Codeigniter always return error message - php

Question

I tried to convert the codeigniter form handling using ajax then display validation error if validation is false but in my current state, it always throw an error. Check the code below for reference.
PHP:
public function add () {
$post_data = $this->input->post('formdata');
$data = array (
'identity' => $post_data ['email'],
'password' => $post_data ['password'],
'email' => $post_data ['email'],
'group' => array($post_data['group_id']),
'additional_data' => array (
'first_name' => $post_data['first_name'],
'last_name' => $post_data['last_name'],
'active' => $post_data['active'],
'date_registered' => date('Y/m/d h:i:sa')
)
);
// custom error message
$this->form_validation->set_message('alpha_dash_space', '%s appears to be invalid. Must contain only alphabets.');
$this->form_validation->set_message('matches', '%s does not match the Confirm Password field. ');
if ($this->form_validation->run() == TRUE) {
$result['data'] = $this->ion_auth->register($data['identity'], $data['password'], $data['email'], $data['additional_data'], $data['group']);
} else {
$result['message'] = validation_errors();
}
echo json_encode($result);
}
JS:
function submit_form (form_id) {
var url = $(form_id).attr("action");
var formData = {};
$(form_id).find("input[name]").each(function (index, node) {
formData[node.name] = node.value;
});
$(form_id).find('select[name]').each(function (index, node) {
formData[node.name] = node.value;
});
$(form_id).find('textarea[name]').each(function (index, node) {
formData[node.name] = node.value;
});
$.ajax({
type: "POST",
data: {
'formdata': formData
},
url: url,
dataType: 'json',
success: function(result) {
if (result.data) {
console.log(success);
swal({
title: "Success!",
text: "You've done it great!",
type: "success"
},
function(){
location.reload();
});
} else {
$('#error-msg').html(result.message);
}
},
error: function(data) {
swal({
title: "Error!",
text: "Oops, something went wrong. Check and try again.",
type: "error"
});
}
});
}
Note: Form validation are set in config directory. So no issues in form rules. All are running good except I think the jquery that handles the condition.

Answer 1

Edit like below:
if ($this->form_validation->run() == FALSE) {
$result['message'] = validation_errors();
} else {
$result['data'] = $this->ion_auth->register($data['identity'],
$data['password'], $data['email'], $data['additional_data'],
$data['group']);
}
Also you have set_message but not set_rules. If you want to use form_validation library, you should set some rules.