Rails - Oct 2009 - Serach with Xapian

hey ,

am looking for xapian syntax to do a range search

in my code i have

  class Table < AR
    acts_as_xapian :texts => [:title],
                                :values => [[ :left, 0, "left",
:number
],[ :right, 1, "right", :number ] ],
                               :terms => [ [: left, ''L'',
"left"],[:right, ''R'', "right"]]
   end

and when a launch the following search in console i have an execption

  ActsAsXapian::Search.new([Table], ''left:1..100 AND
right:30..200'',
:limit => 100000).result

exception :

RuntimeError: QueryParserError: Unknown range operation
from
/Users/mecharek/tm/vendor/plugins/acts_as_xapian/lib/acts_as_xapian.rb:367:in
`parse_query''
from
/Users/mecharek/tm/vendor/plugins/acts_as_xapian/lib/acts_as_xapian.rb:367:in
`initialize''
from (irb):3:in `new''

someone can help me :(

thx
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