Ferret talk - Jul 2008 - filter_proc problem with limit

Hi list,

I have a problem grouping with ferret.

I''m using the filter_proc from Dave''s book as seen below

results = {}
group_by_proc = lambda do |doc_id, score, searcher|
	doc = searcher[doc_id]
		(results[doc[:pk_file_id]]||=[]) << doc[:filename] << doc[:path]
	next true
end


The problem is that if I use this it ignores my limit clause.

I set limit on 10 and I still get 5995 results and it takes several  
seconds.

How come the limit clause is ignored when using a filter_proc? How can  
I change this behaviour?


term = "wi"

bool1 = Ferret::Search::BooleanQuery.new()
bool1.add_query(Ferret::Search::PrefixQuery.new(:filename, "#{term}"))
bool1.add_query(Ferret::Search::PrefixQuery.new(:path, "#{term}"))

index.search(bool1, :limit => 10, :filter_proc => group_by_proc)

puts result.size
5995


Cheers,
Henke

Has anyone tried this?

I''m I the only one trying to group results from ferret?

Cheers,
Henke

1 jul 2008 kl. 14.43 skrev Henrik:
> Hi list,
>
> I have a problem grouping with ferret.
>
> I''m using the filter_proc from Dave''s book as seen below
>
> results = {}
> group_by_proc = lambda do |doc_id, score, searcher|
> 	doc = searcher[doc_id]
> 		(results[doc[:pk_file_id]]||=[]) << doc[:filename] <<
doc[:path]
> 	next true
> end
>
>
> The problem is that if I use this it ignores my limit clause.
>
> I set limit on 10 and I still get 5995 results and it takes several  
> seconds.
>
> How come the limit clause is ignored when using a filter_proc? How  
> can I change this behaviour?
>
>
> term = "wi"
>
> bool1 = Ferret::Search::BooleanQuery.new()
> bool1.add_query(Ferret::Search::PrefixQuery.new(:filename,
"#{term}"))
> bool1.add_query(Ferret::Search::PrefixQuery.new(:path,
"#{term}"))
>
> index.search(bool1, :limit => 10, :filter_proc => group_by_proc)
>
> puts result.size
> 5995
>
>
> Cheers,
> Henke
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