This is probably really straightforward, but I haven't been able to
work out how to build a search into a Merb form and secondly how to
build a form to enter criteria for a SQL search.

For instance, if I have a list of authors, how would a have a field on
the form that users could enter "Br%" with a 'search' button and get
the parameter back to the index ( eg: @authors = Author.all
(:surname.like => 'Br%')

Secondly - and for all I know it's related (!) - if I wanted to list
books and authors, I might have a general search form that had fields
the user could fill in, and build a query with non-blank values.  Then
I could use the query as the basis for another form to display the
details.

Any pointers would be greatly valued - thanks.

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