Multiple morphTo

Yes, you need MorphTo relationships for from and to and two columns each.

Schema::create('messages', function (Blueprint $table) {
    [...]
    $table->morphs('from');
    $table->morphs('to');
    [...]
});

class Message extends Model {
    public function from() {
        return $this->morphTo();
    }

    public function to() {
        return $this->morphTo();
    }
}

@staudenmeir I did this to, but the problme is how to associate Admin, User, Member models to it?

If I do Admin::first()->messageFromMe()->save($message) it will complain about field to beeing null!

Use associate():

$message = new Message([...]);
$message->from()->associate(Admin::find(1));
$message->to()->associate(User::find(2));
$message->save();

@staudenmeir But whenever I want to call Admin::first()->messagesFromMe() it returns null!!

How did you define the messagesFromMe relationship?

@staudenmeir

public function messagesFromMe()
    {
        return $this->morphMany(Message::class, 'from');
    }

    public function messagesToMe()
    {
        return $this->morphMany(Message::class, 'to');
    }

What's the result of dd(Admin::first()->messagesFromMe()->toSql());?

@staudenmeir How stupid I am!! I should use Admin::first()->messagesFromMe; not Admin::first()->messagesFromMe()!!

Thank you for your help!