Throughout this chapter, we've grown a user interface over the solid model we built in Chapter 4. Rather than using simple scaffold-style controllers and views, we've dug deep into the patterns and techniques you will need to implement complex functionality in real-world applications.

Even with this level of coverage, there is still an embarrassment of riches to be discovered in Rails: we have only scratched the surface of what's possible. However, you can hopefully see how the template system, helpers, filters, and observers provide an excellent foundation for creating minimal, powerful code, and get an idea of how models, views, and controllers fit together.

In the next chapter, armed with a fully-functional Intranet application, we will see how to deploy to a production server, ready for the assault of real users.