CodeIgniter - how to catch DB errors? - php

Question

Is there a way to make CI throw an exception when it encounters a DB error instead of displaying a message like:
A Database Error Occurred Error Number: 1054
Unknown column 'foo' in 'where clause' SELECT * FROM (FooBar) WHERE foo = '1'
NOTE: I only want this to happen in one controller. In the other controllers, I'm happy for it to display the DB error messages.

Answer 1

Use error() method:
$this->db->error();
For CodeIgniter 2, you can use the following functions which are now deprecated:
$this->db->_error_message(); (mysql_error equivalent)
$this->db->_error_number(); (mysql_errno equivalent)

Answer 2

Maybe this:
$db_debug = $this->db->db_debug; //save setting
$this->db->db_debug = FALSE; //disable debugging for queries
$result = $this->db->query($sql); //run query
//check for errors, etc
$this->db->db_debug = $db_debug; //restore setting

Answer 3

In Codeigniter 3.0 (CI3), all you have to do is $this->db->error()
If you need to get the last error that has occured, the error() method will return an array containing its code and message
http://www.codeigniter.com/user_guide/database/queries.html#handling-errors

Answer 4

You must turn debug off for database in config/database.php ->
$db['default']['db_debug'] = FALSE;
It is better for your website security.

Answer 5

I know this thread is old, but just in case there's someone else having this issue. This is a trick I used without touching the CI db classes. Leave your debug on and in your error view file, throw an exception.
So in you db config, you have :
$db['default']['db_debug'] = true;
Then in your db error view file, mine is in application/errors/error_db.php replace all content with the following:
<?php
$message = preg_replace('/(<\/?p>)+/', ' ', $message);
throw new Exception("Database error occured with message : {$message}");
?>
Since the view file will be called, the error will always get thrown as an exception, you may later add different views for different environment.

Answer 6

An example that worked for me:
$query = "some buggy sql statement";
$this->db->db_debug = false;
if(!#$this->db->query($query))
{
$error = $this->db->error();
// do something in error case
}else{
// do something in success case
}
...

Answer 7

I have created an simple library for that:
<?php
defined('BASEPATH') OR exit('No direct script access allowed');
class exceptions {
public function checkForError() {
get_instance()->load->database();
$error = get_instance()->db->error();
if ($error['code'])
throw new MySQLException($error);
}
}
abstract class UserException extends Exception {
public abstract function getUserMessage();
}
class MySQLException extends UserException {
private $errorNumber;
private $errorMessage;
public function __construct(array $error) {
$this->errorNumber = "Error Code(" . $error['code'] . ")";
$this->errorMessage = $error['message'];
}
public function getUserMessage() {
return array(
"error" => array (
"code" => $this->errorNumber,
"message" => $this->errorMessage
)
);
}
}
The example query:
function insertId($id){
$data = array(
'id' => $id,
);
$this->db->insert('test', $data);
$this->exceptions->checkForError();
return $this->db->insert_id();
}
And I can catch it this way in my controller:
try {
$this->insertThings->insertId("1");
} catch (UserException $error){
//do whatever you want when there is an mysql error
}

Answer 8

Put this code in a file called MY_Exceptions.php in application/core folder:
<?php
if (!defined('BASEPATH'))
exit('No direct script access allowed');
/**
* Class dealing with errors as exceptions
*/
class MY_Exceptions extends CI_Exceptions
{
/**
* Force exception throwing on erros
*/
public function show_error($heading, $message, $template = 'error_general', $status_code = 500)
{
set_status_header($status_code);
$message = implode(" / ", (!is_array($message)) ? array($message) : $message);
throw new CiError($message);
}
}
/**
* Captured error from Code Igniter
*/
class CiError extends Exception
{
}
It will make all the Code Igniter errors to be treated as Exception (CiError). Then, turn all your database debug on:
$db['default']['db_debug'] = true;

Answer 9

Use it
$this->db->_error_message();
It is better for finding error.After completing your site.
Close the error messages
using it
$db['default']['db_debug'] = FALSE;
You will change it in your config folder's database.php

