Jeff Dean's Ruby Blog - Form-backing objects for fun and profit

I approve of this technique for doing form presenters in rails 3

In this post I'll make the case for why form-backing objects help keep your app's codebase clean and maintanable, and I'll show how to create, use and test a form-backing object. Imagine that you are building a website where users can register and your stories look something like this: When a visitor registers a User record and Business record are created The user must accept the terms of service The user must correctly answer a simple math or logic question to ward off bots The site should log the IP address the of the user who registered After the registration is complete, the user should get an email If there are any problems or validation errors during registration, no User or Business should be created and nothing should be logged These are pretty straightforward requirements, so you start coding: Take 1: The Fat Controller The first version might look something like ...

Full article: http://pivotallabs.com/users/jdean/blog/articles/1706-for...