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<?php
namespace app\db;
use app\Model;
use app\Application;
abstract class DbModel extends Model
{
abstract public function tableName(): string;
abstract public function attributes(): array;
abstract public function primaryKey(): string;
/* pomocne funkce do array_map */
private static function params($x)
{
return ":$x";
}
private static function attr($x)
{
return "$x = :$x";
}
public function save()
{
$tableName = $this->tableName();
$attributes = $this->attributes();
$params = array_map('self::params', $attributes);
$statement = Application::$app->db->prepare("
INSERT INTO $tableName (".implode(', ', $attributes) . ")
VALUES (".implode(', ', $params) . ")
");
foreach($attributes as $attribute) {
$statement->bindValue(":$attribute", $this->{$attribute});
}
$statement->execute();
return true;
}
public function findOne($where)
{
$tableName = static::tableName();
$attributes = array_keys($where);
$sql = implode ("AND ", array_map('self::attr', $attributes));
$statement = Application::$app->db->prepare("
SELECT * FROM $tableName WHERE $sql
");
foreach($where as $key => $item) {
$statement->bindValue(":$key", $item);
}
$statement->execute();
return $statement->fetchObject(static::class);
}
}