Prevent Duplicate Entry php with Codeigniter - php

Question

I am trying to prevent duplicate entries with codeigniter, but it doesn't work anymore.
The data still insert to database despite the same name.
This is the controller code
public function add(){
$title['title']='Add New';
$data['data']='Insert New Group';
$data['exist']= 'This Group already exists';
$this->load->view('add_pbk_g', $data);
}
public function save(){
$this->load->helper(array('form', 'url'));
$this->load->library('form_validation');
$this->form_validation->set_rules('namegroup', 'Name', 'trim|required|is_unique[pbk_groups.Name]');
if($this->form_validation->run()==false){
$this->add_pbk_g($Name);
} else{
$this->db->insert('pbk_groups',array('Name'=> $this->input->post('namegroup')));
$this->load->model('mpbk_grup');
if($this->mpbk_grup->check_grup_exist('$Name')){
$title['title']='Add New';
$data['data']='Insert New Group';
$data['exist']= 'This Group already exists';
$this->load->view('layout/header', $title);
$this->load->view('add_pbk_g');
$this->load->view('layout/footer');
} else{
$this->mpbk_grup->add;
redirect('cpbk_grup/index');
}
}
}
this is the Model..
function add($data){
return $this->db->create('pbk_groups', $data);
}
function check_grup_exist($namegroup){
$this->db->where('Name', $namegroup);
$this->db->from('pbk_groups');
$query = $this->db->get();
if($query->num_rows() >0){
return $query->result();
} else {
return $query->result();
//return False;
}
}
and this is the view
<form method="post" class="form-horizontal" action="<?php echo site_url('cpbk_grup/save');?>">
<div class="box-body">
<?php echo validation_errors(); ?>
<div class="form-group">
<label class="col-sm-2 control-label">Nama Group</label>
<div class="col-sm-10">
<input type="text" name="namegroup" required="" class="form-control" placeholder="Nama Group">
</div>
</div>
</div>
<!-- /.box-body -->
<div class="box-footer">
<button type="submit" name="submit" value="submit" class="btn btn-info pull-right">Save</button>
Kembali
</div>
<!-- /.box-footer -->
</form>

Answer 1

public function save(){
$this->load->helper(array('form', 'url'));
$this->load->library('form_validation');
$this->form_validation->set_rules('namegroup', 'Name', 'trim|required|is_unique[pbk_groups.Name]');
if($this->form_validation->run()==false){
$this->add_pbk_g($Name);
} else{
$data = array ('Name' => $this->input->post('namegroup'));
$this->mpbk_grup->check_grup_exist($data);
}
}

Answer 2

Where does $Name on this line come from?
if($this->mpbk_grup->check_grup_exist('$Name')){
Also it should not have quotes around it, should be...
if($this->mpbk_grup->check_grup_exist($Name)){

Answer 3

Try doing this inside save function
Controller Code:
$data = array('Name' => $this->input->post('namegroup'));
$this->Model_Name->check_grup_exist($data);
My Model
Model_Name
$this->main_table = 'pbk_groups';
public function check_grup_exist($data)
{
$query = $this->db->get_where($this->main_table, array('Name' => $data['Name']));
if ($query->num_rows() == 0)
{
$this->db->insert($this->main_table, $data);
return $this->db->insert_id();
}
else
{
return false;
}
Checking duplication data before inserting the data. Let me know if any query occurs.