CodeIgniter Null result set from Mysql DB query - mysql

Question

I am updating an existing CI project on an AWS Ubuntu 12/PHP 4.2/CI 1.3.1 to a new AWS instance running Ubuntu 16.0.4 LTS/Apache 2.4.18/PHP 7.0.8/MySQL 5.7.15/CI 3.1.0.
I can connect and select data from mysql command line using the settings in database.php I wrote a non-CI test PHP page that also returns correct results. The same query in the model returns 0 results.
I've been tweaking the settings trying to get this to work. This is the current snapshot of database.php.
$active_group = 'default';
$query_builder = TRUE;
// 'db_debug' => (ENVIRONMENT !== 'production'),
$db['default'] = array(
'dsn' => '',
'hostname' => '127.0.0.1',
'username' => '****',
'password' => '****',
'database' => '****',
'dbdriver' => 'mysqli',
'dbprefix' => '',
'pconnect' => TRUE,
'db_debug' => FALSE,
'cache_on' => FALSE,
'cachedir' => '',
'char_set' => 'utf8',
'dbcollat' => 'utf8_general_ci',
'swap_pre' => '',
'encrypt' => FALSE,
'compress' => FALSE,
'stricton' => FALSE,
'failover' => array(),
'save_queries' => TRUE
);
Here is the applicable section of the model:
class User_model extends CI_Model
{
function __construct()
{
parent::__construct();
log_message("info","User_model class instantiated");
}
... section omitted ...
function login($username, $password)
{
$this->load->library('encrypt');
// Get the hash of the entered password to lookup in the database
//$password_hash = $this->encrypt->sha1($password); (Removed 10/8/2016 ES SHA1 deprecated)
$newpassword_hash = $this->encrypt->encode($password);
$this->db->where('user_name', $username );
$this->db->or_where('email', $username);
$query = $this->db->get('users', 1);
if($query->num_rows == 0){
log_message("info","User not found");
return false;
}
else
{
... remainder omitted ...
var_dump($this->db->last_query());
string(107) "SELECT * FROM `users` WHERE `user_name` = 'xxxxxx#gmail.com' OR `email` = 'xxxxxx#gmail.com' LIMIT 1"
var_dump($query);
object(CI_DB_mysqli_result)#23 (8) { ["conn_id"]=> object(mysqli)#15 (19) { ["affected_rows"]=> int(1) ["client_info"]=> string(79) "mysqlnd 5.0.12-dev - 20150407 - $Id: 241ae00989d1995ffcbbf63d579943635faf9972 $" ["client_version"]=> int(50012) ["connect_errno"]=> int(0) ["connect_error"]=> NULL ["errno"]=> int(0) ["error"]=> string(0) "" ["error_list"]=> array(0) { } ["field_count"]=> int(60) ["host_info"]=> string(20) "127.0.0.1 via TCP/IP" ["info"]=> NULL ["insert_id"]=> int(0) ["server_info"]=> string(23) "5.7.15-0ubuntu0.16.04.1" ["server_version"]=> int(50715) ["stat"]=> string(138) "Uptime: 229367 Threads: 7 Questions: 1083 Slow queries: 0 Opens: 440 Flush tables: 1 Open tables: 241 Queries per second avg: 0.004" ["sqlstate"]=> string(5) "00000" ["protocol_version"]=> int(10) ["thread_id"]=> int(223) ["warning_count"]=> int(0) } ["result_id"]=> object(mysqli_result)#22 (5) { ["current_field"]=> int(0) ["field_count"]=> int(60) ["lengths"]=> NULL ["num_rows"]=> int(1) ["type"]=> int(0) } ["result_array"]=> array(0) { } ["result_object"]=> array(0) { } ["custom_result_object"]=> array(0) { } ["current_row"]=> int(0) ["num_rows"]=> NULL ["row_data"]=> NULL }

Answer 1

if you use $query = $this->db->get('users', 1); this format to query in CI
then the number of rows will be achieved by as following:
$this->db->where('user_name', $username );
$this->db->or_where('email', $username);
$query = $this->db->get('users')->result_array();
if(count($query) == 0){
log_message("info","User not found");
return false;
}
else{
//do what you want
}
otherwise you can use like the following:
$query = $this->db->query('your sql here');
if($query->num_rows == 0){
log_message("info","User not found");
return false;
}
else{
//do what you want
}
Hope this may solve your problem.:)