Book Image

Rails 4 Application Development HOTSHOT

By : Saurabh Bhatia
Book Image

Rails 4 Application Development HOTSHOT

By: Saurabh Bhatia

Overview of this book

<p>Rails is a rapidly moving, open source, web development framework, and keeping up to speed with it is a big task. You might have already built applications using it, but there have been significant changes in the syntax and semantic of the Rails framework in the latest upgrade.</p> <p>Rails 4 Application Development Hotshot shows you how to build the most popular types of applications using Rails 4, and highlights new ways to do things. The book also closely follows lots of the best practices, gems, and popular solutions already known to the community, and tracks the changes in these. This book brings new ideas to refactor and restructure code to make it perform better in production, and enables you to write production-ready code.</p>

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Rails 4 Application Development HOTSHOT
Saurabh Bhatia
Apr, 2014 | 378 pages
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Table of Contents (17 chapters)
Rails 4 Application Development HOTSHOT
Rails 4 Application Development HOTSHOT
Credits
Credits
About the Author
About the Author
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
A Social Recipe-sharing Website
A Social Recipe-sharing Website
Mission briefing
Creating mockups
Adding test data and creating tests
Adding categories
Creating and adding recipes
Creating associations – recipes and categories
Adding authentication
Beautifying your views
Mission accomplished
Hotshot challenges
2
Conference and Event RSVP Management
Conference and Event RSVP Management
Mission briefing
Creating and administrating events
Creating search-friendly URLs for events
Adding tags to events
Tagging-based search and tag cloud
Adding Gravatar for a user
Creating RSVPs for events
Adding event moderation
Creating "My events" to manage events created by users
Mission accomplished
Hotshot challenges
3
Creating an Online Social Pinboard
Creating an Online Social Pinboard
Mission briefing
Creating file uploads and image resizing
Creating an infinitely scrollable page
Creating a responsive grid layout
Adding a full-text search
Resharing the pins and creating modal boxes using jQuery
Enabling the application to send a mail
Securing an application from cross-site scripting or XSS
Mission accomplished
Hotshot challenges
4
Creating a Restaurant Menu Builder
Creating a Restaurant Menu Builder
Mission briefing
Creating organizations with sign up
Creating restaurants, menus, and items
Creating user roles
Creating plans
Creating subdomains
Adding multitenancy and reusable methods
Creating a monthly payment model, adding a free trial plan, and generate a monthly bill
Exporting data to a CSV format
Mission accomplished
Hotshot challenges
5
Building a Customizable Content Management System
Building a Customizable Content Management System
Mission briefing
Creating a separate admin area
Creating a CMS with the ability to create different types of pages
Managing page parts
Creating a Haml- and Sass-based template
Generating the content and pages
Implementing asset caching
Mission accomplished
Hotshot challenges
6
Creating an Analytics Dashboard using Rails and Mongoid
Creating an Analytics Dashboard using Rails and Mongoid
Mission briefing
Creating a MongoDB database
Creating a click-tracking mechanism
Creating a visit-tracking mechanism
Writing map-reduce and aggregation to fetch and analyze data
Creating a dashboard to display clicks and impression values
Creating a line graph of the daily click activity
Creating a bar graph of the daily visit activity
Creating a demographic-based donut chart
Mission accomplished
Hotshot challenges
7
Creating an API Mashup – Twitter and Google Maps
Creating an API Mashup – Twitter and Google Maps
Mission briefing
Creating an application login with Twitter
Calling all Twitter friends
Getting latitude and longitude details of the user's location
Passing Twitter data to the Google Maps API using Rails
Displaying friends on the map using the Google API
Creating points of interest – filter users based on their location
Mission accomplished
Hotshot challenges
8
API Only Application – Backend for a Mobile App
API Only Application – Backend for a Mobile App
Mission briefing
Creating, editing, and deleting notes
Arranging notes category wise
Sending join data via JSON
Creating an OAuth2 provider
Generating API keys
Securing the application
Mission accomplished
Hotshot challenges
9
Video Streaming Website using Rails and HTML5
Video Streaming Website using Rails and HTML5
Mission briefing
Uploading the video
Encoding the video
Displaying the video panel and playing the video
Caching the content – text and video
Queuing the job
Mission accomplished
Hotshot challenges
10
A Rails Engines-based E-Commerce Platform
A Rails Engines-based E-Commerce Platform
Mission briefing
Creating a category and product listing
Creating a shopping cart and an Add to Cart feature
Packaging the engine as a gem
Mounting the engine on a blank Rails application
Customizing and overriding the default classes
Mission accomplished
Hotshot challenges
Index
Index

Creating points of interest – filter users based on their location

Grouping similar information on the map according to a specific criteria is called points of interest. This is a term used for markers or points on the maps that can be categorized or grouped together. We will use locations as the points of interest in our application. We will call all the locations in our system and search the friends according to it. We will use the geocoder API to do this.

Engage thrusters

We will create location-based filters for our users in this task:

  1. The geocoder gem has a method called near, which takes the location string as the parameter and runs a spatial query on the database:

    1.9.3p327 :001 > user = User.first
1.9.3p327 :002 > user.friends.near("NY")

  2. We got six results when we searched for the term NY:

    1.9.3p327 :003 > user.friends.near("NY").length
  Friend Load (1.6ms)  SELECT friends.*, 3958.755864232 * 2 * ASIN(SQRT(POWER(SIN((40.7143528 - friends.latitude) * PI() / 180 / 2), 2) +...
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