Laravel Lumen Collection - 按总和分组并保留值答案

【问题标题】：Laravel Lumen Collection - Group By With Sum and preserve the valuesLaravel Lumen Collection - 按总和分组并保留值
【发布时间】：2021-11-17 18:31:01
【问题描述】：

我正在研究 Lumen，我的收藏有重复的值，例如：

collect([
 [
        'name' => 'John Doe',
        'department' => 'Sales',
        'phone' => '99999-99999',
        'value' => 25.0
    ],
    [
        'name' => 'Mary Lisa',
        'department' => 'Finance',
        'phone' => '88888-88888',
        'value' => 5.0
    ],
    [
        'name' => 'Mary Lisa',
        'department' => 'Finance',
        'phone' => '88888-88888',
        'value' => 58.0
    ],
    [
        'name' => 'Lucas Rodrigues',
        'department' => 'Marketing',
        'phone' => '22222-22222',
        'value' => 90.0
    ]
])

当名称相同但保留其他值（例如（部门和电话））并删除重复实体时，我想对 value 属性求和，例如：

collect([
 [
        'name' => 'John Doe',
        'department' => 'Sales',
        'phone' => '99999-99999',
        'value' => 25.0
    ],
    [
        'name' => 'Mary Lisa',
        'department' => 'Finance',
        'phone' => '88888-88888',
        'value' => 63.0
    ],
    [
        'name' => 'Lucas Rodrigues',
        'department' => 'Marketing',
        'phone' => '22222-22222',
        'value' => 90.0
    ]
])

最好的方法是什么？

【问题讨论】：

标签： php laravel lumen

【解决方案1】：

这可以使用集合函数 (https://laravel.com/docs/8.x/collections) 来实现。在这个例子中，我使用（groupBy、map、flatten、slice、count 和 sum）解决了这个问题。

$data = collect([
    [
        'name' => 'John Doe',
        'department' => 'Sales',
        'phone' => '99999-99999',
        'value' => 25.0
    ],
    [
        'name' => 'Mary Lisa',
        'department' => 'Finance',
        'phone' => '88888-88888',
        'value' => 5.0
    ],
    [
        'name' => 'Mary Lisa',
        'department' => 'Finance',
        'phone' => '88888-88888',
        'value' => 58.0
    ],
    [
        'name' => 'Lucas Rodrigues',
        'department' => 'Marketing',
        'phone' => '22222-22222',
        'value' => 90.0
    ]
]);

$data = $data->groupBy('name')->map(function ($item) {
    if ($item->count() > 1) {
        $item = $item->slice(0, 1)->map(function($subItem) use ($item) {
            $subItem['value'] = $item->sum('value');

            return $subItem;
        });
    }

    return $item;
})
->flatten(1);

当调用print_r($data->toArray()); 时，我们得到以下数组作为结果：

Array
(
    [0] => Array
        (
            [name] => John Doe
            [department] => Sales
            [phone] => 99999-99999
            [value] => 25
        )

    [1] => Array
        (
            [name] => Mary Lisa
            [department] => Finance
            [phone] => 88888-88888
            [value] => 63
        )

    [2] => Array
        (
            [name] => Lucas Rodrigues
            [department] => Marketing
            [phone] => 22222-22222
            [value] => 90
        )

)

【讨论】：

不错！谢谢;)

【解决方案2】：

尝试以下方法：

$newCollection = collect([]);
$collectctions = collect([
    [
        'name' => 'John Doe',
        'department' => 'Sales',
        'phone' => '99999-99999',
        'value' => 25.0
    ],
    [
        'name' => 'Mary Lisa',
        'department' => 'Finance',
        'phone' => '88888-88888',
        'value' => 5.0
    ],
    [
        'name' => 'Mary Lisa',
        'department' => 'Finance',
        'phone' => '88888-88888',
        'value' => 58.0
    ],
    [
        'name' => 'Lucas Rodrigues',
        'department' => 'Marketing',
        'phone' => '22222-22222',
        'value' => 90.0
    ]
]);

foreach ($collectctions as $item) {
    if($newCollection->contains('name', $item['name'])){
        $index = $newCollection->where('name', $item['name'])->keys()[0];

        $newCollection = $newCollection->map(function ($object, $i) use ($index, $item) {
            if($i == $index){
                $object['value'] += $item['value'];
            }

            return $object;
        });

    }
    else{
        $newCollection->push($item);
    }
}

return $newCollection;

【讨论】：