我有以下具有多对多关系的雄辩模型:
class User extends Model
{
public function products()
{
return $this->belongsToMany(Product::class)
->using('App\UserProductPivot')
->withPivot('label', 'is_primary', 'sort_order')
}
}
class Product extends Model
{
public $incrementing = false;
protected $casts = [
'id' => "string"
];
}
并且如用户的产品关系所示,我正在使用自定义的中间表模型'App \ UserProductPivot':
<?php namespace App;
use Illuminate\Database\Eloquent\Relations\Pivot;
class UserStationPivot extends Pivot {
protected $casts = ['product_id' => 'string'];
}
数据透视表迁移:
Schema::create('station_user', function (Blueprint $table) {
$table->integer('user_id');
$table->string('product_id');
$table->boolean('is_primary')->nullable();
$table->string('label')->nullable();
$table->integer('sort_order');
$table->primary(['user_id', 'product_id']);
$table->timestamps();
});
问题
用户模型方法内:
$array = [23456 => [
"is_primary" => true
"label" => "Test"
"sort_order" => 1
],
"138seq" => [
"is_primary" => false
"label" => "Test"
"sort_order" => 2
]];
$this->products()->sync($array);
在给定的设置下,我希望将'product_id'23456强制转换为字符串,但是在调用sync()时,由于未将其强制转换为字符串,因此会在product_id字段上导致SQL错误。这是怎么回事?