An Example class to Eager load Tables and Pivot Data

User.php

<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Alumni extends Model
{
    //
    protected $fillable = ['birthdate', 'firstname', 'lastname', 'country', 'teaser', 'fulltext', 'img'];
    protected $with = ['companies', 'products', 'social_platforms', 'campuses', 'departments'];
    public static function validationRules(): array
    {
        return [
            'alumni.firstname' => 'required',
            'alumni.lastname' => 'required',
            'product.course_code' => 'required',
            'product.achieved_at' => 'required',
            'alumni.birthdate' => 'required|date',
            'alumni.country' => 'required',
            'product.department_id' => 'required',
            'product.product_id' => 'required',
            'product.campus_id' => 'required',
        ];
    }
    public function getExpirationAttribute($value)
    {
        $current_date = date('d.m.Y');
        $enddate = strtotime($value);
        $diff = $enddate - time();
        $days = floor($diff/(60*60*24));
        $hours = round(($diff-$days*60*60*24)/(60*60));
        return [
            'timestamp' => strtotime($value),
            'dateTime_string' => $value,
            'days' => $days,
            'hours' => $hours,
        ];
    }
    public function companies()
    {
        return $this->belongsToMany(Company::class)->withPivot('current', 'position', 'employment_started', 'employment_ended');
    }
    public function products()
    {
        return $this->belongsToMany(Product::class)->withPivot(['course_code', 'achieved_at']);
    }
    public function social_platforms()
    {
        return $this->belongsToMany(SocialPlatform::class);
    }
    public function departments()
    {
        return $this->belongsToMany(Department::class, 'alumni_product', 'alumni_id', 'department_id');
    }
    public function campuses()
    {
        return $this->belongsToMany(Campus::class, 'alumni_product', 'alumni_id', 'campus_id');
    }
    public function user()
    {
        return $this->belongsTo(User::class);
    }
}