英文:
handle n+1 with hasManyThrough relation
问题
我的产品有一个名为“values”的关系，如下所示：
public function values()
{
return $this->hasManyThrough(VariantValue::class, VariantProductOption::class, 'product_id', 'product_option_id');
}
一切都正常，但当我在单个页面上有多个产品时，会出现N+1问题：
select `variant_sku_values`.*, `variant_sku_product_options`.`product_id` as `laravel_through_key` from `variant_sku_values` inner join `variant_sku_product_options` on `variant_sku_product_options`.`id` = `variant_sku_values`.`product_option_id` where `variant_sku_product_options`.`product_id` = 61520 and `option_id` = 1
1.16ms
-----------------------------------------
arya-lion
select `variant_sku_values`.*, `variant_sku_product_options`.`product_id` as `laravel_through_key` from `variant_sku_values` inner join `variant_sku_product_options` on `variant_sku_product_options`.`id` = `variant_sku_values`.`product_option_id` where `variant_sku_product_options`.`product_id` = 81066 and `option_id` = 1
1.09ms
-----------------------------------------
arya-lion
select `variant_sku_values`.*, `variant_sku_product_options`.`product_id` as `laravel_through_key` from `variant_sku_values` inner join `variant_sku_product_options` on `variant_sku_product_options`.`id` = `variant_sku_values`.`product_option_id` where `variant_sku_product_options`.`product_id` = 81069 and `option_id` = 1
1.07ms
------------------------------------------
arya-lion
select `variant_sku_values`.*, `variant_sku_product_options`.`product_id` as `laravel_through_key` from `variant_sku_values` inner join `variant_sku_product_options` on `variant_sku_product_options`.`id` = `variant_sku_values`.`product_option_id` where `variant_sku_product_options`.`product_id` = 93662 and `option_id` = 1
1ms
-----------------------------------------
arya-lion
select `variant_sku_values`.*, `variant_sku_product_options`.`product_id` as `laravel_through_key` from `variant_sku_values` inner join `variant_sku_product_options` on `variant_sku_product_options`.`id` = `variant_sku_values`.`product_option_id` where `variant_sku_product_options`.`product_id` = 93724 and `option_id` = 1
我尝试预加载“values”关系，但这并不起作用。
英文:
my product has relation called values which is like this:
public function values()
{
return $this->hasManyThrough(VariantValue::class, VariantProductOption::class, 'product_id', 'product_option_id');
}
everything works fine but when i have a multiple products in a single pages n+1 problem happens:
select `variant_sku_values`.*, `variant_sku_product_options`.`product_id` as `laravel_through_key` from `variant_sku_values` inner join `variant_sku_product_options` on `variant_sku_product_options`.`id` = `variant_sku_values`.`product_option_id` where `variant_sku_product_options`.`product_id` = 61520 and `option_id` = 1
1.16ms
-----------------------------------------
arya-lion
select `variant_sku_values`.*, `variant_sku_product_options`.`product_id` as `laravel_through_key` from `variant_sku_values` inner join `variant_sku_product_options` on `variant_sku_product_options`.`id` = `variant_sku_values`.`product_option_id` where `variant_sku_product_options`.`product_id` = 81066 and `option_id` = 1
1.09ms
-----------------------------------------
arya-lion
select `variant_sku_values`.*, `variant_sku_product_options`.`product_id` as `laravel_through_key` from `variant_sku_values` inner join `variant_sku_product_options` on `variant_sku_product_options`.`id` = `variant_sku_values`.`product_option_id` where `variant_sku_product_options`.`product_id` = 81069 and `option_id` = 1
1.07ms
------------------------------------------
arya-lion
select `variant_sku_values`.*, `variant_sku_product_options`.`product_id` as `laravel_through_key` from `variant_sku_values` inner join `variant_sku_product_options` on `variant_sku_product_options`.`id` = `variant_sku_values`.`product_option_id` where `variant_sku_product_options`.`product_id` = 93662 and `option_id` = 1
1ms
-----------------------------------------
arya-lion
select `variant_sku_values`.*, `variant_sku_product_options`.`product_id` as `laravel_through_key` from `variant_sku_values` inner join `variant_sku_product_options` on `variant_sku_product_options`.`id` = `variant_sku_values`.`product_option_id` where `variant_sku_product_options`.`product_id` = 93724 and `option_id` = 1
i tried to eager load the values relation but this doesnt work.
答案1
得分: 1
通过 @Coola 的帮助，我以如下方式使用贪婪加载关系找到了解决方案：
Product::query()->with([
'values' => ['value' => ['option']],
])
英文:
with help of @Coola i somehow find the solution by eagerloading the relation
like below:
Product::query()->with([
'values' => ['value' => ['option']],
])
</details>
# 答案2
**得分**: 0
你可以像这样使用 eager loading 的 `with` 方法：
```php
public function values()
{
return $this->hasManyThrough(VariantValue::class, VariantProductOption::class, 'product_id', 'product_option_id')
->with('variantProductOption');
}
英文:
You can use with for eager loading like this-
public function values()
{
return $this->hasManyThrough(VariantValue::class, VariantProductOption::class, 'product_id', 'product_option_id')
->with('variantProductOption');
}
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