Array to string conversion error -Slim Twig- - php

Question

Setup: I have a slim application and I pulled in Illuminate DB and Twig view.
if (!$validator->passed()) {
$errors = $validator->errors();
$users = User::all();
return $this->view($response, 'auth.login', compact('errors','users'));
}
Problem: When I run the above code, I am able to retrieve the users variable in my view, but the errors variable throws the following error.
Notice: Array to string conversion in /Users/davidchen/Documents/sites/slim.com/vendor/twig/twig/lib/Twig/Environment.php(378) : eval()'d code
on line
70 Array
The errors variable returns a multidimensional array, below you'll find the result that I get from print_r($errors).
Array (
[username] => Array (
[0] => username already exists
)
[password] => Array (
[0] => password must consist of at least 6 characters
)
)
Here are my related project files:
Twig Setup File (app.php)
$c = $app->getContainer();
$capsule = new \Illuminate\Database\Capsule\Manager;
$capsule->addConnection($config['config']['db']);
$capsule->setAsGlobal();
$capsule->bootEloquent();
$c['db'] = function($c) use ($capsule){
return $capsule;
};
$c['view'] = function($c){
$options['cache']=false;
$view = new \Slim\Views\Twig(__DIR__."/../views", $options);
$view->addExtension(new \Slim\Views\TwigExtension(
$c->router,
$c->request->getUri()
));
$view->getEnvironment()->addGlobal('flash', $c->flash);
return $view;
};
$c['flash'] = function($c){
return new Slim\Flash\Messages();
};
Validator Class
namespace App\Models\Auth;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Capsule\Manager as DB;
use Carbon\Carbon;
use DateTime;
class Validator extends Model
{
protected $field_name,
$data,
$errors = [];
/*
* Main validator
*/
public function __construct($request, $fields = []){
$data = $request->getParams();
$this->data = $data;
foreach ($fields as $field => $constraints) {
$this->field_name = $field;
if (isset($data[$field])) {
$field_value = $data[$field];
foreach (explode("|", $constraints) as $constraint) {
$obj = explode(":", $constraint);
$function_name = $obj[0];
if (isset($obj[1])) {
if(method_exists($this, $function_name))
{
$this->$function_name($obj[1],$field_value);
}
}
}
}else{
if (strpos($constraints, 'required') !== false) {
$validator->report($validator->field_name.' field is requried');
}
}
}
return $this;
}
/*
* Object Interface Methods
*/
private function report($message){
$this->errors[$this->field_name][]= $message;
}
public function errors(){
return $this->errors;
}
public function passed(){
if (!count($this->errors)) {
return true;
}
}
/*
* Validation Rules
*/
public function max($length,$value){
if (strlen($value)>$length) {
$this->report("{$this->field_name} must consist of less than {$length} characters");
}
}
public function min($length,$value){
if (strlen($value)<$length) {
$this->report("{$this->field_name} must consist of atleast {$length} characters");
}
}
public function distinct($tableName,$value){
if (DB::table($tableName)->where($this->field_name, $value)->exists()) {
$this->report("{$this->field_name} already exists");
}
}
public function date($format,$date){
if (!preg_match("/\d{4}-\d{2}-\d{2}\b/",$date)) {
$this->report("incorrect {$this->field_name} values");
}else{
$d = DateTime::createFromFormat($format, $date);
if ($d && $d->format($format) !== $date) {
$this->report("{$this->field_name} format should be {$format}");
}
}
}
public function match($matchField,$value){
if (isset($this->data[$matchField])) {
$valueTwo = $this->data[$matchField];
if ($value !== $valueTwo) {
$this->report("{$this->field_name} does not match {$matchField}");
}
}else{
$this->report("{$matchField} is required");
}
}
public function format($type,$value){
switch ($type) {
case 'noWhiteSpace':
if (preg_match("/\s/",$value)) {
$this->report("{$this->field_name} may not contain any spaces");
}break;
case 'alpha':
if (preg_match("/[^a-zA-Z]/",$value)) {
$this->report("{$this->field_name} may only contain letters");
}break;
case 'alphaNum':
if (preg_match("/[^a-zA-Z0-9]/",$value)) {
$this->report("{$this->field_name} may only contain letters");
}break;
case 'email':
if (!filter_var($value, FILTER_VALIDATE_EMAIL)) {
$this->report("in correct {$this->field_name} format");
}break;
default:
# code...
break;
}
}
}
Base Controller
namespace App\Controllers;
/**
*
*/
class Controller
{
protected $c;
function __construct($container)
{
$this->c = $container;
}
public function view($response, $path,$variables = []){
$this->c->view->render($response, str_replace(".","/",$path).".twig", $variables);
}
public function pathFor($routeName,$data = []){
return $this->c->router->pathFor($routeName,$data);
}
}
Auth Controller
namespace App\Controllers\Auth;
use App\Models\User\User;
use App\Controllers\Controller;
use App\Models\Auth\Validator;
/**
*
*/
class AuthController extends Controller
{
public function getLogin($request, $response){
return $this->view($response, 'auth.login');
}
public function postLogin($request, $response){
$validator = new Validator($request,[
'username'=>'required|min:3|max:64|format:alphaNum|distinct:users',
'password'=>'required|min:6|max:64|',
]);
if (!$validator->passed()) {
$errors = $validator->errors();
$users = User::all();
return $this->view($response, 'auth.login', compact('errors','users'));
}
return $this->view($response, 'home.login');
}
}
login.twig file
login.twig file
Hope one of you can shed some light on this problem. I've been struggling with this all morning.

Answer 1

You could try to loop over each item in a sequence. For example, to display a list of users provided in a variable called users:
<h1>Members</h1>
<ul>
{% for user in users %}
<li>{{ user.username|e }}</li>
{% endfor %}
</ul>
Read more