CODEIGNITER call to a member function num rows on boolean - php

Question

please i have an issue with codeigniter. when i try to log here is the result:
Fatal error: Call to a member function num_rows() on boolean in D:\xampp\htdocs\procurementSys\application\models\login_model.php on line 19
Below tho code of the relative file:
<?php
class Login_model extends CI_Model {
//this function checks whether the username and the password is in the database or not
public function check_login($username, $password){
$this->db->select('username, password, status');
$array = array('username' => $username, 'password' => sha1($password),'status' => 'active');
$this->db->where($array);
$query = $this->db->get('user');
if($query->num_rows() == 1) // if the affected number of rows is one
{
return true;
}
else
{
return false;
}
}
//this function returns the status of the user to be used in authentication
public function user_login_data($username, $password){
$this->db->select('status');
$array = array('username' => $username, 'password' => sha1($password));
$this->db->where($array);
$query = $this->db->get('user');
if($query->num_rows() == 1) // if the affected number of rows is one
{
$row = $query->row();
return $row->status;
}
// else
// {
// return false;
// }
}
public function user_role($username){ // this function gets the user's role from the database
$this->db->select('role');
$this->db->where('username', $username);
$query = $this->db->get('user');
$row = $query->row(0);
return $row->role;
}
public function department($username){ // this function gets the user's department from the database
$this->db->select('department');
$this->db->where('username', $username);
$query = $this->db->get('user');
$row = $query->row(0); // returns the first row with an array of objects that is stored in the row variable
return $row->department;
}
public function get_user_id($username){ // this function gets the user's department from the database
$this->db->select('userID');
$this->db->where('username', $username);
$query = $this->db->get('user');
$row = $query->row(0); // returns the first row with an array of objects that is stored in the row variable
return $row->userID ;
}
public function fullname($username){
$this->db->select('firstName, secondName');
$this->db->where('username', $username);
$query = $this->db->get('user');
$row = $query->row(0);
return $row;
// foreach($query->result() as $row) // returns the query as an array of objects
// {
// $data[] = $row; // equates the array of objects to an array variable
// }
//
// return $data;
// }
}
}
?>
I kept searching for a solution and found this post (Call to a member function num_rows() on boolean) . It gave me an idea but no real help. thanks

Answer 1

I got this error with MySQL Strict Mode enabled. When I disable Strict Mode, error disappeared.
To check this mode is already enabled
SHOW VARIABLES LIKE 'sql_mode';
To make it disabled
SET GLOBAL sql_mode = 'NO_ENGINE_SUBSTITUTION';

Answer 2

Something like this for the count:
$this->db->select('id');
$this->db->from('table');
$this->db->where($your_conditions);
$num_results = $this->db->count_all_results();

Answer 3

**Try something like this **
//this function checks whether the username and the password is in the database or not
public function check_login($username, $password){
$this->db->select('username, password, status');
$array = array('username' => $username, 'password' => sha1($password),'status' => 'active');
$this->db->where($array);
$query = $this->db->get('user');
$result = $query->result();
if($result->num_rows() == 1) // if the affected number of rows is one
{
return true;
}
else
{
return false;
}
}

Answer 4

CODEIGNITER send boolean as result if there is not result
for example as per your method
public function check_login($username, $password){
$this->db->select('username, password, status');
$array = array('username' => $username, 'password' => sha1($password),'status' => 'active');
$this->db->where($array);
$query = $this->db->get('user');
if($query->num_rows() == 1) // if the affected number of rows is one
{
return true;
}
else
{
return false;
}
If there is no data in table it send False while we are expecting some object on which we can work so before calling $query->num_rows() check if it is an object or not so code can be like :
$query = $this->db->get('user');
if(is_object($query)){
if($query->num_rows() == 1) // if the affected number of rows is one
{
return true;
}
}else{
return false;
}

Answer 5

You can write like that. It will work smoothly.
if($query !== FALSE && $query->num_rows() == 1) // if the affected number of rows is one
{
return true;
}
else
{
return false;
}