PHP code example of kingmaker / laravel-many-to-many-self-relationship

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

kingmaker / laravel-many-to-many-self-relationship example snippets

use Illuminate\Database\Eloquent\Model;
use Kingmaker\Illuminate\Eloquent\Relations\HasBelongsToManySelfRelation;

class Post extends Model {

    use HasBelongsToManySelfRelation;

    public function relatedPosts()
    {
        return $this->belongsToManySelf('related_posts', 'post1', 'post2');
    }
}

$post = Post::first();
$post->relatedPosts; // returns Collection of Related Posts

Post::find(1)->relatedPosts; // returns Posts with id 2, 3, 4
Post::find(2)->relatedPosts; // returns Posts with id 1, 3, 4
Post::find(3)->relatedPosts; // returns Posts with id 1, 2, 4
Post::find(4)->relatedPosts; // returns Posts with id 1, 2, 3

    /**
     * create the BelongsToManySelf relation on the same Model via a pivot table
     *
     * @param string $table Pivot table name
     * @param string $pivotKey1 Pivot table foreign key 1
     * @param string $pivotKey2 Pivot table foreign key 2
     * @param string|null $relatedKey Related key on the parent table
     * @param string|null $relation Relation name
     * @return BelongsToManySelf
     */
    public function belongsToManySelf(string $table, string $pivotKey1, string $pivotKey2, $relatedKey = null, $relation = null)