将第一个模型的 id 传递给 Eloquent

Question

我想在子查询中传递 Products 的 id 时遇到问题。

第一个代码是我目前所拥有的。第二种是我想用 Eloquent 做的方式，但我做不到。

      $result = [];

    Product::with(['locals.presentations'])->each(function ($product) use (&$result) {

        $body['id'] = $product->id;
        $body['nombre'] = $product->nombre;
        $sedes = [];
        $product->locals->each(function ($local) use (&$sedes, $product) {
            $presentations = [];
            $local->presentations->each(function ($presentation) use (&$presentations, $local, $product) {

                if ($presentation->local_id == $local->id && $presentation->product_id == $product->id) {
                    $presentations[] = [
                        'local_id' => $presentation->local_id,
                        'product_id' => $presentation->product_id,
                        'presentacion' => $presentation->presentation,
                        'precio_default' => $presentation->price
                    ];
                }
            });

          ...
    });

    return $result;

我想用 Eloquent 将之前的代码转换成这个，但是我不能将 product_id 传递给子查询：

    $products = Product::with(['locals' => function ($locals) {
        //How to get the id from Product to pass in the $presentations query ??????
        $locals->select('locals.id', 'descripcion')
            ->with(['presentations' => function ($presentations) {
                $presentations
                // ->where('presentations.product_id', $product_id?????)
                ->select(
                    'presentations.local_id',
                    'presentations.product_id',
                    'presentations.id',
                    'presentation',
                    'price'
                );
            }]);
    }])->select('products.id', 'nombre')->get();

    return $products;

产品

    public function locals()
{

    return $this->belongsToMany(Local::class)->using(LocalProduct::class)
        ->withPivot(['id', 'is_active'])
        ->withTimestamps();

}

本地

    public function presentations()
{
    return $this->hasManyThrough(
        Presentation::class,
        LocalProduct::class,
        'local_id',
        'local_product_id'
    );
}

Answer 1

如果您在Product 和Local 模型上正确设置了关系，则可以简单地使用has() 方法。这将仅返回具有本地人和演示文稿的产品。

如果您想要所有产品，但只需要 product_id 等于 products.id 的本地人和演示文稿，那么您无需执行任何操作。您在模型中设置的关系已经检查了 id 是否匹配。

$products = Product::has('locals.presentations')
    ->with(['locals' => function ($locals) {
        $locals
            ->select('locals.id', 'descripcion')
            ->with(['presentations' => function ($presentations) {
                $presentations->select(
                    'presentations.local_id',
                    'presentations.product_id',
                    'presentations.id',
                    'presentation',
                    'price'
                );
           }]);
    }])->select('products.id', 'nombre')->get();