php lucene如何更新和删除索引文件中的行

Question

用户有时会更改帖子的内容，实际数据库中的内容字段会更新。

我怎样才能获得索引文件更新的相同字段？

当用户删除帖子时，我如何在索引文件中删除该帖子？

Answer 1

我在 Symfony 中使用了 lucene 搜索，下面是我的使用方法：

// Called when an object is saved
public function save(Doctrine_Connection $conn = null) {
    $conn = $conn ? $conn : $this->getTable()->getConnection();
    $conn->beginTransaction();
    try {
        $ret = parent::save($conn);

        $this->updateLuceneIndex();

        $conn->commit();

        return $ret;
    } catch (Exception $e) {
        $conn->rollBack();
        throw $e;
    }
}

public function updateLuceneIndex() {
    $index = $this->getTable()->getLuceneIndex();

    // remove existing entries
    foreach ($index->find('pk:' . $this->getId()) as $hit) {
        $index->delete($hit->id);
    }

    $doc = new Zend_Search_Lucene_Document();

    // store job primary key to identify it in the search results
    $doc->addField(Zend_Search_Lucene_Field::UnIndexed('pk', $this->getId()));

    // index job fields
    $doc->addField(Zend_Search_Lucene_Field::unStored('title', Utils::stripAccent($this->getTitle()), 'utf-8'));
    $doc->addField(Zend_Search_Lucene_Field::unStored('summary', Utils::stripAccent($this->getSummary()), 'utf-8'));

    // add job to the index
    $index->addDocument($doc);
    $index->commit();
}

// Called when an object is deleted
public function delete(Doctrine_Connection $conn = null) {
    $index = $this->getTable()->getLuceneIndex();

    foreach ($index->find('pk:' . $this->getId()) as $hit) {
        $index->delete($hit->id);
    }

    return parent::delete($conn);
}

这是我获取索引的方式：

public static function getInstance() {
    return Doctrine_Core::getTable('Work');
}

static public function getLuceneIndexFile() {
    return sfConfig::get('sf_data_dir') . '/indexes/work.' . sfConfig::get('sf_environment') . '.index';
}

static public function getLuceneIndex() {
    ProjectConfiguration::registerZend();

    if (file_exists($index = self::getLuceneIndexFile())) {

        return Zend_Search_Lucene::open($index);
    } else {
        return Zend_Search_Lucene::create($index);
    }
}

希望对你有所帮助；）