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Self-Referential Association
Creating a social networking site often requires a self-referential association on the User model to define friends/followers. In this episode I show how to do exactly that.
(14 minutes)
Seed Data
Rails 2.3.4 includes a conventional way to add seed data to your application - no more including it in the migration files.
(7 minutes)
Caching in Rails 2.1
Rails 2.1 brings some new caching features which makes it very easy to cache any values including models. See how in this episode.
(8 minutes)
Create Model Through Text Field
Let's say you provide a select menu for setting which category a given product belongs to, but you also want the option of creating a new category by typing the name in a text field. See a great way to do that in this episode.
(5 minutes)
named_scope
The named_scope method in Rails 2.1 makes performing finds on models very elegant and convenient. See how in this episode.
(11 minutes)
Feed Parsing
Learn two different techniques for parsing an RSS feed using Feedzirra in this episode!
(10 minutes)
Tracking Attribute Changes
Rails 2.1 keeps track of the changes you make to a model's attributes. It also allows you to see what the previous value was. But watch out for the gotcha! See this episode for details.
(7 minutes)
Integrating Active Merchant
In this episode I show how to add Active Merchant's functionality to a Rails application to make a fully-functional checkout process.
(18 minutes)
Hackers Love Mass Assignment
Your site may be at risk! When using mass assignment, you are giving the user complete control over that model and its associations. See how a hacker might use this vulnerability and learn how to stop it in this episode.
(6 minutes)
Conditional Validations
By default, validations will take place every time the model is saved. Sometimes you only want a validation to happen when certain conditions are met. See how to do that in this episode.
(4 minutes)