【发布时间】:2017-09-08 09:09:52
【问题描述】:
我正在尝试更新具有由 customer_id 链接到客户表的外键约束的 orders 表。
迁移文件(100% 有效):
Schema::create('orders', function (Blueprint $table) {
$table->integer('order_id')->unsigned()->index();
$table->integer('customer_id')->unsigned()->index();
$table->foreign('customer_id')->references('customer_id')->on('customers')->onDelete('cascade');
$table->string('order_status');
$table->string('customer_note')->nullable();
$table->timestamp('order_date');
$table->timestamps();
$table->softDeletes();
$table->primary(['order_id', 'customer_id']);
});
在我的模型中,我使以下列为可填充的,这样 Laravel 就不会忽略它们:
protected $fillable = [
'order_id', 'customer_id', 'order_status', 'customer_note', 'order_date',
];
当我创建/更新订单时,我在更新方法下的 OrderController 中使用以下代码行。我使用 firstOrCreate() 来确保如果订单以某种方式被删除或从未添加过,这不会失败。
$order = Order::firstOrCreate(['order_id' => $request->input('id')]);
$order->order_id = $request->input('id');
$order->customer_id = $request->input('customer_id');
$order->order_status = $request->input('status');
$order->customer_note = $request->input('customer_note');
$order->order_date = $request->input('date_created');
$order->save();
当我尝试更新订单时,我在日志文件中收到以下错误消息:
Next Illuminate\Database\QueryException: SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (`vcc-backoffice`.`orders`, CONSTRAINT `orders_customer_id_foreign` FOREIGN KEY (`customer_id`) REFERENCES `customers` (`customer_id`) ON DELETE CASCADE) (SQL: insert into `orders` (`order_id`, `updated_at`, `created_at`) values (76, 2017-09-08 08:55:37, 2017-09-08 08:55:37)) in /home/vagrant/Projects/vcc-backoffice/vendor/laravel/framework/src/Illuminate/Database/Connection.php:647
我注意到插入语句只尝试插入 3 列。 order_id、updated_at、created_at
我假设无法创建该行,因为没有填充外部 *customer_id** 列,但我无法弄清楚 Laravel 忽略它们的原因。
我想也许输入格式不正确,但即使将 customer_id 硬编码为 1 也不起作用。 (customer_id 1 存在于客户表中)。
我还检查并确认 $request->input('customer_id') 包含正确的整数,在本例中为 1,并且确实作为记录存在客户表。
我怀疑 Laravel 忽略了相关列,但我无法弄清楚原因。
我的模型文件如下所示:
namespace App;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Notifications\Notifiable;
use Illuminate\Database\Eloquent\SoftDeletes;
class Order extends Model
{
use Notifiable;
use SoftDeletes;
/**
* The attributes that are mass assignable.
*
* @var array
*/
protected $fillable = [
'order_id', 'customer_id', 'order_status', 'customer_note', 'order_date',
];
/**
* Whether the primary key auto-increments.
*
* @var bool
*/
public $incrementing = false;
/**
* Set the primary key.
*
* @var string
*/
protected $primaryKey = ['order_id', 'customer_id'];
protected $with = ['products'];
/**
* The products that belong to the Order.
*/
public function products()
{
return $this->belongsToMany('App\Product','order_product','order_id','product_id')
->withPivot('qty')
->withTimeStamps();
}
/**
* The customer that belongs to the Order.
*/
public function customer()
{
return $this->belongsTo('App\Customer');
}
}
【问题讨论】:
-
添加外键时,相关表中必须存在记录。请检查一下
-
protected $primaryKey = ['order_id', 'customer_id'];是干什么用的? -
@SagarGautam 请在回答之前仔细阅读我的问题。我已经解释了一切
-
@MarcusChristiansen 我已经阅读了整个问题,我只想说重新检查一下
-
@SagarGautam 是的,就像我说的,客户存在于表中。
标签: php mysql laravel eloquent