76 lines
2.0 KiB
Markdown
76 lines
2.0 KiB
Markdown
# Advanced configuration
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## Facets
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## Multiple indexes
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Multiple indexes can be created and searched independently, but if you wish to override an existing
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index with another, you can use the `$hide_ancestor` config.
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```php
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use SilverStripe\Assets\File;
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use My\Namespace\Index\MyIndex;
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class MyReplacementIndex extends MyIndex
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{
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private static $hide_ancestor = MyIndex::class;
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public function init()
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{
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parent::init();
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$this->addClass(File::class);
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$this->addFulltextField('Title');
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}
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}
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```
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You can also filter all indexes globally to a set of pre-defined classes if you wish to
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prevent any unknown indexes from being automatically included.
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```yaml
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SilverStripe\FullTextSearch\Search\FullTextSearch:
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indexes:
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- MyReplacementIndex
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- CoreSearchIndex
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```
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## Synonyms
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## Spell check
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## Boosting/Weighting
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Results aren't all created equal. Matches in some fields are more important
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than others; for example, a page `Title` might be considered more relevant to the user than terms in the `Content` field.
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To account for this, a "weighting" (or "boosting") factor can be applied to each searched field. The default value is `1.0`, anything below that will decrease the relevance, anything above increases it.
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To adjust the relative values, pass them in as the third argument to your `addSearchTerm()` call:
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```php
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use My\Namespace\Index\MyIndex;
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use SilverStripe\FullTextSearch\Search\Queries\SearchQuery;
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use Page;
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$query = SearchQuery::create()
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->addSearchTerm(
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'fire',
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null, // don't limit the classes to search
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[
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Page::class . '_Title' => 1.5,
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Page::class . '_Content' => 1.0,
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Page::class . '_SecretParagraph' => 0.1,
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]
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);
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$results = singleton(MyIndex::class)->search($query);
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```
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This will ensure that `Title` is given higher priority for matches than `Content`, which is well above `SecretParagraph`.
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## Indexing related objects
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## Subsites
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## Adding new fields
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