ldc-legaulois/app/Models/SubRange.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Support\Str;

class SubRange extends Model
{

    protected $fillable = [
        'name', 'picture_alt',
        'back_link_url', 'back_link_text',
        'title', 'subtitle', 'content'
    ];

    protected static function booted()
    {
        static::creating(function (SubRange $subRange) {
            $subRange->title = clean($subRange->title);
            $subRange->content = clean($subRange->content);
            $subRange->slug = Str::slug($subRange->name);
        });
        static::updating(function (SubRange $subRange) {
            $subRange->title = clean($subRange->title);
            $subRange->content = clean($subRange->content);
            $subRange->slug = Str::slug($subRange->name);
        });
    }

    public function ranges()
    {
        return $this->belongsToMany(Range::class, 'range_sub_range');
    }
}