This is a demonstration how to implement cascading selects on the complex forms. This is a case when you select one item and it should influence changing to the related select. For example on the creation events form I want to see 2 selects: country and state, when I choose country then states of this country should be populated to the state drop-down.
git clone git@github.com:railsguides/dynamic-selectable-demo.gitcd dynamic-selectable-demobundle installrake db:migraterake db:fixtures:loadrails s
And the go to http://localhost:3000