Phalcon model is not recognizing AUTO_INCREMENT table column - php

Question

The current table Structure is:
+---------------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------------+------------------+------+-----+---------+----------------+
| id | int(10) unsigned | NO | PRI | NULL | auto_increment |
| title | varchar(25) | NO | UNI | NULL | |
| content | varchar(500) | NO | | NULL | |
+---------------+------------------+------+-----+---------+----------------+
Model:
<?php
namespace Com\Models;
use Phalcon\Mvc\Model;
use Phalcon\Mvc\Model\Validator\Uniqueness;
class Articles extends Model
{
/**
*
* #var integer
*/
public $id;
/**
*
* #var string
*/
public $title;
/**
*
* #var string
*/
public $content;
/**
* Returns table name mapped in the model.
*
* #return string
*/
public function getSource()
{
return 'articles';
}
/**
* Allows to query a set of records that match the specified conditions
*
* #param mixed $parameters
* #return Articles[]
*/
public static function find($parameters = null)
{
return parent::find($parameters);
}
/**
* Allows to query the first record that match the specified conditions
*
* #param mixed $parameters
* #return Articles
*/
public static function findFirst($parameters = null)
{
return parent::findFirst($parameters);
}
Upon saving data from controller, I am receiving this error: id is required
EDIT
Here is the snippet for the save method:
$article = new Articles();
$article->title = $this->request->getPost('title', 'striptags');
$article->content = $this->request->getPost('content');
if (!$article->save()) {
$this->flash->error($article->getMessages());
} else {
$this->flash->success("Article created.");
Tag::resetInput();
}

Answer 1

I've never had a problem with auto increment fields and Phalcon.
Only thing I can suggest is setting default to AUTO_INCREMENT

Answer 2

delete cache file
ex. "~\cache\metaData\meta-bds_models_yourmodel-your_model.php"