Laravel Dynamic Relationship Or Column

Model.php

<?php 

// create a dynamic relationship (when there isnt a column to relate to... make one dynamicly!)
public function scopeWithLastLogin($query)
{
    $query->addSelect(['last_login_id' => Login::select('id')
       ->whereColumn('user_id', 'users.id')
       ->latest()
       ->take(1)
    ])->with('lastLogin');
}

public function lastLogin()
{
    return $this->belongsTo(Login::class);
}

// OR add just a column

public function scopeWithProjectName($query)
{
    $query->addSelect(['project_name' => Project::select('name')
        ->whereColumn('id', 'project_id')
        ->latest()
        ->take(1)
    ]);
}