如何在 Laravel 中订购从高到低、从低到高的产品 - 使用此代码按价格？答案

【问题标题】：How to order in Laravel high to low , low to high products - by price with this code?如何在 Laravel 中订购从高到低、从低到高的产品 - 使用此代码按价格？
【发布时间】：2017-09-19 17:57:58
【问题描述】：

如何在 Laravel 中订购从高到低、从低到高的产品 - 使用此代码按价格？我得到了默认演示文稿的全部内容，但我想添加 2 个链接来制作查询字符串，因此只有当我单击它们时，产品才会按从高到低或从低到高的顺序排序 - 否则，当它没有点击任何链接时默认排序 - DESC 或 ASC 这是按顺序排列的代码：模型控制器 HTML：

static public function getProducts($url_category, &$data) {

    $data['products'] = [];

    if ($category = Categorie::where('url', '=', $url_category)->first()) {

        $category = $category->toArray();
        $data['title'] = $data['title'] . $category['title'];
        $data['url_category'] = $url_category;

        if ($products = Categorie::find($category['id'])->products) {

            $data['products'] = $products->toArray();
        }
    }
}





function __construct() {
    parent::__construct();
    $this->middleware('adminAuth');
}

public function index() {
    self::$data['products'] = Product::all()->toArray();
    return view('cms.products', self::$data);
}

public function create() {
    self::$data['categories'] = Categorie::all()->toArray();
    return view('cms.add_product', self::$data);
}

public function store(ProductRequest $request) {
    Product::save_new($request);
    return redirect('cms/products');
}

public function show($id) {
    self::$data['product_id'] = $id;
    return view('cms.delete_product', self::$data);
}

public function edit($id) {
    self::$data['categories'] = Categorie::all()->toArray();
    self::$data['product'] = Product::find($id)->toArray();
    return view('cms.edit_product', self::$data);
}

public function update(ProductRequest $request, $id) {
    Product::update_product($request, $id);
    return redirect('cms/products');
}

public function destroy($id) {
    Product::destroy($id);
    Session::flash('sm', $request['title'] . ' has been deleted');
    return redirect('cms/products');
}





@if($products)

<a href='{{url('shop/' . $url_category . '?order=high')}}' class='btn btn-link'>From High to Low</a>|
<a href='{{url('shop/' . $url_category . '?order=low')}}' class='btn btn-link' style='color:purple;'>From Low to High</a>

<div class="row">
    @foreach($products as $row)
    <div class="col-md-6 col-sm-6">
        <h3>{{ $row['title'] }}</h3>
        <p><a href="{{url('shop/'. $url_category . '/' . $row['url'])}}"><img alt="{{ $row['title'] }}" border="0" width="200" height="200" src="{{ asset('images/' . $row['image']) }}"></a></p>
        <p>{!! $row['article'] !!}</p>
        <p><strong>Price on site: </strong>{{ $row['price'] }}$</p>
        <p>
            <a href="{{url('shop/'. $url_category . '/' . $row['url'])}}" class="btn btn-warning">View Product Details</a>
            <input @if( Cart::get($row['id'] )) disabled="disabled" @endif data-id="{{ $row['id'] }}" type="button" class="add-to-cart-btn btn btn-success" value="+ Add To Cart"/>
        </p>
    </div>
    @endforeach
</div>
@else 
<div class="row">
    <div class="col-md-12">
        <p><ans>No Products For This Category...</ans></p>
    </div>
</div>
@endif

【问题讨论】：

标签： php laravel laravel-5 blade

【解决方案1】：

您可以在控制器中使用 usort() 函数：

$data['products'] = $products->toArray();
if (request()->has('order') {
    usort($data['products'], function($a, $b) {
        return (request('order') == 'high') ? $b['price'] - 
$a['price'] : $a['price'] - $b['price'];
    });
}

【讨论】：

【解决方案2】：

您可能要考虑不将$products 转换为数组，而是将其保留为集合。这样你就可以使用 Laravel 的 sortBy() 方法以清晰的方式对集合进行排序。

// $order can be 'asc' or 'desc', which you determine in your controller
@foreach ($products->sortBy('column', $order) as $row)

在此处查看文档：Collections / sortBy()

【讨论】：