Ferret talk - May 2007 - How to make a Tag cloud with Ferret ?

Hello,

I want to make a TAG CLOUD using ferret.
How can i do so ?

I would need to know the amount of keyword for every each words in the
index.


Thank you

-- 
Posted via http://www.ruby-forum.com/.

Hello,

See TermEnum documentation:

http://ferret.davebalmain.com/api/classes/Ferret/Index/TermEnum.html

John.

On Mon, 2007-05-14 at 17:17 +0200, py landanger wrote:
> Hello,
> 
> I want to make a TAG CLOUD using ferret.
> How can i do so ?
> 
> I would need to know the amount of keyword for every each words in the
> index.
> 
> 
> Thank you
> 
-- 
http://johnleach.co.uk

Thank you John  ^^

-- 
Posted via http://www.ruby-forum.com/.

Hey John..

well, thats a tough question, esp. as there is no ''general
rule'' on
how a tag could should
look like and which criteria should be taken into account..

http://www.omdb.org/encyclopedia

is based on ferret.. but we''re storing a :popularity for each tag..  
and ferret is simply
sorting its index using the popularity ..

here''s what we do [1]:

   def popular_categories_by_type( root_id )
     query = BooleanQuery.new
     query.add_query( TermQuery.new( :type,  
Category.to_s.downcase ), :must )
     query.add_query( TermQuery.new( :root_id, root_id.to_s ), :must )
     query.add_query( TermQuery.new( :is_assignable, ''1'' ),
:must )
     order = orderfield( [ "popularity".to_sym ], :type  
=> :integer, :reverse => true )
     objects = self.real_search( query, :limit => 30, :order => order )
   end

hope that helps ..

Ben

[1] http://bugs.omdb.org/browser/trunk/lib/omdb/ferret/local_search.rb