If you want to get version information about a gem the easiest way to do it is with this command gem list For example gem list activemerchant will output the activemerchant versions I have installed. You can pass only part of the name like gem list ...

To make child attributes accessible to your model through a nested forms (Rails 2.3) you'll need to add the "#{child_class}_attributes" to the attr_accessible method in your parent class. If you don't use attr_accessible in your parent model (you would do...

Foreman is a process management gem for ruby applications. It is used in combination with a Procfile for configuration instructions. A typical Procfile looks something like this [name] : [script to execute] Example Rack application Procfile ...

Ruby is beautiful @posts = if true Post.all else [] end Simply elegant!

In the view there is a regular Rails form and a javascript function that will be triggered when the country select field is changed. The javascript function will make an ajax request to the country_select url with the country code passed as the id variabl...