Rails - Oct 2008 - Easily finding attributes from Ext.grid.GroupingView's xml calls

I have a ext.GroupingView grid that paginates, filters, and obviously groups.

The combination of these options is both awesome and beyond the scope
of this discussion.

The problem is, the params request when a user wants a new set of
results is something that bears no resemblance to the database schema.

I''ve ended up doing something like this:
http://pastebin.com/m7d998444

That looks like hell, I''m not sure it works, and I dread the idea of
maintaining it.

Is there a better solution out there? For those not wanting to look at
the horrors beyond that link, I need something to take a filter string
with a value, an offset, a group key, a limit, a sort key with
ASC|DESC, and turn it into a query that spits out an array of objects
sorted first by group and then again by sort.

Thanks in advance -

Alex

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