如何使用使用者的出生日期来计算使用者的平均年龄 [英] How to calculate the average age of users using their birth dates

问题描述

我想使用用户的出生日期来计算他们的平均年龄.我有一个名为 Member 的Model类，其中包括一个用于获取用户年龄的函数.

I want to calculate the average age of users using their birth dates. I have a Model class called Member, including a function to get the age of the user.

<?php
namespace App;

use Illuminate\Database\Eloquent\Model;
use Carbon\Carbon;

class Member extends Model {
    public static function averageAge() {
        //What to do here
    }

    public function age() {
        $birthDate = Carbon::parse($this->birthDate);
        return $birthDate->diffInYears(Carbon::now());
    }
}

推荐答案

Carbon 具有一种计算日期年龄"的方法，因此您可以在模型中执行此操作:

Carbon has a method to calculate the "age" of a date, so you can do this in your model instead:

class Member extends Model
{
    protected $casts = [
        'birthDate' => 'date',
    ];

    public function getAgeAttribute()
    {
         return $this->birthDate->age;
    }
}

如果您要计算多个成员的平均年龄，那么我将创建一个类，该类接受一组成员并返回该值:

If you’re wanting to calculate the average age of multiple members, then I’d create a class that takes a collection of members and returns that value:

class AverageAge
{
    public static function forMembers(Collection $members)
    {
        return $members->average(function ($member) {
            return $member->age;
        });
    }
}

然后您可以像这样使用:

Which you can then use like this:

$members = Member::where(...)->get();

$averageAge = AverageAge::forMembers($members);

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