I am trying to return a new instance of my User class via a DAO, and am struggling to see if it is working, it certainly isn't working as I expected, as I am not defining User properties, yet I am still seeing all the User fields and values from the database.
class Database
class Database
{
private $dbh;
public function __construct()
{
$this->openConnection();
}
private function openConnection()
{
try {
$this->dbh = new PDO('mysql:host=localhost; dbname=stats', 'user', 'pass');
$this->dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch (PDOException $e) {
'There was an error connecting to the database, error: ' . $e->getMessage();
}
}
public function query($sql, $params)
{
$stmt = $this->dbh->prepare($sql, $params);
$stmt->execute($params);
return $stmt;
}
}
class UserDao
class UserDao
{
private $db;
public function __construct($db)
{
$this->db = $db;
}
public function findById($ward_code)
{
$record = $this->db->query("SELECT * from ward_statistics where WardCode = :WardCode", array(':WardCode' => $ward_code));
$record->setFetchMode(PDO::FETCH_CLASS, 'User')
$user = $record->fetch();
return $user;
}
}
class User
class User
{
// with no properties defined, I still get a
// full result set from UserDAO::findById()
}
Usage
$db = new Database();
$dao = new UserDao($db);
$user = $dao->findById('AMED');
var_dump($user);
Results in an object with a full result set from the DB (a single row that is - matched by the WardCode), with all fields populated with the correct values (from the DB).
Whilst this seems OK - I thought that PDO::FETCH_CLASS required the properties to available within the class.
My worry is, from a question I posted on Code Review a few days ago, I was also told that class methods such as the findById one should create new class instances, or update the existing one, yet all I seem to be doing is retrieving a row from the database.
Thanks
Replace fetchAll
with fetch
if you need just 1 object. According to documentation :
PDOStatement::fetchAll — Returns an array containing all of the result set rows
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