SQLSTATE [42S22]：未找到列：1054 '字段列表'中的未知列 'id'

Question

我有 product_variants 表，它与其他 2 个表数据 products 和 variants 相关联

当我尝试更新我的产品时，它会返回此错误

SQLSTATE[42S22]：未找到列：1054 '字段中的未知列 'id' list' (SQL: 更新product_variants 设置id = 0118d682-970f-4859-b30b-e1c79df9c342, parent_id = ?, name = 接口，slug = 接口，photo = ?，type = 文本区域， active = 是，created_at = 2020-08-05 14:57:42，updated_at = 2020-08-05 14:57:42，pivot = {"product_id":"4ea5f41f-aa2f-46d4-b033-e4e875cc8ff4","variant_id":"0118d682-970f-4859-b30b-e1c79df9c342"}, children = [{"id":"7efe338d-9026-4fe8-b16f-6b99bc51871a","parent_id":"0118d682-970f-4859-b30b-e1c79df9c342","name":"1x RJ45, 1x SD (XC/HC) 读卡器, 1x (4K @ 60Hz) HDMI, 1x Mini-DisplayPort, 2x Type-A USB3.2 Gen1, 1x Type-A USB3.2 Gen2, 1x Type-C (USB3.2 Gen2 / DP), 1x Type-C USB3.2 Gen2x2","slug":"1x RJ45, 1x SD (XC/HC) 读卡器、1x (4K @ 60Hz) HDMI、1x Mini-DisplayPort、 2x Type-A USB3.2 Gen1、1x Type-A USB3.2 Gen2、1x Type-C（USB3.2 Gen2 /DP), 1x Type-C USB3.2 Gen2x2","photo":null,"type":"textarea","active":"yes","created_at":"2020-08-05 14:57:42","updated_at":"2020-08-05 14:57:42"}] 其中product_id = 4ea5f41f-aa2f-46d4-b033-e4e875cc8ff4 和variant_id (0))

代码

product_variants迁移

public function up()
{
    Schema::create('product_variants', function (Blueprint $table) {
        $table->primary(['product_id', 'variant_id']);
        $table->uuid('product_id')->nullable();
        $table->foreign('product_id')->references('id')->on('products')->onDelete('cascade');
        $table->uuid('variant_id')->nullable();
        $table->foreign('variant_id')->references('id')->on('variants');
    });
}

product model

public function variations(){
    return $this->belongsToMany(Variant::class, 'product_variants', 'product_id', 'variant_id');
}

variant model

public function products(){
    return $this->belongsToMany(Product::class, 'product_variants', 'variant_id', 'product_id');
}

知道导致问题的原因吗？

Answer 1

我建议自己制作Pivot Model并坦率地设置主键：

use Illuminate\Database\Eloquent\Relations\Pivot;

class ProductVariants extends Pivot
{
   protected $primaryKey = ['product_id', 'variant_id'];
public $incrementing = false;
}

在此之后你应该修改你的关系：

public function variations()
    {
        return $this->belongsToMany(Variant::class)
                        ->using(ProductVariants::class);
    }