Rails - Nov 2008 - named scope lambda string substitution problem

I have a complex named scope like the following.

named_scope :foo, lambda {|foo, bar|
    foo.each do |d|
      #foo = "this line doesn''t work #{s}"
      baz = "something like this works " + s
    end

    bar.each do |b|
    end
{
  :conditions => {''baz'' => 1}
}}

It does some pre-processing to calculate the :conditions hash. The
weird bit is that I get a bizarre syntax error when I try to use
double quoted strings with substitutions. If I use a syntax such as
"A"+str+"B" it''s ok, but "A#{str}B" is a
syntax error. Any thoughts?

I''ve tried to replicate it in pure ruby lambda functions but
wasn''t
able to, leading me to think it may be related to the named scope.

-Jeff

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