I'm just trying to make operation which looks pretty simple but getting a strange error
Uncaught exception: 'PDOException'
Message: 'SQLSTATE[HY000]: General error: could not call class constructor'
Stack trace:
0 C:\xampp\htdocs\hotel\Core\Model.php(48): PDOStatement->fetch() 1 C:\xampp\htdocs\hotel\App\Controllers\Admin\Rooms.php(188): Core\Model::findById('98')*** 2 C:\xampp\htdocs\hotel\Core\Router.php(78): App\Controllers\Admin\Rooms::deletePhoto() 3 C:\xampp\htdocs\hotel\public\index.php(62): Core\Router->dispatch('admin/rooms/del...') 4 {main}**Thrown in 'C:\xampp\htdocs\hotel\Core\Model.php' on line 48
This is the function which causes this error.
public static function findById($id){
$sql = 'SELECT * FROM ' . static::$db_table . ' WHERE id = :id';
$db = static::getDB();
$statement = $db->prepare($sql);
$statement->bindParam(':id', $id, PDO::PARAM_INT);
$statement->setFetchMode(PDO::FETCH_CLASS, get_called_class());
$statement->execute();
return $statement->fetch();
}
I already checked composer.json psr-4 section and it looks like all directories with my classes are there. So why can I get this error?
And here is the whole class with that method
namespace Core;
use PDO;
use App\Config;
abstract class Model {
protected static function getDB()
{
static $db = null;
if ($db === null) {
$dsn = 'mysql:host=' . Config::DB_HOST . ';dbname=' .
Config::DB_NAME . ';charset=utf8';
$db = new PDO($dsn, Config::DB_USER, Config::DB_PASSWORD);
// Throw an exception when an error occurs
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}
return $db;
}
// finds everything by ID (photo, user, booking)
public static function findById($id){
$sql = 'SELECT * FROM ' . static::$db_table . ' WHERE id = :id';
$db = static::getDB();
$statement = $db->prepare($sql);
$statement->bindParam(':id', $id, PDO::PARAM_STR);
$statement->setFetchMode(PDO::FETCH_CLASS, '\App\Models\Admin\Photo');
$statement->execute();
return $statement->fetch();
}
// this method deletes via id
public static function delete($id){
$sql = 'DELETE FROM ' . static::$db_table . ' WHERE ' . static::$column . ' = :id';
$db = static::getDB();
$statament = $db->prepare($sql);
$statament->bindValue(':id', $id, PDO::PARAM_STR);
return $statament->execute();
}
// returns everything from selected database table
public static function findAll(){
$sql = 'SELECT * FROM ' . static::$db_table;
$db = static::getDB();
$stm = $db->prepare($sql);
$stm->setFetchMode(PDO::FETCH_CLASS, get_called_class());
$stm->execute();
return $stm->fetchAll();
}
}
And here my Photo class: ` namespace App\Models\Admin;
use PDO;
use \App\Config;
class Photo extends \Core\Model {
public $errors_on_upload = []; // array for saving error messages
public static $db_table = 'photos'; // database table
public static $column = 'id';
protected static $upload_derictory = 'public\uploads\picturesooms'; // path to uploaded pictures
protected static $path = '/uploads/pictures/rooms';
protected static $path_to_unlink = 'uploads/pictures/rooms/';
public $upload_errors_array = array(
UPLOAD_ERR_OK => "There is no errors",
UPLOAD_ERR_INI_SIZE => "The uploaded file exceeds max size",
UPLOAD_ERR_FORM_SIZE => "The uploaded file exceeds max size of form post request",
UPLOAD_ERR_PARTIAL => "The uploaded file was only partially uploaded",
UPLOAD_ERR_NO_FILE => "No file was uploaed",
UPLOAD_ERR_NO_TMP_DIR => "Missing the temporary folder",
UPLOAD_ERR_CANT_WRITE => "Failed to write to disk",
UPLOAD_ERR_EXTENSION => "A php extension stopped the file upload",
);
// supplied with $_FILES and input name of multiply input file
public function __construct($picture) {
// here we creates properties and their values out of keys and values
foreach($picture as $key => $value){
$this->$key = $value;
//echo $key;
}
}
// creates a easy-readable array of properties and their values out of multiply-files array from form
// must be supplied with argument in format $_FILES['input_name']
public static function reArrayFiles($file_post) {
$file_ary = array();
$file_count = count($file_post['name']);
$file_keys = array_keys($file_post);
for ($i=0; $i < $file_count; $i++){
foreach ($file_keys as $key){
$file_ary[$i][$key] = $file_post[$key][$i];
