codeigniter get returned data variable from model in controller and use it in conditional statement - codeigniter

Question

what is wrong with my search implementation, here what i wish to achieve.
view page(form) -> controller(form data variable) -> model(query database and pass to controller) if there's a result return TRUE else return FALSE -> controller(get data from model) if true display data in table else if FALSE display a no results returned message.
here are my pages:
view:
<form action="<?php echo site_url('retrieve')?>" method="post">
<input type="text" name="id">
....
</form>
model:
public function retrieve($id)
{
$search = "SELECT * FROM table";
$result = $this->db->conn_id->prepare($search);
$result->execute();
if($result->rowCount()>0){
return $query_result = $result->fetchAll(PDO::FETCH_ASSOC);
}
}
controller:
public function retrieve_info()
{
$id = $this->input->post('id'),
$this->load->model('search_model');
$this->search_model->retrieve($id);
$data['query_result'] = $this->search_model->retrieve($id);
$this->load->view('display',$data);
}

Answer 1

First the form action is linking to the retrieve function in the controller. However, from your example there is no retrieve function in your controller, only in your model.
view:
<form action="<?php echo site_url('retrieve')?>" method="post">
<input type="text" name="id">
....
</form>
model:
public function retrieve($id)
{
$search = "SELECT * FROM table";
$result = $this->db->conn_id->prepare($search);
$result->execute();
if($result->rowCount()>0){
return $query_result = $result->fetchAll(PDO::FETCH_ASSOC);
}
}
controller:
public function retrieve()
{
if($_POST){
$id = $this->input->post('id'),
$this->load->model('search_model');
$data['query_result'] = $this->search_model->retrieve($id);
$this->load->view('display',$data);
}else {
//form failed to submit via post
}
}