write custom query with zend framework 2 - mysql

Question

I want to perform a custom query in zf2. Now I have a Album controller and AlbumTable. Inside AlbumTable, I want to perform an join operation. But I am unable to do this.Please give me some suggation.
below my code:
namespace WebApp\Table;
use Zend\Db\TableGateway\TableGateway;
use Zend\Db\Sql\Sql;
new Zend\Db\Adapter\Adapter;
class UserTable
{
protected $tableGateway;
public function __construct(TableGateway $tableGateway)
{
$this->tableGateway = $tableGateway;
}
public function searchUser($search)
{
$search = "mehedi";
$adapter = new Adapter();
$sql = new Sql($adapter);
$select = $sql->select();
$select->from('foo');
$select->join('profiles', 'user.user_id = profiles.ownerId', array('name'));
$select->where(array('id' => 2));
$statement = $sql->prepareStatementForSqlObject($select);
$results = $statement->execute();
return $results;
}
}

Answer 1

The issue is you are trying to instantiate your Adapter with no parameters, when it requires at least a driver :
$adapter = new Adapter(); // Bad
$adapter = new Adapter($driver); // ..
You should use the ServiceManager to get your Adapter, did you start with the Skeleton Application?
It should have already been injected into the TableGateway for you..
$adapter = $this->getAdapter();
An example of instantiating an Adapter:
$config = $serviceLocator->get('Config');
$adapter = new Adapter($config['db']);
where you specify your setup inside your config, local.php will do:
return array(
/**
* Database Config
*/
'db' => array(
'driver' => 'pdo',
'dsn' => 'mysql:dbname=dbname;host=localhost',
'username' => 'root',
'password' => 'password',
),

Answer 2

I got some solution of this problem with helping all of here.
$adapter = $this->tableGateway->getAdapter();
/* $adapter variable is used to fetch Adapter
configuration from serivce manager. */
$sql = new Sql($adapter);
$select = $sql->select();
$select->from('foo');
$select->join('profile', 'foo.skillId = profile.id', array('name'));
$statement = $sql->prepareStatementForSqlObject($select);
$results = $statement->execute();
/* if you want you can see your
desired output in here. */
foreach ($results as $person) {
echo "<pre>";
print_r($person);
}
return $results;

Answer 3

It's because the join method expects an array for the join table. Also I personally would prefix the tables in the query, something like this:-
$search = "mehedi";
$adapter = new Adapter();
$sql = new Sql($adapter);
$select = $sql->select();
// PREFIXED THE foo table f
$select->from(array('f' =>'foo'));
// PREFIXED THE profiles table p
$select->join(array('p' => 'profiles'), 'user.user_id = profiles.ownerId', array('name'));
$select->where(array('id' => 2));
$statement = $sql->prepareStatementForSqlObject($select);
$results = $statement->execute();
return $results;