Php 拉威尔雄辩地收集成对的物品

我正在寻找一种方法来聚合Laravel中的

雄辩的

用户对集合<代码>[[用户][合作伙伴]]

我有下面的users表结构

[id] [name] [partner_id]

用户实体具有匹配的合作伙伴ID或null（如果不存在合作伙伴）

预期结果：

[
  [
    { "id": 1, "name": "John Doe", "partner_id": 3 },
    { "id": 3, "name": "Jane Doe", "partner_id": 1 },
  ],
  [
    { "id": 2, "name": "J Random User", "partner_id": null },
  ]
]

我不知道如何在控制器中一次性获取用户并将

$users

-集合聚合成成对

<?php

namespace App\Http\Controllers;

use App\User;

class PairController extends Controller
{
    public function index()
    {
        $users = User::all();
        $collection = collect();

        foreach ($users as $user) {
            $myself = $user->id;
            $partner = $user->partner_id;

            // ... ???
        }

        return $collection->unique();
    }
}

---

试试这个，它并不完美，但可能是一个开始

// Return all users and group them by their id
$grouped_users = User::all()->groupBy('id');

// Now loop through each user on record
User::all()->each(function ($user) use (&$grouped_users) {
    if ($user->partner_id && $grouped_users->has($user->partner_id)) {
        $partner_id = $user->partner_id;

        // Push the user model into our grouped collection
        $grouped_users[$partner_id]->push($user);

        // Remove the id for the current user from the collection
        $grouped_users->forget($user->id);
    }
});

请尝试下面的代码

    public function index()
    {
        $usersWithoutPartner = collect();
        $usersWithPartner = collect();
        User::chunk(100, function ($users) use ($usersWithoutPartner, $usersWithPartner) {
            foreach ($users as $user) {
                if ($user->partner_id == null) {
                    $usersWithoutPartner->push($user);
                } else {
                    $usersWithPartner->push($user);
                }
            }
        });

        $finalCollection = collect();
        $finalCollection->push($usersWithoutPartner);
        $finalCollection->push($usersWithPartner);
        return $finalCollection;
}

分块是个好主意！可能需要使用
和
将您的收藏包括在内，以便将它们写入
    public function index()
    {
        $usersWithoutPartner = collect();
        $usersWithPartner = collect();
        User::chunk(100, function ($users) use ($usersWithoutPartner, $usersWithPartner) {
            foreach ($users as $user) {
                if ($user->partner_id == null) {
                    $usersWithoutPartner->push($user);
                } else {
                    $usersWithPartner->push($user);
                }
            }
        });

        $finalCollection = collect();
        $finalCollection->push($usersWithoutPartner);
        $finalCollection->push($usersWithPartner);
        return $finalCollection;
}