sql - Zend/db/Sql/ 查询语法

Question

我开始Zend Framework 2，我想用我的用户角色做出路由选择，我必须写getRoleByID($id)，

那我怎么写

" Select 'role' from user where ('id' = $id) "使用 Zend\Db\Sql

Answer 1

使用选择的示例：

$select = new \Zend\Db\Sql\Select('user');
$select->columns(array('role'));
$where = new Where();
$where->equalTo('id', $id);
$select->where($where);
/**
 * Simple example of executing a query...
 */
$stmt = $this->getSql()->prepareStatementForSqlObject($select);
$results = $stmt->execute();
/* @var $results \Zend\Db\Adapter\Driver\Pdo\Result */

if( ! $results->count()) {
     // do something, none found...
}

$row = $results->current(); 
return $row['role'];

// if you had multiple results to iterate over:
//$resultSet = new \Zend\Db\ResultSet\ResultSet();
//$resultSet->initialize($results);    
//$array = $resultSet->toArray();
//foreach($resultSet as $row) { /* ... */ }