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Additional docs on specifying search fields and boosting

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Sean Harvey 2013-02-13 09:54:01 +13:00
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docs/Solr.md
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@ -196,6 +196,46 @@ In there, change the following directive:
Don't forget to copy the new configuration via a call to the `Solr_Configure`
task, and reindex your data before using the spell checker.
### Limiting search fields
Solr has a way of specifying which fields to search on. You specify these
fields as a parameter to `SearchQuery`.
In the following example, we're telling Solr to *only* search the
`Title` and `Content` fields. Note that the fields must be specified in
the search parameters as "composite fields", which means they should be
specified in the form of `{table}_{field}`.
These fields are defined in the schema.xml file that gets sent to Solr.
$query = new SearchQuery();
$query->classes = array(array('class' => 'Page', 'includeSubclasses' => true));
$query->search('someterms', array('SiteTree_Title', 'SiteTree_Content'));
$result = singleton('SolrSearchIndex')->search($query, -1, -1);
// the request to Solr would be:
// q=(SiteTree_Title:Lorem+OR+SiteTree_Content:Lorem)
### Configuring boosts on fields
Solr has a way of specifying which fields should be boosted as a parameter to `SearchQuery`.
This means if you boost a certain field, search query matches on that field will be considered
higher relevance than other fields with matches, and therefore those results will be closer
to the top of the results.
In this example, we enter "Lorem" as the search term, and boost the `Content` field:
$query = new SearchQuery();
$query->classes = array(array('class' => 'Page', 'includeSubclasses' => true));
$query->search('Lorem', null, array('SiteTree_Content' => 2));
$result = singleton('SolrSearchIndex')->search($query, -1, -1);
// the request to Solr would be:
// q=SiteTree_Content:Lorem^2
More information on [relevancy on the Solr wiki](http://wiki.apache.org/solr/SolrRelevancyFAQ).
### Custom Types
Solr supports custom field type definitions which are written to its XML schema.