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We already covered the name attribute, so let's look at the list attribute: departments. Hmm, this might seems strange at first. Where does it come from ? Well, perhaps it makes much more sense to see this: list="%{departments}". Yes, it is in fact an expression on the ValueStack that will query our action for the departments we've setup before ! Then, why are we missing the %{..} ? The answer is twofold: you can still write %{departments}, and it would work as you expected. But you have to realize, that whatever you are going to iterate is going to be an expression ! So, being pretty lazy and with all this Ruby-on-rails 'minimalistic' code, we decided we might as well save you a couple of RSI-related finger moves and let you discard the %{..}.

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