Question

我有一张包含日期和评论的购买表，以及一张purchaseItail表，其中purchaseId作为购买表的外键。两个模型表中的关系是：

购买模式： -

use Illuminate\Database\Eloquent\Model;
class Purchase extends Model {
public function purchasedetails() {
    return $this->hasMany('App\Models\Purchasedetail', 'PurchaseId', 'Id');
}
  }

和 Purchasedetail型号： -

use Illuminate\Database\Eloquent\Model;
class Purchasedetail extends Model {
public function purchase() {
    return $this->belongsTo('App\Models\Purchase', 'PurchaseId', 'Id');
}
}

如何创建，更新和删除具有关系的表数据？我的主要问题是当我向控制器发送数据并尝试创建时，创建了主页数据，但它无法创建父表数据或更新它。我正在使用Laravel 5。

我的控制器的一些代码：

$purchase = new Purchase();
    $purchase->Date = Input::get('Date');
    $purchase->Comment = Input::get('Comment');
    $purchase->purchasedetails = Input::get('Purchasedetail');
$purchase-> save();

if (count($purchase->purchasedetails) != 0) {
foreach ($purchase->purchasedetails as $v) {
    $purchasedetail = new Purchasedetail();
    $purchasedetail->ItemId = $v->ItemId;
return $v->ItemId;
    }
}
$purchase-> Purchasedetail()->save($purchasedetail);

我得到了这个错误：

helpers.php第703行中的ErrorException：preg_replace（）：参数不匹配，pattern是一个字符串，而replacement是一个数组。那意味着$ purchase-＆gt; save（）是不可能的。在这里，我得到一个数组列表来自Input :: get（'Purchasedetail'）。

那我现在该怎么办？

Answer 1

尝试以下方法：

$purchase = new Purchase();
$purchase->Date = Input::get('Date');
$purchase->Comment = Input::get('Comment');

$purchase-> save();

$purchase->purchasedetails = Input::get('Purchasedetail');
foreach ($purchase->purchasedetails as $row) {
    $purchasedetail = new Purchasedetail();
    $purchasedetail->ItemId = $row['ItemId'];
    $purchasedetail->GradeId = $row['GradeId'];
    $purchasedetail->Quantity = $row['Quantity'];
    $purchase->purchasedetails()->save($purchasedetail);
}

Answer 2

我现在肯定，但你可以这样做。

 $purchase = new Purchase();
 ...
 $purchaseDetails = new PurchaseDetails();
 $purchaseDetails->purchaseId = $purchase->id;
 $purchaseDetails->save();

Laravel 5一对多关系主数据和父数据CRUD

2 个答案: