Problem with Model()->find() and Model()->findAll()

Tell us about BaseModel. Does it extend CodeIgniter\Model? What are your namespace statements?

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Model already has $table and $primaryKey properties. Shouldn't your model have a constructor, where it sets those?

Code:

public function __construct() {
  parent::__construct();
  $this->table = 'users';
}

You don't initialize the $DBGroup property, which might affect your outcome.

The docs show assignments to those and other Model properties in the class definition. Since the values are not typically used in a dynamic way there is no reason not to do it that way.

I have app/Models/BaseModel which extends CodeIgniter\Model and contains some methods specific for my project.

PHP Code:

namespace App\Models;

use App\Models\Main\UserModel;
use Carbon\Carbon;
use CodeIgniter\Model;
use CodeIgniter\Database\ConnectionInterface;
use CodeIgniter\Validation\ValidationInterface;
use Config\App;
use Config\Services;

class BaseModel extends Model
{

    /**
     * @var \CodeIgniter\Session\Session
     */
    public $session;

    /**
     * @var $locale
     */
    public $locale;

    /**
     * @var string|string[]
     */
    public $lang;

    /**
     * Meta params for AJAX requests
     * @var array
     */
    public $meta = [];

    public function __construct(ConnectionInterface &$db = null, ValidationInterface $validation = null) {
        parent::__construct($db, $validation);
        $this->session = \Config\Services::session();
        $this->locale = $this->getUserLang();
        $this->lang = Services::language($this->locale)->getLine('app.lang', []);
    }
} 


All my model extends BaseModel, and before update to last version I don't call __construct() in sub classes. 
For example, i put code of one class which building menu. I rewrited it with MenuModel()->get()->getResutArray(), because findAll() don't work after all. 

PHP Code:

<?php


namespace App\Models\Main;


use App\Models\BaseModel;

class MenuModel extends BaseModel
{

    protected $table      = 'menu';

    protected $primaryKey = 'id';

    protected $returnType = 'array';

    protected $deletedField = 'deleted';

    /**
     * Get list of all category and subcategory
     * @return array|bool
     */
    public function getMenu() {
        if($data = $items = $this->select("id, url, module, icon, title_{$this->locale} title, parent")
            ->where('deleted', 0)
            ->orderBy('order', 'ASC')
            ->findAll()
        ) {
            $result = [];
            $user_access = (new AccessModel())->getUserAccess((new UserModel())->id());

            array_map(function($item) use(&$result, &$user_access) {
                if (boolval($item['parent'])) {
                    if (array_key_exists($item['parent'], $result)) {
                        $result[$item['parent']]['child'][$item['id']] = $item;
                    } else {
                        foreach ($result as &$value) {
                            if(isset($value['child']) && array_key_exists($item['parent'], $value['child'])) {
                                $value['child'][$item['parent']]['child'][] = $item;
                            }
                        }
                    }
                }else{
                    if ($user_access[$item['module']]){
                        $result[$item['id']] = $item;
                    }
                }
            }, $data);
            return $result;
        }
        return false;
    }

}