Answer 10

Disable debugging of errors.
$data_user = $this->getDataUser();
$id_user = $this->getId_user();
$this->db->db_debug = false;
$this->db->where(['id' => $id_user]);
$res = $this->db->update(self::$table, $data_user['user']);
if(!$res)
{
$error = $this->db->error();
return $error;
//return array $error['code'] & $error['message']
}
else
{
return 1;
}

Answer 11

If one uses PDO, additional to all the answers above.
I log my errors silently as below
$q = $this->db->conn_id->prepare($query);
if($q instanceof PDOStatement) {
// go on with bind values and execute
} else {
$dbError = $this->db->error();
$this->Logger_model->logError('Db Error', date('Y-m-d H:i:s'), __METHOD__.' Line '.__LINE__, 'Code: '.$dbError['code'].' - '.'Message: '.$dbError['message']);
}

Answer 12

In sybase_driver.php
/**
* Manejador de Mensajes de Error Sybase
* Autor: Isaí Moreno
* Fecha: 06/Nov/2019
*/
static $CODE_ERROR_SYBASE;
public static function SetCodeErrorSybase($Code) {
if ($Code != 3621) { /*No se toma en cuenta el código de command aborted*/
CI_DB_sybase_driver::$CODE_ERROR_SYBASE = trim(CI_DB_sybase_driver::$CODE_ERROR_SYBASE.' '.$Code);
}
}
public static function GetCodeErrorSybase() {
return CI_DB_sybase_driver::$CODE_ERROR_SYBASE;
}
public static function msg_handler($msgnumber, $severity, $state, $line, $text)
{
log_message('info', 'CI_DB_sybase_driver - CODE ERROR ['.$msgnumber.'] Mensaje - '.$text);
CI_DB_sybase_driver::SetCodeErrorSybase($msgnumber);
}
// ------------------------------------------------------------------------
Add and modify the following methods in the same sybase_driver.php file
/**
* The error message number
*
* #access private
* #return integer
*/
function _error_number()
{
// Are error numbers supported?
return CI_DB_sybase_driver::GetCodeErrorSybase();
}
function _sybase_set_message_handler()
{
// Are error numbers supported?
return sybase_set_message_handler('CI_DB_sybase_driver::msg_handler');
}
Implement in the function of a controller.
public function Eliminar_DUPLA(){
if($this->session->userdata($this->config->item('mycfg_session_object_name'))){
//***/
$Operacion_Borrado_Exitosa=false;
$this->db->trans_begin();
$this->db->_sybase_set_message_handler(); <<<<<------- Activar Manejador de errores de sybase
$Dupla_Eliminada=$this->Mi_Modelo->QUERY_Eliminar_Dupla($PARAMETROS);
if ($Dupla_Eliminada){
$this->db->trans_commit();
MostrarNotificacion("Se eliminó DUPLA exitosamente","OK",true);
$Operacion_Borrado_Exitosa=true;
}else{
$Error = $this->db->_error_number(); <<<<----- Obtengo el código de error de sybase para personilzar mensaje al usuario
$this->db->trans_rollback();
MostrarNotificacion("Ocurrio un error al intentar eliminar Dupla","Error",true);
if ($Error == 547) {
MostrarNotificacion("<strong>Código de error :[".$Error.']. No se puede eliminar documento Padre.</strong>',"Error",true);
} else {
MostrarNotificacion("<strong>Código de Error :[".$Error.']</strong><br>',"Error",true);
}
}
echo "#".Obtener_Contador_Notificaciones();
if ($Operacion_Borrado_Exitosa){
echo "#T";
}else{
echo "#F";
}
}else{
redirect($this->router->default_controller);
}
}
In the log you can check the codes and messages sent by the database server.
INFO - 2019-11-06 19:26:33 -> CI_DB_sybase_driver - CODE ERROR [547] Message - Dependent foreign key constraint violation in a referential integrity constraint. dbname = 'database', table name = 'mitabla', constraint name = 'FK_SR_RELAC_REFERENCE_SR_mitabla'. INFO - 2019-11-06 19:26:33 -> CI_DB_sybase_driver - CODE ERROR [3621] Message - Command has been aborted. ERROR - 2019-11-06 19:26:33 -> Query error: - Invalid query: delete from mitabla where ID = 1019.