Laravel从belongsToMany关系中获取数据

Question

在我的网站上我有Products和ProductCategories他们belongsToMany的关系，

控制器：

$products = Products::paginate(10);

查看：

@foreach($products as $product)
    {{$product->productCategories}}
@endforeach

我有这个结果：

[{"id":6,"category_name":"\u062f\u0645 \u0646\u0648\u0634 \u0647\u0627","lang":"fa",
  "images":{"images":{"original":"\/uploads\/post_images\/2017\/1513065012.jpeg"},
  "created_at":"2017-12-12 07:50:12",
  "updated_at":"2017-12-12 07:50:12","pivot":{"products_id":44,"product_categories_id":6}}]

现在我如何在此结果中访问category_name？

此代码对我不起作用，我收到错误：

{{$product->productCategories->category_name}}

错误：

Property [category_name] does not exist on this collection instance.

或

{{$product->productCategories['category_name']}}

错误：

Undefined index: category_name

Answer 1

你需要迭代收集：

@foreach($products as $product)
    @foreach($product->productCategories as $category)
        {{ $category->category_name }}
    @endforeach
@endforeach