refactor: 产品详细接口关联产品字段添加spu返回

app/admin/model/v1/ProductRelatedModel.php

@@ -11,6 +11,12 @@ use app\common\model\ProductRelatedBaseModel;
  */
 class ProductRelatedModel extends ProductRelatedBaseModel
 {
+    // 关联产品模型
+    public function product()
+    {
+        return $this->belongsTo(ProductModel::class, 'related_product_id', 'id');
+    }
+
     // 根据产品ID查询
     public function scopeProductId($query, $id)
     {