Update back end

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

use App\Models\DivingSession;

class DiveSessionCreation extends Controller

{

    /**

     * Add

     */

    public static function add($request)

    {

        $dv = new DivingSession();

        $dv->DS_CODE = 'DS'.sizeof(DivingSession::all())+1;

        $dv->US_ID = $request->pilot;

        $dv->DL_ID = $request->location;

        $dv->BO_ID = $request->boat;

        $dv->US_ID_CAR_SECURE = $request->security;

        $dv->US_ID_CAR_DIRECT = $request->manager;

        $dv->DS_DATE = $request->day;

        $dv->DS_MAX_DEPTH = $request->maxDepth;

        $dv->DS_ACTIVE = 1;

        $dv->DS_MAX_DIVERS = $request->max;

        $dv->DS_LEVEL = $request->level;

        $dv->save();

    }

}

    protected $table = 'CAR_DIVING_LOCATION';

    protected $primaryKey = 'DL_ID';

}

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;

use Illuminate\Database\Eloquent\Model;

class Prerogative extends Model

{

    use HasFactory;

    protected $table = 'CAR_PREROGATIVE';

    protected $primaryKey = 'PRE_CODE';

    protected $keyType = 'string';

}

    protected $table = 'CAR_ROLE';

    protected $primaryKey = 'ROL_CODE';

    protected $keyType = 'string';

}