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php - Laravel：此集合实例上不存在属性 [名称]

问题描述

我正在尝试使用 Laravel 的资源集合转换所有产品的 json 数据。但它正在抛出错误。

“此集合实例上不存在属性 [名称]”。

我检查了官方文档，他们以类似的方式实现了它。

产品控制器.php

public function index()
    {
        return new ProductCollection(Product::all());
    }

ProductCollection.php

namespace App\Http\Resources\Product;

use Illuminate\Http\Resources\Json\ResourceCollection;

class ProductCollection extends ResourceCollection
{
    /**
     * Transform the resource collection into an array.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return array
     */
    public function toArray($request)
    {
        return [
            'name' => $this->name,
            'price' => $this->price
        ];
    }
}

产品资源.php

namespace App\Http\Resources\Product;

use Illuminate\Http\Resources\Json\JsonResource;

class ProductResource extends JsonResource
{
    /**
     * Transform the resource into an array.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return array
     */
    public function toArray($request)
    {
        return [
            'name' => $this->name,
            'description' => $this->detail,
            'price' => $this->price,
            'stock' => $this->stock,
            'discount' => $this->discount,
            'effectivePrice' => round($this->price * (1 - ($this->discount/100)), 2),
            'rating' => $this->reviews->count() > 0 ? round($this->reviews->sum('star') / $this->reviews->count(), 2) : 'No Ratigs Yet',
            'href' => [
                'reviews' => route('reviews.index', $this->id)
            ]
        ];
    }
}

注意：不转换 ProductCollection 时工作正常，即 ProductCollection 的toArray()函数如下所示：

public function toArray($request)
    {
        return parent::toArray($request);
    }

标签： phplaravel

解决方案

ProductCollection用于集合Products。
所以你需要使用foreach。

class ProductCollection extends ResourceCollection
{
    /**
     * Transform the resource collection into an array.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return array
     */
    public function toArray($request)
    {

        // final array to be return.
        $products = [];

        foreach($this->collection as $product) {

             array_push($products, [
                 'name' => $product->name,
                 'price' => $product->price
             ]);

        }

        return $products;
    }
}

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