails.application.config.assets.paths setting, Manifests

Rails.cache.fetch method, Caching, Low-Level Caching

rails command, The bundle Command

Rails console, The Post Model, Chapter 8

launching, Chapter 8
starting, The Post Model

Rails counter cache, Low-Level Caching

Rails development environment, preparing, Testing in Rails

rails generate command, Rails Scaffold

Rails generator, Adding a Column, Back to Controller Actions, Showing Comments

for controller for comments, Back to Controller Actions
new post form from, Showing Comments

Rails logger, The debug Helper, The debug Helper

levels, The debug Helper

rails new command, Controller, The bundle Command, Chapter 5

directory structure created by, Controller

rails scaffold command, Chapter 6

rails server command, Rails Fundamentals, Form Controls

rake command, The config Directory, Rails Scaffold, Migrations, Debug Mode

to precompile assets, Debug Mode

rake db:migrate command, Updating Your Gemfile

random-number generator, Generating Tokens

read-eval-print loop (REPL), Interactive Ruby

read operation, Read

ready function (jQuery), Turbolinks in Action

records, Create, Read, Update, and Delete, Read, Read, Query Conditions

adding to database, Create, Read, Update, and Delete
counting, Query Conditions
deleting, Read
updating, Read

red-green-refactor, Testing a Flow

redirect? helper method, Controller Test Assertions

redirection, vs. rendering view, Parameters

redirect_to method, Render or Redirect

refactoring code, The public Directory

reflection, Class

regular expressions, method_missing

remainder, Data Types

remote add command (Git), Branches

remote repository, making local copy, Other Useful Commands

remove_column method, Adding a Column

rename_column method, Adding a Column

render action method, Render or Redirect

render command, CSRF Meta Tags Helper, Create Post

for form partial, Create Post
partials and, CSRF Meta Tags Helper

rendering view, vs. redirection, Parameters

repetition, avoiding, Don’t Repeat Yourself

REPL (read-eval-print loop), Interactive Ruby

repository, Deployment

Representational State Transfer (REST), Controllers

require directive, Built-in Optimization Features

require_self directive, stylesheet_link_tag, Built-in Optimization Features

require_tree directive, Built-in Optimization Features, Manifests

require_tree . statement, stylesheet_link_tag

resource route, Routing

resources :user sessions statement, Restricted Resources

respond_to :json method, Authenticating Requests

respond_to method, Back to Controller Actions, Authentication

respond_to? method, Duck Typing

respond_to_missing? method, method_missing

respond_with method, API Controllers

REST (Representational State Transfer), Controllers

restricted resources, Restricted Resources

return statement, Methods

reverse of subscription, User Model

robots.txt file, The public Directory

root route, The Root Route

route for sign-up page, Sign Up

routes.rb file, The config Directory

routing, Routing, Restricted Resources, The Root Route

custom routes, Restricted Resources
root route, The Root Route

Ruby, Introduction, Ruby Fundamentals, Interactive Ruby, Amazon AWS Setup

installing, Introduction, Amazon AWS Setup
interactive, Interactive Ruby

Ruby object model, Advanced Ruby, extend

Ruby on Rails, Rails Fundamentals, Performance, Installing Ruby, Installing Apache and Passenger, Chapter 15

application server for, Installing Ruby
creating directory for, Installing Apache and Passenger
performance, Performance
resources on, Chapter 15

Ruby Toolbox, Chapter 15

S

Sass, Built-in Optimization Features

schema, Migrations

schema_migrations database table, Migrations

schema.rb file, The config Directory

screen, output to, Interactive Ruby

secret key, for cookies, Database Setup

SECRET_KEY_BASE environment variable, Adding a Virtual Host

SecureRandom class, Generating Tokens

secure shell (SSH), authenticating over, Heroku

security, Security, Security, Authorization Attacks, Bypassing an Authentication System, Cross-Site Request Forgery Attacks

authorization attacks, Security
cross-site request forgery (CSRF), Cross-Site Request Forgery Attacks
cross-site scripting (XSS), Bypassing an Authentication System
injection attacks, Authorization Attacks

Seeds.rb file, The config Directory

self join associations, Advanced Active Record

server, Rails Fundamentals, Status Codes, Virtual Private Servers

(see also virtual private servers)
error status codes, Status Codes
launching, Rails Fundamentals

session hash, Controller Tests

sessions, Sign Up

set_post method, Paths and URLs

setter methods, Classes

setup method, Putting Assertions to Work, Model Tests

short circuit operators, Booleans

show action, Representational State Transfer, Paths and URLs, The Authentication System

show method, Controller

show page, The Authentication System, Testing a Flow, Chapter 11

for comments, Chapter 11
for post model, The Authentication System
for users, Testing a Flow

sign-up form, adding, Sign Up

sign-up page, adding route for, Sign Up

sign-up process, for users, Post Index and Show

single inheritance, Classes

single-table inheritance, has_many :through

size method, extend

sleep method, Fragment Caching

slice, in array, Arrays

Smalltalk, Ruby Fundamentals

snake case, Variables

snapshot, by Git, Getting Started

social networking application, Polymorphic Associations, Polymorphic Associations, Polymorphic Associations, User Model, Comment Model

comment model, Comment Model
data model for, Polymorphic Associations
post models, User Model
user model, Polymorphic Associations

software install, apt-get system for, Amazon AWS Setup

spaces between words, Strings

special characters, in strings, Strings

SQL, Create, Read, Update, and Delete, Injection Attacks, Turbolinks in Action, Examining SQL Output

commands, Create, Read, Update, and Delete
examining output, Examining SQL Output
injection attack, Injection Attacks
program optimization and, Turbolinks in Action

SQLite database, The config Directory

square brackets ([ ]), for array, Strings

SSH (secure shell), authenticating over, Heroku

stages in Capistrano, for application deployment, Installing Gems

staging area, of Git, Getting Started

state of application, Don’t Repeat Yourself

status codes, HTTP, The GitHub API

status command (Git), Basic Usage, Other Useful Commands

step command (debugger), Debugger Commands

stepping into application, Logging

strings, Strings

Strong Parameters, Parameters, Back to Controller Actions, Adding Comments

stylesheet_link_tag method, Layouts

submit helper, Form Controls

subscription, model to represent, User Model

subscriptions table, User Model

Subversion, Version Control

sum method, Query Conditions

symbols, Strings

T

tabs, in strings, Strings

tasks directory, The config Directory

TDD (test-driven development), The public Directory, Testing a Flow

adding features with, Testing a Flow

teardown method, Putting Assertions to Work

templates, in ERB, Embedded Ruby

test case, Running Tests

test directory, The public Directory, The public Directory, Testing in Rails, Running Tests, User Fixtures, User Fixtures, Controller Test Assertions, Controller Test Assertions, Testing a Flow, Testing a Flow, Show User, Create Post

controllers/posts_controller_test.rb file, Controller Test Assertions
controllers/text_posts_controller_test.rb file, Show User, Create Post
controllers/users_controller_test.rb file, Controller Test Assertions, Testing a Flow
fixtures/posts.yml file, User Fixtures
fixtures/users.yml file, Running Tests
integration/user_flow_test.rb file, Testing a Flow
models/user_test.rb file, Testing in Rails, User Fixtures
test_helper.rb script, The public Directory

test-driven development (TDD), The public Directory, Testing a Flow