Question

您好我试图将同一类别中的所有产品传递给视图我的products表有cat_id，它与类别表中的cat_id有关，我将产品ID中的所有数据都收集到单个产品视图中，并且我也希望向该产品显示相关产品在这里我传递给产品页面的控制器

public function product($id){
        $product = Products::where('pro_id',$id)->Paginate(1);
        $products=Products::where('cat_id',$product->cat_id)->get();
        return view('front.product.product', compact('product','products'));
    }

$ product变量有效但不是$ products变量尝试使用$ products变量

时出现以下错误

Undefined property: Illuminate\Pagination\LengthAwarePaginator::$cat_id

和我尝试传递给视图时的变量

@foreach($product as $show)
<div class="col-md-9">
    <div class="col-md-5 grid">
        <div class="thumb-image"> <img src="{!! url('public/backend/images/products/'.$show->pro_img) !!}" data-imagezoom="true" class="img-responsive" style="width: 305px; height: 400px;"> </div>
    </div>
<div class="col-md-7 single-top-in">
                        <div class="single-para simpleCart_shelfItem">
                            <h1>{{$show->pro_title}}</h1>
                            <p>{{$show->pro_descript}}</p>

                                <label  class="add-to item_price">{{$show->pro_price}}</label>

                            <div class="available">
                                <h6>Description</h6>
                                <h4>{{$show->pro_detail}}</h4>
                        </div>
                                <a href="#" class="cart item_add">Add to cart</a>
                        </div>
                    </div>
            <div class="clearfix"> </div>
            <div class="content-top1">
            <div class="clearfix"> </div>
            </div>
            @foreach($products as $related)
                            <div class="col-md-4 col-md3">
                                <div class="col-md1 simpleCart_shelfItem">
                                    <a href="single.html">
                                        <img class="img-responsive" src="{!! url('public/backend/images/products/'.$related->pro_img) !!}" alt="" />
                                    </a>
                                    <h3><a href="single.html">{{$related->pro_detail}}</a></h3>
                                    <div class="price">
                                            <h5 class="item_price">{{$related->pro_price}}</h5>
                                            <a href="#" class="item_add">Add To Cart</a>
                                            <div class="clearfix"> </div>
                                    </div>
                                </div>
                            </div>
            @endforeach
</div>
@endforeach

当我dd（$ product）与paginate（1）

LengthAwarePaginator {#237 ▼
  #total: 1
  #lastPage: 1
  #items: Collection {#226 ▼
    #items: array:1 [▼
      0 => Products {#232 ▼
        #table: "tbl_products"
        #primaryKey: "pro_id"
        +timestamp: false
        #filltable: array:9 [▼
          0 => "cat_id"
          1 => "pro_title"
          2 => "pro_descript"
          3 => "pro_detail"
          4 => "pro_img"
          5 => "quantity"
          6 => "pro_date"
          7 => "pro_price"
          8 => "pro_status"
        ]
        #connection: "mysql"
        #keyType: "int"
        +incrementing: true
        #with: []
        #withCount: []
        #perPage: 15
        +exists: true
        +wasRecentlyCreated: false
        #attributes: array:12 [▼
          "pro_id" => 2
          "cat_id" => 9
          "pro_title" => "veston "
          "pro_descript" => "look good"
          "pro_detail" => "blue jean"
          "pro_img" => "1516593265.jpg"
          "quantity" => 8
          "pro_date" => "2018-01-22 10:54:25"
          "pro_price" => 400.0
          "pro_status" => 0
          "created_at" => "2018-01-22 03:54:25"
          "updated_at" => "2018-01-22 03:54:25"
        ]
        #original: array:12 [▼
          "pro_id" => 2
          "cat_id" => 9
          "pro_title" => "veston "
          "pro_descript" => "look good"
          "pro_detail" => "blue jean"
          "pro_img" => "1516593265.jpg"
          "quantity" => 8
          "pro_date" => "2018-01-22 10:54:25"
          "pro_price" => 400.0
          "pro_status" => 0
          "created_at" => "2018-01-22 03:54:25"
          "updated_at" => "2018-01-22 03:54:25"
        ]
        #changes: []
        #casts: []
        #dates: []
        #dateFormat: null
        #appends: []
        #dispatchesEvents: []
        #observables: []
        #relations: []
        #touches: []
        +timestamps: true
        #hidden: []
        #visible: []
        #fillable: []
        #guarded: array:1 [▼
          0 => "*"
        ]
      }
    ]
  }
  #perPage: 1
  #currentPage: 1
  #path: "http://localhost:81/shop/product/2"
  #query: []
  #fragment: null
  #pageName: "page"
}

Answer 1

$product = Products::where('pro_id',$id)->Paginate(1);

此代码返回数组 cahnge代码：

$product = Products::where('pro_id',$id)->first();

Answer 2

在这里你要打电话给一个分页器：

$product = Products::where('pro_id',$id)->Paginate(1);

请改为尝试：

$product = Products::where('pro_id',$id)->first();

-OR -

$product = Products::where('pro_id',$id)->paginate(1)[0];

- 或者最后 -

$product = Product::findOrFail($id);

后者只有在您的班级中设置protected $primaryKey = 'pro_id';时才有效。

细节：

当你在你的例子中调用$product = Products::where('pro_id',$id)->Paginate(1);' you are getting a Paginator instance back from the data layer. The Paginator doesn't have the properties that a Product`时，这就是错误发生的地方。

paginator是一种不同类型的集合，但它也是一种集合。可以把它想象成一个数组，或者像Java样式ArrayList，它是一个提供额外功能的数组的复杂包装类。分页器类似，但具有额外的抽象级别以提供基于视图的分页。您可以访问＆＃39;页面上的对象。在paginator中类似于如何获得对集合中对象的类似数组的访问。

如果您只是返回一个集合，那么

$product = Products::where('pro_id',$id)->get();

将匹配的ID作为集合提供给您。为了真正看到你想要的对象，你需要这样做：

$product = Products::where('pro_id',$id)->paginate(1)[0];

获取该集合中的第一项。

Laravel获得同类产品

2 个答案: