在symfony中插入\ double值與doctrine

Question

我有一個名爲Plato的類，它擴展了Producto witch包含deatribute precio。設置器定義如下：

public function setPrecio(\double $precio) 
{ 
    $this->precio = $precio; 

    return $this; 
} 

而且我想一個新的元素添加到數據庫與：

$plato = new Plato; 
$em = $this->getEntityManager(); 
// I have tryed this three ways to insert 
$plato->SetPrecio(doubleval($precio)); 
$plato->SetPrecio((double) 2); 
$plato->SetPrecio(2.0); 

$em->flush(); 

它給了我下面的錯誤信息：

Catchable Fatal Error: Argument 1 passed to Servinow\EntitiesBundle\Entity\Producto::setPrecio() must be an instance of double, double given, called in /Users/luis/git/servinowServer-luis/src/Servinow/EntitiesBundle/Entity/PlatoRepository.php on line 41 and defined in /Users/luis/git/servinowServer-luis/src/Servinow/EntitiesBundle/Entity/Producto.php line 169

Answer 1

修改setPrecio()功能

public function setPrecio($precio) 
{ 
    $this->precio = $precio; 

    return $this; 
} 

你可以使用類似的東西

gettype($precio)[...]; 
if(is_numeric($precio))[...]; 

類型控制，先設置成$this

記住

Type Hints can only be of the object and array (since PHP 5.1) type. Traditional type hinting with int and string isn't supported.