Laravel 多个排序方式无法正常工作

Question

我对 laravel sortBy ( laravel 5.4 ) 有一些问题..根据我在许多网站上阅读的内容，它说进行多个 sortBy laravel 是通过使用反向订单..所以我尝试这样做..但仍然无法正常工作..

所以在这里.. 我有这个对象集合...

[{
   'product_id' => 468,
   'name' => 'abc',
   'int_premi' => 10000
   'score' => 1000
   'rates' => 0,
   'views' => 0,
   'promo' => null
},{
   'product_id' => 472,
   'name' => 'bcd',
   'int_premi' => 10000
   'score' => 1000
   'rates' => 0,
   'views' => 0,
   'promo' => 'Some text here'
},{
   'product_id' => 458,
   'name' => 'def',
   'int_premi' => 10000
   'score' => 1000
   'rates' => 0,
   'views' => 0,
   'promo' => 'ABC'
}]

我的目标是按照此顺序对这些对象进行排序

score ( asc ) > int_premi ( asc ) > rates ( desc ) > promo ( as boolean ) ( desc ) > views ( desc ) > product_id ( desc )

所以我写了这段代码..

$collection->sortByDesc('product_id')->sortByDesc('views')->sortByDesc(function($arr,$k){
                            return !empty($arr->promo);
    })->sortByDesc('rates')->sortBy('int_premi')->sortBy('score')->values()->all()

我正在寻找此订单附带的结果

BCD > DEF > ABC

相反，不遵循该顺序..

请问有没有人遇到和我一样的问题？也许有人可以帮助我解决这个问题？

非常感谢

Answer 1

根据您的需要，这段代码工作得很好。但是如果你想修改什么，你可以评论：

$collection = ([[
   'product_id' => 468,
   'name' => 'abc',
   'int_premi' => 10000,
   'score' => 1000,
   'rates' => 0,
   'views' => 0,
   'promo' => null
],[
   'product_id' => 472,
   'name' => 'bcd',
   'int_premi' => 10000,
   'score' => 1000,
   'rates' => 0,
   'views' => 0,
   'promo' => 'Some text here'
],[
   'product_id' => 458,
   'name' => 'def',
   'int_premi' => 10000,
   'score' => 1000,
   'rates' => 0,
   'views' => 0,
   'promo' => 'ABC'
]]);

$collection = collect($collection)->sortByDesc('product_id')->sortByDesc('views')->sortByDesc('promo')->sortByDesc('rates')->sortBy('int_premi')->sortBy('score')->values()->all();
return $collection;

Answer 2

经过一些研究..我发现它正在工作.. 如果你也遇到同样的事情..这篇文章可能会有所帮助..

https://www.jjanusch.com/2017/05/laravel-collection-macros-adding-a-sortbymuti-function

所以我的决赛与这篇文章的建议完全相同，通过创建一个宏..像这样

if (!Collection::hasMacro('sortByMulti')) {
    /**
     * An extension of the {@see Collection::sortBy()} method that allows for sorting against as many different
     * keys. Uses a combination of {@see Collection::sortBy()} and {@see Collection::groupBy()} to achieve this.
     *
     * @param array $keys An associative array that uses the key to sort by (which accepts dot separated values,
     *                    as {@see Collection::sortBy()} would) and the value is the order (either ASC or DESC)
     */
    Collection::macro('sortByMulti', function (array $keys) {
        $currentIndex = 0;
        $keys = array_map(function ($key, $sort) {
            return ['key' => $key, 'sort' => $sort];
        }, array_keys($keys), $keys);

        $sortBy = function (Collection $collection) use (&$currentIndex, $keys, &$sortBy) {
            if ($currentIndex >= count($keys)) {
                return $collection;
            }

            $key = $keys[$currentIndex]['key'];
            $sort = $keys[$currentIndex]['sort'];
            $sortFunc = $sort === 'DESC' ? 'sortByDesc' : 'sortBy';
            $currentIndex++;
            return $collection->$sortFunc($key)->groupBy($key)->map($sortBy)->ungroup();
        };

        return $sortBy($this);
    });
}

然后你就可以像这样在你的 collection 上使用它

$collection->sortByMulti([
    'prop_one'       => 'ASC',
    'prop_two'        => 'ASC',
    etc....
]);

prop_one 和 prop_two 是您的 collection 属性.. 希望这有帮助

Laravel 多个排序方式无法正常工作

Laravel Multiple Sortby Not Working Properly

php

laravel

laravel-5

laravel-collection