问不能使用"use Illuminate\Support\Collection;“

EN

当我尝试使用像all()或keyBy()这样的方法时，会得到类似这样的错误："use Illuminate\Support\Collection;“说明它没有使用它。

BadMethodCallException in Builder.php line 2025: Call to undefined method Illuminate\Database\Query\Builder::all()

$myArray = Item::whereitem_url($item->item_url)->all(); 
if( sizeof($myArray) > 0 ) 
{ 
    foreach ($myArray as $key => $value) 
    { 
       $myArray2[$value->iten_id] = $value; 
    }
}