Zend Ajax can't delete - php

Question

I have a table named state with columns state_id, state_name. Currently I can add new states and edit them, but I can't delete states. What might be wrong with my code?
{title:"Actions",template:'<a class="left" onclick="javascript:openEditStatePopup(this);">Edit</a>' +
'<a class="right" onclick="javascript:deleteState(this);">Delete</a>'
,width:120,sortable:false}
This snippet is the view code, and when I click the link, it executes the following JavaScript:
function deleteState(element)
{
var countryDetail = {};
var GriddataItem = $("#state_grid").data("kendoGrid").dataItem($(element).closest("tr"));
countryDetail.state_id =GriddataItem.state_id;
countryDetail.state_name = GriddataItem.state_name;
// alert(countryDetail.state_id);
$.ajax({
url:"<?= $this->baseUrl('admin/state/delete')?>",
data: {state_id : countryDetail.state_id},
dataType: "json",
type: "POST",
success: function(){
alert('success');
},
failure:function(){
alert('not working');
}
});
}
When I echo alert(countryDetail.state_id) before the $.ajax call, I can get the correct state id.
My delete controller is:
public function deleteAction()
{
$state = $this->_request->_getPost('state_id');
$stateMapper = new Application_Model_Mapper_StateMapper();
$stateMapper->delete($state);
}
and the model mapper for deleting is:
public function delete(Application_Model_State $state)
{
$data = $state->toArray();
$adapter = $this->getDbTable()->getAdapter()->delete(array('state_id=?'=>$data['state_id']));
}

Answer 1

Hi you need to write deleteAction as following
public function deleteAction()
{
$state = $this->_getParam('state_id');
$stateMapper = new Application_Model_Mapper_StateMapper();
$stateId = $stateMapper->delete($state);
$this->_helper->json(array('success'=>1));
}

Answer 2

in your controller action deleteAction() you are getting POST param 'state_id'
$state = $this->_request->_getPost('state_id');
$stateMapper = new Application_Model_Mapper_StateMapper();
$stateMapper->delete($state);
and you are passing that $state in the $stateMapper->delete($state); function
in your model class function public function delete(Application_Model_State $state) definition you are passing State model object not and state id, so you should change this to
public function delete($state_id)
{
$adapter = $this->getDbTable()->getAdapter()->delete(array('state_id=?'=>$state_id));
}
Then it should work...
Another thing I have not seen
failure:function(){
alert('not working');
}
Rather it is
error:function(){
alert('not working');
}