}
}
return $file_ary;
}
// this function saves photos to the database
public function save($room_id, $i){
// first validate uploaded file
$this->validatePhoto();
if(empty($this->errors_on_upload)){ // insert data only if array with errors is empty
$this->filename = time() . $this->name;
$sql = 'INSERT INTO ' . static::$db_table . ' (room_id, main, name, type, size, path) VALUES (:room_id, :main, :name, :type, :size, :path)';
$db = static::getDB();
$stm = $db->prepare($sql);
$i = ($i === 0) ? true : false;
$stm->bindValue(':room_id', $room_id, PDO::PARAM_INT);
$stm->bindValue(':main', $i, PDO::PARAM_INT);
$stm->bindValue(':name', $this->filename, PDO::PARAM_STR);
$stm->bindValue(':type', $this->type, PDO::PARAM_STR);
$stm->bindValue(':size', $this->size, PDO::PARAM_INT);
$stm->bindValue(':path', $this->pathToPicture(), PDO::PARAM_STR);
$stm->execute();
$target_path = dirname(__DIR__, 3) . Config::DS . static::$upload_derictory . Config::DS . $this->filename;
if(file_exists($target_path)){
$this->errors_on_upload[] = 'This file already exists in this directory';
return false;
}
if( !empty($this->tmp_name)){ // if tmp_name is empty, we just don't upload files
if( ! move_uploaded_file($this->tmp_name, $target_path)){
$this->errors_on_upload[] = 'The folder probably doesnt have permissions';
} else {
return true;
}
}
}
return false; // on failure
}
// this method validates pictures on upload
protected function validatePhoto(){
$extension = $this->type;
if( !empty($extension)){
if($extension != 'image/jpeg' && $extension != 'image/png' && $extension != 'image/jpg'){
$this->errors_on_upload[] = "Your file should be .jpeg, .jpg or .png";
}
}
if($this->size > Config::MAX_FILE_SIZE){
$this->errors_on_upload[] = "Your picture shouldn't be more than 10 Mb";
}
if($this->error != 0 && $this->error != 4) { //0 means no error, so if otherwise, display a respective message, 4 no files to upload, we allow that
$this->errors_on_upload[] = $this->upload_errors_array[$this->error];
}
}
protected function pathToPicture(){
return static::$path . Config::DS . $this->filename;
}
public static function findAllPhotosToONeRoom($room_id, $main_photo_only){
$sql = 'SELECT * FROM photos WHERE room_id = :id'; // we need to pass only the main picture to all_rooms template
$sql .= $main_photo_only ? ' AND main = 1' : ''; // get only main photo or all
$db = static::getDB();
$stm = $db->prepare($sql);
$stm->bindValue(':id', $room_id, PDO::PARAM_INT);
if(($stm->execute())){
if($main_photo_only){ // fetch all or only one row (for all_rooms page or for a particular room page)
$pictures = $stm->fetch();
return $pictures;
} else {
$pictures = $stm->fetchAll();
return $pictures;
}
} else {
// return a sample array with placeholder on failure instead of false to avoid further use 'false' as an array
return false;
}
}
// sets photo as a main by id and unsets prev main one
public static function setPictureAsMain($picture_id, $room_id){
// check whether id's were supplied by AJAX request
if($picture_id !== null && $room_id !== null){
// first set old main photo main column to 0
if(static::unsetMainPhoto($room_id)){
// set chosen photo as main
$sql = 'UPDATE ' . static::$db_table . ' SET main = 1 WHERE id = :picture_id';
$db = static::getDB();
$stm = $db->prepare($sql);
$stm->bindValue(':picture_id', $picture_id, PDO::PARAM_INT);
return $stm->execute();
}
}
return false;
}
// unsets main photo of a room
public static function unsetMainPhoto($room_id){
$sql = 'UPDATE ' . static::$db_table . ' SET main = 0 WHERE room_id = :room_id AND main = 1';
$db = static::getDB();
$stm = $db->prepare($sql);
$stm->bindValue(':room_id', $room_id, PDO::PARAM_INT);
return $stm->execute();
}
// this method adds photos to an existing room
public static function addPhotos($room_id, $pictures){
// array for errors
$errors_on_update = array();
foreach ($pictures as $picture){
if($picture->save($room_id, true)){
$errors_on_update[] = true;
}
}
return in_array(0, $errors_on_update, false) ? false : true;
}
// this method deletes images from upload folder
public static function unlinkImages($filename){
return unlink(static::$path_to_unlink . $filename);
}
}`
