Zend Framework 1.12, execution of raw SQL inserts the same record twice - zend-framework

Question

I know there´s a similar situation in stack, and I´ve already checked it out and the answers have not guided me to mine.
Here´s the deal:
I need to execute raw SQL, an INSERT to be precise. I have multiple values to insert as well. No problem since Zend let´s you use "query" from Zend_Db_Table (I use my default adapter, initialized in my application.ini file).
$db_adapter = Zend_Db_Table::getDefaultAdapter();
....query gets built...
$stmt = $db_adapter->query($query);
$stmt->execute();
When doing var_dump($query); this is what I see:
INSERT INTO tableName (col1,col2,col3) VALUES ('value1', 'value2', 'value3')
I have already tried the following:
I have no "manifesto" attribute on the html page rendered
I have looked at the network both with Chrome and Firefox to see the POSTS/GETS getting sent, and the controller whose actions does
this INSERT gets called once with a POST.
It is true that I call a viewscript from another action to be rendered, like so:
$this->renderScript('rough-draft/edit.phtml');
I don´t see how that could affect the statement getting executed twice.
I know it gets executed twice:
Before the POST is sent, the data base has nothing, clean as a whistle
POST gets sent, logic happens, from is rendered again
Data base now has the same record twice (with the name that has been inserted from the POST), so it´s not a rendering problem
It has to do with the way I am executing raw SQL, because if I use ->insert($data) method that comes with Zend_Db_Table_Abstract (obviously I declare a class that extends from this abstract one and bind it to the appropriate table) it does not insert the record twice. Thing is, I want to use raw SQL.
I really appreciate your help!
Expanded as requested:
Controller code:
public function saveAction()
{
$request = $this->getRequest();
if (!$request->isPost())
$this->_sendToErrorPage();
$this->_edit_roughdraft->saveForm($request->getPost());
$this->view->form = $this->_edit_roughdraft->getForm();
$this->renderScript('rough-draft/edit.phtml');
}
Code from model class (in charge of saving the form from the data in POST):
public function saveForm($form_data) {
$db = new Application_Model_DbTable_RoughDrafts();
$id = $form_data['id'];
$db->update($this->_get_main_data($form_data), array('id=?' => $id));
/* Main data pertains to getting an array with the data that belongs to yes/no buttons
* and text input. I need to do it as so because the other data belongs to a dynamically
* built (by the user) multi_select where the options need to be deleted or inserted, that
* happens below
*/
$multi_selects = array('responsables', 'tareas', 'idiomas', 'habilidades', 'perfiles');
foreach($multi_selects as $multi_select){
if(isset($form_data[$multi_select]) && !empty($form_data[$multi_select])){
$function_name = '_save_'.$multi_select;
$this->$function_name($form_data[$multi_select], $id);
}
}
$this->_form = $this->createNewForm($id, true);
//The createNewForm(..) simply loads data from data_base and populates form
}
I do want to make clear though that I have also used $db->insert($data), where $db is a class that extends from Zend_Db_Table_Abstract (associated to a table). In this case, the record is inserted once and only once. That´s what leads me to believe that the problem lies within the execution of my raw sql, I just don´t know what is wrong with it.

Answer 1

I should have done this from the beginning, thanks for the help everyone, I appreciate your time.
I knew the problem was with my syntax, but I didn´t know why. After looking at different examples for how people did the raw sql execution, I still didn´t understand why. So I went ahead and opened the class Zend_Db_Adapter_Abstract in Zend library and looked for the 'query()' method I was using to get the statement to execute.
public function query($sql, $bind = array())
{
...some logic...
// prepare and execute the statement with profiling
$stmt = $this->prepare($sql);
**$stmt->execute($bind);**
// return the results embedded in the prepared statement object
$stmt->setFetchMode($this->_fetchMode);
return $stmt;
}
So the ->query(..) method from the Zend_Db_Adapter already executes said query. So if I call
->execute() on the statement that it returns, I'll be the one causing the second insert.
Working code:
$db_adapter = Zend_Db_Table::getDefaultAdapter();
....query gets built...
$db_adapter->query($query);