Laravel 8 sortBy() {#collection-method}

2021-07-19 09:47 更新

sortBy 方法將根據(jù)指定鍵對集合進(jìn)行排序。排序后的集合會保留原始數(shù)組的鍵，所以在這個(gè)例子中我們使用 values 方法將鍵重置為連續(xù)編號的索引：

$collection = collect([
    ['name' => 'Desk', 'price' => 200],
    ['name' => 'Chair', 'price' => 100],
    ['name' => 'Bookcase', 'price' => 150],
]);

$sorted = $collection->sortBy('price');

$sorted->values()->all();

/*
    [
        ['name' => 'Chair', 'price' => 100],
        ['name' => 'Bookcase', 'price' => 150],
        ['name' => 'Desk', 'price' => 200],
    ]
*/

此方法接受排序標(biāo)志作為其第二個(gè)參數(shù)：

$collection = collect([
    ['title' => 'Item 1'],
    ['title' => 'Item 12'],
    ['title' => 'Item 3'],
]);

$sorted = $collection->sortBy('title', SORT_NATURAL);

$sorted->values()->all();

/*
    [
        ['title' => 'Item 1'],
        ['title' => 'Item 3'],
        ['title' => 'Item 12'],
    ]
*/

或者，你可以通過你自己的回調(diào)來決定如何排序集合的值:

$collection = collect([
    ['name' => 'Desk', 'colors' => ['Black', 'Mahogany']],
    ['name' => 'Chair', 'colors' => ['Black']],
    ['name' => 'Bookcase', 'colors' => ['Red', 'Beige', 'Brown']],
]);

$sorted = $collection->sortBy(function ($product, $key) {
    return count($product['colors']);
});

$sorted->values()->all();

/*
    [
        ['name' => 'Chair', 'colors' => ['Black']],
        ['name' => 'Desk', 'colors' => ['Black', 'Mahogany']],
        ['name' => 'Bookcase', 'colors' => ['Red', 'Beige', 'Brown']],
    ]
*/


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