codeigniter flexigrid ทำแล้วไม่ลบฐานข้อมูล ไม่ทราบจะแก้อย่างไรดีครับ

<?php
echo $js_grid;
?>
<script type="text/javascript">

function test(com,grid)
{
    if (com=='Select All')
    {
		$('.bDiv tbody tr',grid).addClass('trSelected');
    }
    
    if (com=='DeSelect All')
    {
		$('.bDiv tbody tr',grid).removeClass('trSelected');
    }
    
    if (com=='Delete')
        {
           if($('.trSelected',grid).length>0){
			   if(confirm('Delete ' + $('.trSelected',grid).length + ' items?')){
		            var items = $('.trSelected',grid);
		            var itemlist ='';
		        	for(i=0;i<items.length;i++){
						itemlist+= items[i].id.substr(3)+",";
					}
					$.ajax({
					   type: "POST",
					   url: "<?=site_url("/ajax1/deletec");?>",
					   data: "items="+itemlist,
					   success: function(data){
					   	$('#flex1').flexReload();
					  	alert(data);
					   }
					});
				}
			} else {
				return false;
			} 
        }          
} 
</script>

<?php
echo $js_grid2;
?>
<script type="text/javascript">

function test(com,grid)
{
    if (com=='Select All')
    {
		$('.bDiv tbody tr',grid).addClass('trSelected');
    }
    
    if (com=='DeSelect All')
    {
		$('.bDiv tbody tr',grid).removeClass('trSelected');
    }
    
    if (com=='Delete')
        {
           if($('.trSelected',grid).length>0){
			   if(confirm('Delete ' + $('.trSelected',grid).length + ' items?')){
		            var items = $('.trSelected',grid);
		            var itemlist ='';
		        	for(i=0;i<items.length;i++){
						itemlist+= items[i].id.substr(3)+",";
					}
					$.ajax({
					   type: "POST",
					   url: "<?=site_url("/ajax1/deletecDomain");?>",
					   data: "items="+itemlist,
					   success: function(data){
					   	$('#flex2').flexReload();
					  	alert(data);
					   }
					});
				}
			} else {
				return false;
			} 
        }          
} 
</script>

<?php
class Flexigrid extends Controller {

	function Flexigrid  ()
	{
		parent::Controller();	
		$this->load->helper('flexigrid_helzzzz');
	}
	
	function index()
	{
		
		$colModel['id'] = array('ID',40,TRUE,'center',2);
		$colModel['iso'] = array('ISO',40,TRUE,'center',0);
		$colModel['name'] = array('Name',180,TRUE,'left',1);
		$colModel['printable_name'] = array('Printable Name',120,TRUE,'left',0);
		$colModel['iso3'] = array('ISO3',130, TRUE,'left',0);
		$colModel['numcode'] = array('Number Code',80, TRUE, 'right',1);
		$colModel['actions'] = array('Actions',80, FALSE, 'right',0);
		
		
		$colModel2['id'] = array('ID',40,TRUE,'center',2);
		$colModel2['name'] = array('NAME',40,TRUE,'center',0);
		$colModel2['last_name'] = array('LAST NAME',180,TRUE,'left',1);
		
		
		/*
		 * Aditional Parameters
		 */
		$gridParams = array(
		'width' => '800',
		'height' => 400,
		'rp' => 15,
		'rpOptions' => '[10,15,20,25,40]',
		'pagestat' => 'Displaying: {from} to {to} of {total} items.',
		'blockOpacity' => 0.5,
		'title' => 'Hello  1111',
		'showTableToggleBtn' => true
		);
		
		
	
		$gridParams2 = array(
		'width' => '500',
		'height' => 400,
		'rp' => 15,
		'rpOptions' => '[10,15,20,25,40]',
		'pagestat' => 'Displaying: {from} to {to} of {total} items.',
		'blockOpacity' => 0.5,
		'title' => 'Hello  222',
		'showTableToggleBtn' => true
		);
	
		
		/*
		 * 0 - display name
		 * 1 - bclass
		 * 2 - onpress
		 */
		 
		 
		 
		$buttons[] = array('Delete','delete','test');
		$buttons[] = array('separator');
		$buttons[] = array('Select All','add','test');
		$buttons[] = array('DeSelect All','delete','test');
		$buttons[] = array('separator');
		
		
		//Build js
		//View helpers/flexigrid_helper.php for more information about the params on this function
		$grid_js = build_grid_js1('flex1',site_url("/ajax1/index1"),$colModel,'id','asc',$gridParams,$buttons);
		$data['js_grid'] = $grid_js;
		
		$grid_js1 = build_grid_js1('flex2',site_url("/ajax1/index2"),$colModel2,'id','asc',$gridParams2,$buttons);
		$data['js_grid2'] = $grid_js1;
	
		
		
		$this->load->view('flexigrid_tem',$data);
	}
	
	
	
}

class Ajax1 extends Controller {

	function Ajax1 ()
	{
		parent::Controller();	
		$this->load->model('ajax_model');
		$this->load->model('ajax_model1');
		$this->load->library('flexigrid_lib');
	}
	
	function index1()
	{
		//List of all fields that can be sortable. This is Optional.
		//This prevents that a user sorts by a column that we dont want him to access, or that doesnt exist, preventing errors.
		$valid_fields = array('id','iso','name','printable_name','iso3','numcode');
		
