clqms-be/app/Models/AreaGeoModel.php

<?php
namespace App\Models;

use App\Models\BaseModel;

class AreaGeoModel extends BaseModel {
    protected $table      = 'areageo';
    protected $primaryKey = 'AreaGeoID';
    protected $allowedFields = ['Parent', 'AreaCode', 'Class', 'AreaName']; 
 
    public function getAreaGeos() {
			if (!empty($filters['AreaGeoID'])) {
				$this->where('AreaGeoID', $filters['AreaGeoID']);
			}
			if (!empty($filters['AreaName'])) {
				$this->like('AreaName', $filters['AreaName'], 'both');
			}
      
			return $this->findAll();
    }

    public function getProvinces() {
			$rows = $this->select('AreaGeoID, AreaName')
				->orGroupStart()
					->where('Parent', null)
					->orWhere('Parent', 0)
				->groupEnd()->findAll();
			
		return $rows;
	}

	public function getCities($filter) {
		$this->select('AreaGeoID, AreaName')->where('Parent > 0');
		if(!empty($filter['Parent'])){
			$this->where('Parent', $filter['Parent']);
		}
		return $this->findAll();
	}

}