How to send validation error massage? Codeigniter - php

Question

I want to display validation error msg on registration form. Msg should be displayed when Login already exist in database.
MY error: Unable to access an error message corresponding to your field name Login_r.(rule)
Pleas try to help me, its very important. Thank you
config/form_validation.php
$config = array(
'login' => array(
array(
'field' => 'login',
'label' => 'Login',
'rules' => 'required'
),
array(
'field' => 'password',
'label' => 'Password',
'rules' => 'required'
)
),
'register' => array(
array(
'field' => 'name_r',
'label' => 'Name',
'rules' => 'required|alpha'
),
array(
'field' => 'lastname_r',
'label' => 'Lastname',
'rules' => 'required|alpha'
),
array(
'field' => 'login_r',
'label' => 'Login_r',
'rules' => 'required|callback_rule'
),
array(
'field' => 'password_r',
'label' => 'Password_r',
'rules' => 'required|min_length[4]|max_length[12]'
),
array(
'field' => 'confirm_password_r',
'label' => 'Confirm_password',
'rules' => 'required|matches[password_r]'
),
array(
'field' => 'email_r',
'label' => 'Email',
'rules' => 'required|valid_email'
),
array(
'field' => 'adres_r',
'label' => 'Adres',
'rules' => 'required'
)
),
);
Controller:
if ($this->form_validation->run('register') == false)
{
$this->form_validation->set_message('rule', 'Dzialaj !');
$this->load->view('content/register');
}
else
{
$this->load->view('content/index');
$name_r = $this->input->post('name_r');
$lastname_r = $this->input->post('lastname_r');
$login_r = $this->input->post('login_r');
$password_r = $this->input->post('password_r');
$email_r = $this->input->post('email_r');
$adres_r = $this->input->post('adres_r');
$data_db = array(
'name' => $name_r,
'lastname' => $lastname_r,
'login' => $login_r,
'password' => $password_r,
'email' => $email_r,
'adres' => $adres_r
);
$this->Main_model->register($data_db);
}
Model:
public function register($data_db) {
$this->db->where('login',$data_db['login']);
$query = $this->db->get('users');
$row = $query->row();
if($row->login){
$this->form_validation->set_message('rule', 'Error Message');
} else {
$this->db->insert('users', $data_db);
}
View(forms)
<?php
echo validation_errors();
echo form_open();
echo 'Imie: ' . form_input('name_r');
echo br(2);
echo 'Nazwisko: ' . form_input('lastname_r');
echo br(2);
echo 'Login: ' . form_input('login_r');
echo br(2);
echo 'Haslo: ' . form_password('password_r');
echo br(2);
echo 'Potwierdz Haslo: ' . form_password('confirm_password_r');
echo br(2);
echo 'E-mail: ' . form_input('email_r');
echo br(2);
echo 'Adres: ' . form_input('adres_r');
echo br(1);
echo form_submit('zarejestrowany','Stworz konto');
echo form_close();
?>
</div>
</div>
</div>
<!--Import jQuery before materialize.js-->
<script type="text/javascript" src="https://code.jquery.com/jquery-2.1.1.min.js"></script>
<script type="text/javascript" src="js/materialize.min.js"></script>
</body>
</html>

Answer 1

I'm not sure where you have your validation code you posted, that should be in the controller too. I'd suggest refactoring so you don't do any validation in the model:
Model:
public function get_user($login) {
$this->db->where('login',$login);
$query = $this->db->get('users');
$row = $query->row();
return $row;
}
public function register($data_db) {
$this->db->insert('users', $data_db);
}
Controller:
if ($this->form_validation->run('register') == false)
{
$this->form_validation->set_message('rule', 'Dzialaj !');
$this->load->view('content/register');
}
else
{
$this->load->view('content/index');
$name_r = $this->input->post('name_r');
$lastname_r = $this->input->post('lastname_r');
$login_r = $this->input->post('login_r');
$password_r = $this->input->post('password_r');
$email_r = $this->input->post('email_r');
$adres_r = $this->input->post('adres_r');
$user = $this->Main_model->get_user();
if($user->login) {
$this->form_validation->set_message('rule', 'Error Message');
redirect('content/register')
}
$data_db = array(
'name' => $name_r,
'lastname' => $lastname_r,
'login' => $login_r,
'password' => $password_r,
'email' => $email_r,
'adres' => $adres_r
);
$this->Main_model->register($data_db);
This still isn't great since I have to use a redirect if it $user->login is true, it would be even better to create the callback like I mentioned in the chat, but I don't really understand how your code is structured.

Answer 2

Your controller needs a function called "rule" (because you have a rule called "callback_rule" in your form_validation rules).
function rule($form_value)
{
if(<condition for form value is good>)
{
return TRUE;
}
else
{
$this->form_validation->set_message('login_r','your error message');
return FALSE;
}
}