Get latest message (row) per user in Laravel

Question

TL;DR: Need latest message from each sender.

In my Laravel application I have two tables:

Users:

• id
• name

Messages:

Answer 1

This is the most "Eloquent way" I have found of doing this:

In User model:

public function messages() {
    return $this->hasMany(Message::class, 'recipient_id');
}

public function latestMessagePerSender()
{
    return $this->messages()
        ->whereNotExists(function ($query) {
            $query->from('messages AS m2')
                ->whereRaw('m2.sender_id = messages.sender_id')
                ->whereRaw('m2.created_at > messages.created_at');
    });
}

Then just $user->latestMessagePerSender