RailsCasts (Mobile)

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.

If you have a form with multiple buttons, you can detect which button was clicked by checking the passed parameters. Learn how in this episode.

A search form is quite different than other forms, this is because it does not deal with model's attributes. See a good way to add a simple search form in this episode.

This episode will walk you through setting up a Rails project on subversion. It covers some helpful tips and gotchas you may experience along the way.

REST adds many constraints. It restricts your controllers to seven actions. Normally this is okay, but sometimes you need to add your own custom actions. Learn how in this episode.

When you add a custom route, make it a named route so you have url helper methods to easily link to that new route. See episode for details.

You can sometimes remove a lot of duplication by generating methods dynamic. In this episode I will show you how to create a plugin which does exactly that.

Although Rails does allow you to edit time attributes with text fields, it's not very flexible. In this episode you will learn how to use a virtual attribute to format the time to your liking.