CodeIgniter form validation radio button not working - codeigniter

Question

I have a form with 3 radio buttons. The IDs are unique in the form, and all three have the same name, namely "vehicle_type". The radio buttons are generated correctly when I do source view
<input type="radio" name="vehicle_type" id="type_vehicle" value="1">
<input type="radio" name="vehicle_type" id="type_trailer" value="2" checked>
<input type="radio" name="vehicle_type" id="type_plant" value="3">
I have no validation rule set for the radio group, yet my form complains that the field is required.
I can confirm that there is no validation rule by running:
echo $this->form_validation->has_rule('vehicle_type');
It indicates no validation. Using that call on another field, i.e., client_name, returns "boolean: 1"
Why would the field try to validate if there is no validation rule set?
EDIT
I am using Wiredesignz HMVC in my project, so the Form_validation class is extended.
if ($this->form_validation->run($this)) {
$test = do_file_upload($post_data);
} else {
var_dump(validation_errors());
// echos "The Vehicle type field is required"
}
This problem only occurs with radio buttons:
All other forms without radio buttons validate correctly using the same check: ($this->form_validation->run($this)
My form validation is set with this function:
public function set_form_validation_rules($data)
{
foreach ($data as $field) {
if (!empty($field['validation']['rules'])) {
if (!is_array($field['validation']['rules'])) {
$this->form_validation->set_rules($field['name'], $field['label'], $field['validation']['rules']);
} else {
foreach ($field['validation']['rules'] as $fv) {
$this->form_validation->set_rules($field['name'], $field['label'], $fv);
}
}
}
}
}
And the radio button is defined as:
$data['fields']['type_plant'] = [
'name' => 'vehicle_type',
'id' => 'type_plant',
'input_class' => 'input-group width-100',
'color' => 'red',
'value' => 3,
'validation' => '',
'checked' => ($posts['vehicle_type'] == 3)
];
The other two radio buttons in the group are the same, just have different values and IDs.

Answer 1

Use this,
$this->form_validation->set_rules('vehicle_type', 'Vehicle type', 'required');

Answer 2

Load library for form validation and other helpers in application/config/autoload.php
$autoload['libraries'] = array('form_validation');
$autoload['helper'] = array('form', 'url');
In your controller file :
$this->form_validation->set_rules('vehicle_type', 'Vehicle Type', 'required');
In your view file use below code for printing validation errors
<?php echo validation_errors(); ?>

Answer 3

The answers given above tells me how to use form validation. It is not what I requested. I am far beyond that - as they all worked, except for radio buttons. As it turns out, passing the validation array incorrectly to the function in the $data array. Once I passed the data correctly, the form validation also worked.

Answer 4

Hey Bro Try this maybe it can help
This method is very simple
In form
<div class="form-group">
<label for="vehicle_type" class="col-sm-3 control-label">vehicle</label>
<div class="col-sm-9">
<div class="col-md-3">
<label><input type="radio" name="vehicle_type" id="vehicle_type" value="1"> ONE </label>
</div>
<div class="col-md-3">
<label><input type="radio" name="vehicle_type" value="2"> TWO </label>
</div>
<div class="col-md-3">
<label><input type="radio" name="vehicle_type" value="3"> THREE </label>
</div>
<small class="info help-block"></small>
</div>
</div>
Set Your Controller
public function add_save(){
if ($this->input->post('vehicle_type') == "1"){
}else if($this->input->post('vehicle_type') == "2"){
}else if($this->input->post('vehicle_type') == "3"){
}else{
$this->form_validation->set_rules('vehicle_type', 'Vehicle', 'required');
}
if ($this->form_validation->run()) {
$save = [
'vehicle_type' => $this->input->post('vehicle_type')
];
$this->model_yourmoderl->add($save);
} else {
$this->data['errors'] = $this->form_validation->error_array();
}
$this->response($this->data);
}