Php Laravel 5.4：循环数组并减去每个对象的数量，直到数量达到0为止

我需要循环遍历数组，并从每个对象减去

所需的数量

例如所需数量=22

这个数组中有三个对象，每个对象的数量=10

所以会是这样的

从到期日起取10件=2019-03-02库存将变为0
从到期日起取10件=2019-03-10库存将变为0
从过期日期取2件=2019-03-11库存将变为8件
这是数组

foreach ( $orderProducts as $order_product ) {
                    //This the quantity in order details.
                    $orderQuantity = $order_product->quantity;
    $currentInventors = Inventory::whereProductId( $order_product->product_id )->get()->sortBy( 'expire_date' );

    if ( $currentInventors != null ) {
        foreach ( $currentInventors as $currentInventory ) {
            $takeQuantity = $currentInventory->inventory - $orderQuantity; //10-15 = 5
            if ( $currentInventory->inventory >= $orderQuantity ) {
                Inventory::whereId( $currentInventory->id )->update( [ 'inventory' => $takeQuantity ] );
                break;
            } elseif ( $currentInventory->inventory < $orderQuantity ) {
                Inventory::whereId( $currentInventory->id )->update( [ 'inventory' => 0 ] );
                //$takeQuantity = $currentInventory->inventory - $orderQuantity; //10-15 = -5
                $newQuantity = $orderQuantity - $currentInventory->inventory; //15-10 = 5
                if ( $currentInventory->inventory >= $orderQuantity ) {
                    Inventory::whereId( $currentInventory->id )->update( [ 'inventory' => $newQuantity ] );
                    break;
                }
            }
        }
    }
}

这是我支持的解决方案。
我的错是我没有在循环中每次减少
$orderQuantity

$orderProducts = OrderDetail::whereOrderListsId( $deliveryList->order_lists_id )->get();

foreach ( $orderProducts as $order_product ) {
    //This the quantity in order details.
    $orderQuantity = $order_product->quantity;
    //Here we selected the oldest expire date of the same product in the inventory.
    $currentInventors = Inventory::whereProductId( $order_product->product_id )->get()->sortBy( 'expire_date' );
    if ( $currentInventors != null ) {
        foreach ( $currentInventors as $currentInventory ) {
            $takeQuantity = $currentInventory->inventory - $orderQuantity;
            if ( $currentInventory->inventory >= $orderQuantity ) {
                Inventory::whereId( $currentInventory->id )->update( [ 'inventory' => $takeQuantity ] );
                break;
            } else {
                $orderQuantity = $orderQuantity - $currentInventory->inventory;
                Inventory::whereId( $currentInventory->id )->update( [ 'inventory' => 0 ] );
            }
        }
    }
}

现在可以正常工作。
包括一个我们可以工作的阵列with@Andreas给你，我更新了我的问题。我们不能使用数组。很好。@Andreas更新了，如果你需要其他东西，请告诉我你希望我证明什么。“关于elseif，如果它是一种尝试[…]”-我的观点是，如果条件与前面的
if
完全相反，你不需要
elseif
，在这种情况下，一个简单的
else
在没有任何进一步条件的情况下也可以实现同样的效果。如果
$currentInventory->inventory>=$orderQuantity
不是这种情况，那么当前库存只能小于订购数量，没有其他第三种可能性…
$orderProducts = OrderDetail::whereOrderListsId( $deliveryList->order_lists_id )->get();

foreach ( $orderProducts as $order_product ) {
    //This the quantity in order details.
    $orderQuantity = $order_product->quantity;
    //Here we selected the oldest expire date of the same product in the inventory.
    $currentInventors = Inventory::whereProductId( $order_product->product_id )->get()->sortBy( 'expire_date' );
    if ( $currentInventors != null ) {
        foreach ( $currentInventors as $currentInventory ) {
            $takeQuantity = $currentInventory->inventory - $orderQuantity;
            if ( $currentInventory->inventory >= $orderQuantity ) {
                Inventory::whereId( $currentInventory->id )->update( [ 'inventory' => $takeQuantity ] );
                break;
            } else {
                $orderQuantity = $orderQuantity - $currentInventory->inventory;
                Inventory::whereId( $currentInventory->id )->update( [ 'inventory' => 0 ] );
            }
        }
    }
}