If you’re an intermediate or advanced Rails developer looking to dig deeper and make the Rails framework work for you, this is your book. We’ll go beyond the basics of Rails; instead of showing how Rails lets you use its built-in features to render HTML or XML from a controller, I’ll show you how the render method works so you can modify it to accept custom options, such as :pdf.
All projects in Crafting Rails 4 Applications were developed and tested against Rails 4.0.0. Future stable releases, like Rails 4.0.1, 4.0.2, and so forth, should be suitable as well. You can check your Rails version with the following command:
And you can use gem install to get the most appropriate version: