Xapian discuss - Jul 2007 - Making Spelling Suggestion/Correction Work!

Hello All,

I have found solutions to my previous issues and have stumbled upon a new
one. Spelling suggestion. I can't get it to work. I index my documents as
usual, then I run this code in PHP:

        //create a query parser
        $query_parser = new XapianQueryParser();
        $query_parser->set_default_op(XapianQuery::OP_AND);

        $rp = new XapianDateValueRangeProcessor(0, true);
        $query_parser->add_valuerangeprocessor($rp);

        //set the stemmer and turn on the stemming strategy
        $stemmer = new XapianStem("english");
        $query_parser->set_stemmer($stemmer);
        $query_parser->set_stemming_strategy(XapianQueryParser::STEM_SOME);

        //set the database
        $query_parser->set_database($db);

        //set prefix
        $query_parser->add_boolean_prefix("category",
"XC");
        //add prefix so you can search within titles
        $query_parser->add_prefix("title", "S");

        //create enquire object
        $enq = new XapianEnquire($db);

        //parse and create the query
        $query = $query_parser->parse_query($_REQUEST["search"],
XapianQueryParser::FLAG_SPELLING_CORRECTION);
        if (strlen(trim($_REQUEST["broad_category_id"])) > 0) {
            $query = new XapianQuery(XapianQuery::OP_FILTER, $query, new
XapianQuery("XC" . $_REQUEST["broad_category_id"]));
        }

        $var =  $query_parser->get_corrected_query_string();
        echo $var . "\n";

I type in mispelled words like "edcation" and "scool" but
get nothing. The
words "education" and "school" return results so I'm
assuming those words
are in the spelling database. However, I don't know. I just index documents
as usual without manually creating a separate spelling database. Should I?
This seems like such a cool feature, I'm dying to get it to work. If anyone
can shed some light on this, I'd really appreciate it. Thanks for reading.

Benny

Benny Chan wrote:
> Hello All,
> 
> I have found solutions to my previous issues and have stumbled upon a new
> one. Spelling suggestion. I can't get it to work. I index my documents
as
> usual, then I run this code in PHP:
> 
...
> 
> I type in mispelled words like "edcation" and "scool"
but get nothing. The
> words "education" and "school" return results so
I'm assuming those words
> are in the spelling database. However, I don't know. I just index
documents
> as usual without manually creating a separate spelling database.
Yes, you need to add words to the spelling database explicitly.  You can 
use the WritableDatabase::add_spelling() method to do this, or the 
FLAG_SPELLING option of the termgenerator to do so.  I don't think 
scriptindex has support for adding spellings to the spelling correction 
database yet, though.

-- 
Richard