Ruby

The best way to contribute to the Rails project is to submit a patch. This episode shows how to do exactly that. There's also a surprise at the end that you don't want to miss!

The Rails API docs are very useful but can be difficult to read. This episode will give some tips on reading the docs and mention a few alternative sites for accessing the API. Update: sorry about the broken movie, it should work now.

The Rails console is one of my favorite tools. This episode is packed with tips and tricks on how to get the most out of the console.

There are two different ways to set up a many-to-many association in Rails. In this episode you will see how to implement both ways along with some tips on choosing the right one for your project.

Sometimes you need to add complex/dynamic routes. This is often impossible to do in routes.rb, but do not worry. It can be accomplished with a catch-all route. See how in this episode.

This episode is packed with little RJS goodies. Learn the different ways to access an element, how to add "if" conditions and how to apply an effect to multiple elements.

RJS and AJAX can be difficult to debug. Many times you don't get any error message in the browser. Learn different techniques for solving these tricky problems in this episode.

This episode will walk you through adding AJAX functionality to a form using RJS. See how to easily update multiple elements on a page.

Several methods in rails take a hash of options as the last argument. If you are passing the same options to several methods, you can remove this duplication by using with_options. Learn all about it in this episode.

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.

If you try to create a helper method which accepts a block, you will run into a few gotchas. Learn the secrets of blocks in views in this episode.

When a validation error occurs, Rails helpfully wraps the field in a div tag so you can style it. But sometimes you don't want this behavior. In this episode you will see how to customize it.