Cannot refresh row as parent is missing. Zend Framework

Question

i am getting the error "Cannot refresh row as parent is missing" when I try to save. Here is my code

abstract class Webapp_Model_Resource_Db_Table_Abstract
extends Zend_Db_Table_Abstract
{
    /**
     * Save a row to the database
     *
     *
     * @param array             $info The data to insert/update
     * @param Zend_DB_Table_Row $row Optional The row to use
     * @return mixed The primary key
     */

    public function saveRow($info, $row = null)
    {         
        if (null === $row) {
            $row = $this->createRow();
        }
        $columns = $this->info('cols');
        foreach ($columns as $column) {
            if (array_key_exists($column, $info)) {
                $row->$column = $info[$column];
            }
        }

        return $row->save();
    }
}

when I call the saveRow() method, I pass in the $_POST values ($form->getValues())

I have reused this class with my other modules in the same application but now I am getting this error and I am not sure why. My table is pretty straight forward:

CREATE TABLE `news` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `headline` varchar(100) DEFAULT NULL,
  `snippet` varchar(500) DEFAULT NULL,
  `full_text` text,
  `author` varchar(100) DEFAULT NULL,
  `publish_from` date DEFAULT NULL COMMENT 'Publish date',
  `publish_to` date DEFAULT NULL COMMENT 'Take it down or mark as draft after this date',
  `datecreated` timestamp NULL DEFAULT NULL COMMENT 'First created on',
  `revised` timestamp NULL DEFAULT CURRENT_TIMESTAMP COMMENT 'Timestamp for the last time it was revised',
  `draft` tinyint(1) DEFAULT '0' COMMENT 'Should not be published',
  `departments_id` int(11) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=214 DEFAULT CHARSET=utf8 COMMENT='Stores news articles';

Anyone know what I am doing wrong?

::::::::::::::ADDTION:::::::::::::

public function saveNews($post,$defaults = array())
    {

       //get the form
        $form = $this->getForm('article' . ucfirst($validator));
        //validate
        if(!$form->isValid($post)) {
            return false;
        }


      //get fitered values
        $data = $form->getValues();
        //apply defaults
        foreach($defaults as $col => $value) {
            $data[$col] = $value;
        }

      //get the article if it exists
        $article = array_key_exists('id', $data) ?
                   $this->getNewsById($data['id']) : null;


        return $this->saveRow($data, $article);
}

Answer 1

When you pass an empty value for the primary key, Zend seems to return this value instead of the inserted auto-increment value - even though a new row is created properly with an auto-increment value, the inserted value will not be returned.

Maybe your problem is related to this. If so, try unsetting the id field prior to saving.

Answer 2

You have to tell DbTable that there is a Auto Incrementing Primary Key by setting $_sequence either to true or the Sequence Name.

15.5.4.1. Using a Table with an Auto-incrementing Key