Latest Screencasts (page 2)

Sequel is an awesome Ruby library for working with databases. As opposed to ActiveRecord and DataMapper, which are based on working with model objects, Sequel is meant to be used to directly query a database, without needed to go through an object relational mapper. You can use models and associations...

Scott Motte introduces us to the document-oriented database MongoDB and shows how to use MongoDB as an alternative to MySQL and ActiveRecord using the MongoMapper gem. This talk was part of the DjangoSD/SD Ruby mashup meeting. Bonus content: download the slides from this talk.

In this screencast, you will see the basic CRUD operation using MongoDB shell. This is the first installment of a series on MongoDB.

In Ruby Essential Training, expert instructor Kevin Skoglund teaches the fundamentals of Ruby, the popular object-oriented open-source programming language. Kevin begins by walking through the basic data types, demonstrating Ruby's control structures (loops, iterators, conditionals, and code blocks) and showcasing the elegant syntax structure of the language. Kevin explains variable...

Rails 2.3.4 includes a conventional way to add seed data to your application - no more including it in the migration files.

MySQL is by far the most popular database management system for small- to medium-sized web projects. In MySQL Essential Training, instructor Bill Weinman provides clear, concise instruction in the tools needed to create and maintain a database. Bill explores the different data types MySQL supports, and the functions it provides,...

Covered in this Episode: What is YAML Why should you use YAML? Storing Data Transcript: Hello Everybody and welcome to Programming With Ruby Episode 14, YAML. I’m Tyler and this video is brought to you by manwithcode.com. I will start off this episode telling you what YAML is and why you should be using it. [...] .

In this second screencast we start out by learning the differences between the myISAM and InnoDB database engines for MySQL.  Next we learn how to scale a write heavy database by using Master Master replication, and how we might configure this to work with our Rails application.  Lastly we’ll figure out how to shard our database by spliting our tables between multiple databases and show how both New Relic and eBay take advantage of this technique.

If the bottleneck of your application is your database even after caching as much as possible, what can you do? This is the first of two screencasts where we’re going to learn about techniques for increasing the power of your Database. In this first video we learn how to grow our database step by step using both vertical and horizontal scaling.

Let's face it. Migrating legacy data into a new app is a giant pain in the ass. It's slow, error prone, and a ton of work. What if you could import old data into a new app before it's finished? Normalize fields? Clean up old data? And migrate often? Patrick Crowley shows the way. Bonus content: download the slides from this talk.