Call to undefined method CodeIgniter\Database\MySQLi\Connection::like() - php

Question

I have i like query in my model but it doesn't work
Model:
<?php namespace App\Models;
use CodeIgniter\Model;
class SearchModel extends Model
{
protected $table = 'sport_tbl';
protected $primaryKey = 'id';
protected $returnType = 'array';
public function search($word)
{
$this->db->like('title', $word);
$res = $this->db->get('sport_tbl')->result_array();
return $res;
}
}
Controller:
<?php namespace App\Controllers\api;
use App\Controllers\BaseController;
use App\Models\SearchModel;
class Search extends BaseController
{
public function index()
{
$searchModel = new SearchModel();
$data['allnews'] = $searchModel->search('test');
return view('welcome_message', $data);
}
}
And this is error:
Call to undefined method CodeIgniter\Database\MySQLi\Connection::like()

Answer 1

You are basically using the old query builder style from Codeigniter 3 instead of Codeigniter 4.
In Codeigniter 4 your code should look like this.
<?php namespace App\Models;
use CodeIgniter\Model;
class SearchModel extends Model
{
protected $table = 'sport_tbl';
protected $primaryKey = 'id';
protected $returnType = 'array';
public function search($word)
{
$db = \Config\Database::connect();
$builder = $db->table('sport_tbl');
$builder->like('title', $word);
return $builder->get()->getResultArray();
}
}
In this case your controller should be just the same.
However there's another way of doing the same without creating a new database object and using the same one that is being automatically created for you.
<?php namespace App\Models;
use CodeIgniter\Model;
class SearchModel extends Model
{
protected $table = 'sport_tbl';
protected $primaryKey = 'id';
protected $returnType = 'array';
public function search($word)
{
$this->like('title', $word);
return $builder->get()->getResultArray();
}
}
In this case your controller should be a bit different:
<?php namespace App\Controllers\api;
use App\Controllers\BaseController;
use App\Models\SearchModel;
class Search extends BaseController
{
public function index()
{
$searchModel = new SearchModel();
$data['allnews'] = $searchModel->search('test')->getAll();
return view('welcome_message', $data);
}
}
The second version of the code is actually better because that way your can have as many functions you want in your model and then just call them in a chain statement always returning $this.