		$this->flexigrid_lib->validate_post('id','asc',$valid_fields);

		$records = $this->ajax_model->get_countries();
		
		$this->output->set_header($this->config->item('json_header'));
		
		/*
		 * Json build WITH json_encode. If you do not have this function please read
		 * http://flexigrid.eyeviewdesign.com/index.php/flexigrid/example#s3 to know how to use the alternative
		 */
		foreach ($records['records']->result() as $row)
		{
			$record_items[] = array($row->id,
			$row->id,
			$row->iso,
			$row->name,
			'<span style=\'color:#ff4400\'>'.addslashes($row->printable_name).'</span>',
			$row->iso3,
			$row->numcode,
			'<a href=\'#\'><img border=\'0\' src=\''.$this->config->item('base_url').'public/images/close.png\'></a> '
			);
		}
		//Print please
		$this->output->set_output($this->flexigrid_lib->json_build($records['record_count'],$record_items));
	}
	//Delete Country
	function deletec()
	{
		$countries_ids_post_array = split(",",$this->input->post('items'));
		
		foreach($countries_ids_post_array as $index => $country_id)
			if (is_numeric($country_id) && $country_id > 1) 
				$this->ajax_model->delete_country($country_id);
						
			
		$error = "Selected countries (id's: ".$this->input->post('items').") deleted with success";

		$this->output->set_header($this->config->item('ajax_header'));
		$this->output->set_output($error);
	}
	
	
	function index2()
	{
		//List of all fields that can be sortable. This is Optional.
		//This prevents that a user sorts by a column that we dont want him to access, or that doesnt exist, preventing errors.
		$valid_fields = array('id','name','last_name');
		
		$this->flexigrid_lib->validate_post('id','asc',$valid_fields);

		$records = $this->ajax_model1->get_domains();
		
		$this->output->set_header($this->config->item('json_header'));
		
		/*
		 * Json build WITH json_encode. If you do not have this function please read
		 * http://flexigrid.eyeviewdesign.com/index.php/flexigrid/example#s3 to know how to use the alternative
		*/
		foreach ($records['records']->result() as $row)
		{
			$record_items[] = array($row->id,
			$row->id,
			$row->name,
			$row->last_name
			);
		}
		//Print please
		$this->output->set_output($this->flexigrid_lib->json_build($records['record_count'],$record_items));
	}
	 
	
	//Delete Country
	function deletecDomain()
	{
		$domains_ids_post_array = split(",",$this->input->post('items'));
		
		foreach($domains_ids_post_array as $index => $domain_id)
			if (is_numeric($domain_id) && $domain_id > 1) 
				$this->ajax_model1->delete_domains($domain_id);
						
			
		$error = "Selected domains (id's: ".$this->input->post('items').") deleted with success";

		$this->output->set_header($this->config->item('ajax_header'));
		$this->output->set_output($error);
	}
	
}
?>

class Ajax_model extends Model 
{
	/**
	* Instanciar o CI
	*/
	public function Ajax_model()
    {
        parent::Model();
		$this->CI =& get_instance();
    }
	
	public function get_countries() 
	{
		//Select table name
		$table_name = "country";
		
		//Build contents query
		$this->db->select('id,iso,name,printable_name,iso3,numcode')->from($table_name);
		$this->CI->flexigrid_lib->build_query();
		
		//Get contents
		$return['records'] = $this->db->get();
		
		//Build count query
		$this->db->select('count(id) as record_count')->from($table_name);
		$this->CI->flexigrid_lib->build_query(FALSE);
		$record_count = $this->db->get();
		$row = $record_count->row();
		
		//Get Record Count
		$return['record_count'] = $row->record_count;
	
		//Return all
		return $return;
	}
	
	/**
	* Remove country
	* @param int country id
	* @return boolean
	*/
	public function delete_country($country_id) 
	{
		$delete_country = $this->db->query('DELETE FROM country WHERE id='.$country_id);
		
		return TRUE;
	}

class Ajax_model1 extends Model 
{
	/**
	* Instanciar o CI
	*/
	public function Ajax_model1()
    {
        parent::Model();
		$this->CI =& get_instance();
    }
	
	public function get_domains() 
	{
		//Select table name
		$table_name = "domains";
		
		//Build contents query
		$this->db->select('id,name,last_name')->from($table_name);
		$this->CI->flexigrid_lib->build_query();
		
		//Get contents
		$return['records'] = $this->db->get();
		
		//Build count query
		$this->db->select('count(id) as record_count')->from($table_name);
		$this->CI->flexigrid_lib->build_query(FALSE);
		$record_count = $this->db->get();
		$row = $record_count->row();
		
		//Get Record Count
		$return['record_count'] = $row->record_count;
	
		//Return all
		return $return;
	}
	
	/**
	* Remove country
	* @param int country id
	* @return boolean
	*/
	public function delete_domains($domain_id) 
	{
		$delete_domain = $this->db->query('delete FROM country WHERE id='.$domain_id);
		
		return TRUE;
	}
}
?>