2008-08-06 05:28:25 +02:00
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<?php
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2008-08-09 08:40:50 +02:00
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/**
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2012-04-12 08:02:46 +02:00
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* @package framework
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2008-08-09 08:40:50 +02:00
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* @subpackage search
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*/
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2008-08-06 05:28:25 +02:00
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/**
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2008-08-09 06:38:44 +02:00
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* Filters by full-text matching on the given field.
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*
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* Full-text indexes are only available with MyISAM tables. The following column types are
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* supported:
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* - Char
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* - Varchar
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* - Text
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*
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* To enable full-text matching on fields, you also need to add an index to the
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* database table, using the {$indexes} hash in your DataObject subclass:
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2014-08-15 08:53:05 +02:00
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*
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2008-08-09 06:38:44 +02:00
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* <code>
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2014-05-25 02:46:07 +02:00
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* private static $indexes = array(
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2008-08-09 06:38:44 +02:00
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* 'SearchFields' => 'fulltext(Name, Title, Description)'
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* );
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* </code>
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2008-08-06 05:28:25 +02:00
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*
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2014-05-25 02:46:07 +02:00
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* @todo Add support for databases besides MySQL
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2008-08-06 05:28:25 +02:00
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*/
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2008-08-09 05:54:55 +02:00
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class FulltextFilter extends SearchFilter {
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2008-08-09 06:06:52 +02:00
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2012-09-06 09:54:44 +02:00
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protected function applyOne(DataQuery $query) {
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2014-05-25 02:46:07 +02:00
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$this->model = $query->applyRelation($this->relation);
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2013-06-21 00:32:08 +02:00
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$predicate = sprintf("MATCH (%s) AGAINST (?)", $this->getDbName());
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return $query->where(array($predicate => $this->getValue()));
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2008-08-09 06:06:52 +02:00
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}
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2008-08-09 06:38:44 +02:00
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2012-09-06 09:54:44 +02:00
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protected function excludeOne(DataQuery $query) {
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2014-05-25 02:46:07 +02:00
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$this->model = $query->applyRelation($this->relation);
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2013-06-21 00:32:08 +02:00
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$predicate = sprintf("NOT MATCH (%s) AGAINST (?)", $this->getDbName());
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return $query->where(array($predicate => $this->getValue()));
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2012-09-06 09:54:44 +02:00
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}
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2008-08-11 02:03:57 +02:00
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public function isEmpty() {
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2012-09-06 09:54:44 +02:00
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return $this->getValue() === array() || $this->getValue() === null || $this->getValue() === '';
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2008-08-11 02:03:57 +02:00
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}
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2014-05-25 02:46:07 +02:00
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/**
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* This implementation allows for a list of columns to be passed into MATCH() instead of just one.
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*
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* @example
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* <code>
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* MyDataObject::get()->filter('SearchFields:fulltext', 'search term')
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* </code>
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*
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* @return string
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*/
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public function getDbName() {
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$indexes = Config::inst()->get($this->model, "indexes");
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if(is_array($indexes) && array_key_exists($this->getName(), $indexes)) {
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$index = $indexes[$this->getName()];
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if(is_array($index) && array_key_exists("value", $index)) {
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2015-08-05 08:41:44 +02:00
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return $this->prepareColumns($index['value']);
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2014-05-25 02:46:07 +02:00
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} else {
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// Parse a fulltext string (eg. fulltext ("ColumnA", "ColumnB")) to figure out which columns
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// we need to search.
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2015-01-29 00:48:46 +01:00
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if(preg_match('/^fulltext\s+\((.+)\)$/i', $index, $matches)) {
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2015-08-05 08:41:44 +02:00
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return $this->prepareColumns($matches[1]);
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2014-05-25 02:46:07 +02:00
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} else {
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throw new Exception("Invalid fulltext index format for '" . $this->getName()
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. "' on '" . $this->model . "'");
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}
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}
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2015-01-29 00:48:46 +01:00
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}
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return parent::getDbName();
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2014-05-25 02:46:07 +02:00
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}
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2015-10-06 17:58:22 +02:00
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/**
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* Adds table identifier to the every column.
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* Columns must have table identifier to prevent duplicate column name error.
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*
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* @return string
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*/
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protected function prepareColumns($columns) {
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$cols = preg_split('/"?\s*,\s*"?/', trim($columns, '(") '));
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$class = ClassInfo::table_for_object_field($this->model, current($cols));
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$cols = array_map(function($col) use ($class) {
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return sprintf('"%s"."%s"', $class, $col);
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}, $cols);
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return implode(',', $cols);
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2015-08-05 08:41:44 +02:00
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}
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2014-05-25 02:46:07 +02:00
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2008-08-06 05:28:25 +02:00
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}
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