Execution of mySQL query in jQuery.Post method - php

Question

I have created a javascript file that contains js to trigger an event onchange of a drop down list. The JS is below:
// /public/js/custom.js
jQuery(function($) {
$("#parent").change(function(event){
event.preventDefault();
var parentID = $('#parent').val();
var id = $('#id').val();
$.post("/menu/GetMenuChildren", {pID: parentID, thisID: id },
function(data){
if(data.response === true){
var $el = $("#Position");
$el.empty(); // remove old options
$.each(data.newOptions, function(key, value) {
$el.append($("<option></option>")
.attr("value", value).text(key));
});
} else {
// print error message
alert("something went wrong in Post");
}
}, 'json');
alert("After Post");
});
});
In my Controller.php I have an function GetMenuChildrenAction as shown below:
public function GetMenuChildrenAction()
{
$request = $this->getRequest();
$response = $this->getResponse();
if ($request->isPost())
{
$post_data = $request->getPost();
$parent_id = $post_data['pID'];
$id = $post_data['thisID'];
//$this->form->get('Position')->SetOptionValues(
$newOptions = $this->getMenuTable()->GetPositionsByID($parent_id, $id);
if(isset($newOptions))
{
$response->setContent(\Zend\Json\Json::encode(array('response' => true, 'newOptions' => $newOptions)));
}
else
{
$response->setContent(\Zend\Json\Json::encode(array('response' => false)));
}
}
return $response;
}
In the MenuTable.php there is a Method GetPositionsByID as shown below:
public function GetPositionsByID($parentID, $id)
{
if($parentID == 0)
{
$menu = $this->getMenu($this->id);
$parentID = $menu->parent_id;
}
if(isset($parentID))
{
$sql = "Select ID,Label from Menu Where parent_ID = " . $parentID . " and id > 1 and id <> " . $id . " Order by Position,Label";
try
{
$statement = $this->adapter->query($sql);
}
catch(Exception $e) {
console.log('Caught exception: ', $e->getMessage(), "\n");
}
$res = $statement->execute();
$rows = array();
$i = 0;
foreach ($res as $row) {
$i = $i + 1;
$rows[$i] = array (
$i => $row['Label']
);
}
return $rows;
}
return array();
}
It all seems to be hooked up correctly, when I debug the code, I get the this line:
$statement = $this->adapter->query($sql);
and then nothing happens. If I replace all the code in the GetPositionsByID method, and simply return an array like the following:
return array('1' => 'one', '2' => 'two');
it works great, however i want to get the data from the DB. Does anyone know why the execute would fail on this line?
$statement = $this->adapter->query($sql);
Thanks in advance

Answer 1

The issue was that the adapter was null.