laravel model amb relacio belongsTo un a un

 //laravel model amb relacio
//1.php artisan make:model Post
//2.php artisan make:model Post

//1.Post.php

<?php
namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Spatie\Tags\HasTags;
use Spatie\MediaLibrary\HasMedia;
use Spatie\MediaLibrary\InteractsWithMedia;


class Post extends Model implements HasMedia
{
    use HasTags;
	use InteractsWithMedia;

    protected $fillable = ['title', 'excerpt', 'content', 'img', 'url', 'youtube', 'category_id' ];

    
	// Relación con el categories
	public function category()
    {
        return $this->belongsTo(Category::class);
    }
}

//2.Category

<?php

namespace App\Models;

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

class Category extends Model
{
    use HasFactory;

    protected $fillable = ['name'];

    public function posts()
    {
        return $this->hasMany(Post::class);
    }
}