codeigniter Invalid argument supplied for foreach() - codeigniter

Question

I have a full working code with retrieve insert update and delete data to database.
All is working well, but if I delete some data, it is deleted but when direct to my view page again, then it will return "Invalid argument supplied for foreach()".
When I press again my view page link it is all normal and the data I delete is gone too, this is just happen with delete function.
Code :
Controller :
public function merk(){
//$data["result"] = $this->modelAdminMerk->getMerk();
$data["totalRows"] = $this->modelAdminMerk->getTotalRows();
$config["base_url"] = base_url() . "admin/merk";
$config["per_page"] = 15;
$config["total_rows"] = $data["totalRows"];
$config["uri_segment"] = 3;
$config["num_links"] = 10;
$this->pagination->initialize($config);
if( ! $this->uri->segment(3)){
$page = 0;
}else{
$page = $this->uri->segment(3);
}
$data["results"] = $this->modelAdminMerk->getMerkByPages($config["per_page"], $page);
$data["links"] = $this->pagination->create_links();
$this->load->view("adminView/adminHeader");
$this->load->view("adminView/adminMerk", $data);
$this->load->view("adminView/adminFooter");
}
public function insertMerk(){
$this->load->view("adminView/adminHeader");
$this->load->view("adminView/adminInsertMerk");
$this->load->view("adminView/adminFooter");
}
public function validateInsertMerk(){
$this->form_validation->set_rules("namaMerk", "Nama Merk", "trim|required|min_length[3]|max_length[30]");
if($this->form_validation->run()){
$newMerk = array("merk" => $this->input->post("namaMerk"));
$this->modelAdminMerk->insertMerk($newMerk);
$this->merk();
}else{
echo "GAGAL!!!";
}
}
public function editMerk($id){
$data["merk"] = $this->modelAdminMerk->getMerkById($id);
$this->load->view("adminView/adminHeader");
$this->load->view("adminView/adminEditMerk", $data);
$this->load->view("adminView/adminFooter");
}
function validateEditMerk(){
$this->form_validation->set_rules("namaMerk", "Nama Merk", "trim|required|min_length[3]|max_length[30]");
if($this->form_validation->run()){
$newMerk = array("merk" => $this->input->post("namaMerk"));
$this->modelAdminMerk->editMerk($this->input->post("id"), $newMerk);
$this->merk();
}else{
echo "GAGAL";
}
}
public function deleteMerk($id){
$this->modelAdminMerk->deleteMerk($id);
$this->merk();
}
Model :
function getMerk(){
$data = $this->db->query("SELECT * FROM merkbarang");
return $data->result();
}
function getMerkById($id){
$this->db->where("id", $id);
$data = $this->db->get("merkbarang");
return $data->row();
}
function insertMerk($newMerk){
$this->db->insert("merkbarang", $newMerk);
return true;
}
function editMerk($id, $newMerk){
$this->db->where("id", $id);
$this->db->update("merkbarang", $newMerk);
return true;
}
function deleteMerk($id){
$this->db->where("id", $id);
$this->db->delete("merkbarang");
return true;
}
function getTotalRows(){
$rows = $this->db->count_all("merkbarang");
return $rows;
}
function getMerkByPages($limit, $start){
$this->db->limit($limit, $start);
$query = $this->db->get("merkbarang");
if($query->num_rows() > 0){
foreach ($query->result() as $row){
$data[] = $row;
}
return $data;
}else{
return false;
}
}
View :
<div class="container">
<div class="row">
<div class="col-md-3">
<div class="panel panel-danger">
<div class="panel-body">
<ul class="nav nav-pills nav-stacked">
<li role="presentation" class="active">Insert Merk</li>
</ul>
</div>
</div>
</div>
<div class="col-md-9">
<div class="panel panel-default">
<div class="panel-heading">
<strong>Merk</strong>
</div>
<div class="panel-body">
<div class="row" id="tabelBarang">
<div class="col-md-1 colBarang">
<strong>No</strong>
</div>
<div class="col-md-7 colBarang">
<strong>Merk</strong>
</div>
<div class="col-md-4 colBarang">
<strong>Action</strong>
</div>
</div>
<?php
$angka = 0;
foreach ($results as $row){
$id = $row->id;
$merk = $row->merk;
?>
<div class="row" id="tabelBarang">
<div class="col-md-1 colBarang">
<?php echo ++$angka; ?>
</div>
<div class="col-md-7 colBarang">
<?php echo $merk; ?>
</div>
<div class="col-md-2 colBarang">
<button type="button" class="btn btn-info btn-xs" aria-label="Left Align">
Edit
</button>
</div>
<div class="col-md-2 colBarang">
<button type="button" class="btn btn-danger btn-xs" aria-label="Left Align">
Delete
</button>
</div>
</div>
<?php
}
?>
<?php echo $links; ?>
</div>
</div>
</div>
</div>
</div>

Answer 1

The way I see it, there is nothing wrong in your code, that should definitely work, but I would suggest you to try CI's redirect() method in your delete function
public function deleteMerk($id){
$this->modelAdminMerk->deleteMerk($id);
redirect('controllername/merk');
}