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Form Objects
Models have a tendency to become a complex mess as an application grows. In this episode you will learn a couple of techniques to extract form-behavior out into its own class.
(18 minutes)
Dynamic Forms
Learn how to add fields to a form dynamically using another form, complete with custom field types. It's fieldception!
(14 minutes)
More on Twitter Bootstrap
This episode continues on the Twitter Bootstrap project showing how to display flash messages, add form validations with SimpleForm, customize layout with variables, and switch to using Sass.
(12 minutes)
A Tour of State Machines
Here I show how three popular state machine gems can be used to clean up a list of boolean/datetime fields. I also show a custom solution which keeps track of the history of events.
(12 minutes)
Multitenancy with Scopes
A multi-tenant application can be difficult to implement because the data for each tenant must be completely separate. Here I show how to do this using subdomains and default scopes in Active Record.
(12 minutes)
STI and Polymorphic Associations
Single Table Inheritance (STI) can help organize branching logic into separate classes, but a polymorphic association may be a better fit if there are unique database columns.
(14 minutes)
Testing JavaScript with PhantomJS
PhantomJS allows us to test JavaScript without going through a browser window. Here I show how to do this using Capybara and Poltergeist. I also give some tips on handling database transactions and skipping javascript tests.
(10 minutes)
Hstore
With hstore you can add schema-less data to PostgreSQL. This allows you to store model attributes without creating separate database columns. Watch how to do this using the activerecord-postgres-hstore gem.
(10 minutes)
PayPal Recurring Billing
Here I show how to add PayPal recurring payments to an existing checkout process using PayPal's Express Checkout and the paypal-recurring gem.
(24 minutes)
Rails Modularity
Rails is a modular framework allowing you to include only what you need. Here I show how the smallest Rails app works, and then I take a look at how to whittle down a full Rails application stack.
(13 minutes)