How can i display error messages in CodeIgniter - codeigniter

Question

Controller:
public function add_year() {
$session_id = $this->session->userdata('id');
if (!empty($session_id)) {
$this->form_validation->set_rules('year_name', 'Year Name', 'required');
if ($this->form_validation->run() == FALSE) {
$data = array(
'page_title' => 'Add Year',
'page_name' => 'year/add_year',
'admin_username' => $this->session->userdata('username')
);
$this->load->view('admin/template', $data);
} else {
$this->year_model->insert($_POST);
redirect('admin/Year');
}
} else {
redirect('admin/Login');
}
}
Model:
public function insert($data) {
$result = $this->db->get_where('year', array('year_name' => $data['year_name']))->row_array();
if (empty($result)) {
$insert_data = array('year_name' => $data['year_name']);
$this->db->insert('year', $insert_data);
} else {
$error = "Year Name Already Exits";
return $error;
}
}
View:
<div class="text-danger">
//display error message
</div>
MY Question: How can i display model error message in view............................................................

Answer 1

use below updated code for your solution
Model :
public function insert($data) {
$result = $this->db->get_where('year', array('year_name' => $data['year_name']))->row_array();
if (empty($result)) {
$insert_data = array('year_name' => $data['year_name']);
$this->db->insert('year', $insert_data);
} else {
$error = "Year Name Already Exits";
return $error;
}
return TRUE;
}
add_year
public function add_year() {
$session_id = $this->session->userdata('id');
if (!empty($session_id)) {
$this->form_validation->set_rules('year_name', 'Year Name', 'required');
if ($this->form_validation->run() == FALSE) {
$data = array(
'page_title' => 'Add Year',
'page_name' => 'year/add_year',
'admin_username' => $this->session->userdata('username')
);
$this->load->view('admin/template', $data);
} else {
$ret = $this->year_model->insert($_POST);
if(!$ret){
$this->session->set_flashdata('error_view',$ret);
}
redirect('admin/Year');
}
} else {
redirect('admin/Login');
}
}
in view
<?php
echo $this->session->flashdata('error_view');
?>

Answer 2

Use this Code
Note : please set your table and field name in is_unique function !
Controller:
public function add_year() {
$session_id = $this->session->userdata('id');
if (!empty($session_id))
{
$this->form_validation->set_rules('year_name', 'Year Name', 'required|is_unique[table_name.field_name]');
if ($this->form_validation->run() == FALSE) {
$res['error']='<div class="alert alert-danger">'.validation_errors().'</div>';
}
else {
if( $this->year_model->insert($_POST)==true)
{
redirect('admin/Year');
}
}
} else
{
redirect('admin/Login');
}
}
Model
public function insert($data) {
$result = $this->db->get_where('year', array('year_name' => $data['year_name']))->row_array();
if (empty($result)) {
$insert_data = array('year_name' => $data['year_name']);
$this->db->insert('year', $insert_data);
return true;
} else {
return false;
}
}
View File
<div class="panel-body">
<?php if(validation_errors()) { ?>
<div class="alert alert-danger"><?php echo validation_errors(); ?></div>
<?php } ?>