Laravel 8 根据条件 hasMany 求和数据

Question

我总是出错：

Property [payment] does not exist on this collection instance.

但我已经在 User 上设置了 eloquent :

public function payment() { return $this->hasMany(Payment::class); }

当我使用 where 和 whereBetween 时它不起作用。如果我这样做听起来不错:

User::first()->payment->sum('amount')

修补程序示例：

$l = User::whereBetween('created_at', ['2022-02-20', '2022-02-28'])->with('payment')->get()
$l->payment->sum('amount')

我只需要 1 行不在数组中的结果。因为我找到 table 页脚的总计。

Answer 1

您可以通过以下方式为关系添加条件

$users = User::whereBetween('created_at', [
         '2022-02-20', '2022-02-28'
     ])->with(['payments'])
     ->get();

当您获取多个用户时，您需要遍历循环。那就是您的代码中缺少的内容

$users = $users->map(function ($user) {
            $user['total_payment'] = $user->payments->sum('amount');
            return $user;
        });

然后

$grandTotal = $users->sum('total_payment');

Answer 2

试试这个

$l = User::whereBetween('created_at', ['2022-02-20', '2022-02-28'])->with('payment')->get();

$grandTotal = $l->map(function ($item) {
    $item->total_amount = $item->payment->sum('amount');
    return $item;
})->sum('total_amount');

Laravel 8 根据条件 hasMany 求和数据

Laravel 8 sum data on condition hasMany

laravel

eloquent

laravel-8