Thank you for the reply Simon. What you said worked for me, although I
did it in a rather inelegant way -- I'm not sure about the correct
syntax of my solution, but it works. It requires creating a string with
the ids in parens...
book_ids = "(100, 101, 102)"
chapters= Chapter.find(:all, :include => :books, :conditions =>
["books.id in #{book_ids} and chapter='2'"]
Any suggestions for clearer code welcome, but thank you for your help!
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