morphOne Last updated: 2022-10-01

There is no doubt that sometimes you need to use polymorphism
In your project and here we will explain how to bring one value through morphOne

Suppose a user can comment on some things using the Model name and user id

App\Models\User

Inside the comment table with morphs owner (owner_type) , (owner_id)

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Comment extends Model {
	use HasFactory;

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

And we needed in the user resource to retrieve his last comment

class User extends Authenticatable {
	public function latestcomment() {
		return $this->morphOne(Comment::class, 'owner')->orderBy('id', 'desc');
	}
}	

Note that we have prepared the method latestcomment

You will have to fetch the value inside the user resource this way

morphOne()->make('Latest Comment', 'latestcomment', Comments::class),

Label : Latest Comment 

method: latestcomment

reference resource is : App\Dash\Resources\Comment