File upload validation fails for uploaded rule

Hi everyone.
I am having some problems getting the uploaded validation rule to work with file attachment uploads using the form helper too.

Here is the form I am using in my view file opus_index.php

PHP Code:

<?=$this->extend("layouts/base");?>
<?=$this->section("content");?>
<h4 id="pif_h4" class="text-center text-capitalize" style="margin-top: 60px;">OPUS DATA PROCESSEING</h4>
<div class="container" style="margin-top: 18px;">
  <div class="container col-7 d-flex justify-content-center">
    <?=form_open_multipart(base_url('opus/process'), ['class' => 'form-horizontal', 'id' => 'opus_data_load_form']);?>
      <div class="form-group my_fg"><!--Control Point #-->
        <?=form_label('Control Point #:', 'control_point_num', ['id' => 'control_point_num', 'class' => 'form-control-label col-sm-5 text-dark']);?>
        <div class="col-sm-12">
            <?=form_input(['type' => 'number', 'class' => 'form-control', 'name' => 'control_point_num', 'value' => set_value('control_point_num', '')]);?>
            <span class="invalidFeedback" id="control_point_num_span"><?=displayValidationError($validation, 'control_point_num')?></span>
        </div>
      </div><!---->
      <div class="form-group"><!--Northing-->
        <?=form_label('Northing:', 'cp_northing', ['id' => 'cp_northing', 'class' => 'form-control-label col-sm-5 text-dark']);?>
        <div class="col-sm-12">
            <?=form_input(['type' => 'number', 'class' => 'form-control', 'name' => 'cp_northing', 'step' => '0.0001', 'value' => set_value('cp_northing', '')]);?>
            <span class="invalidFeedback" id="cp_northing_span"><?=displayValidationError($validation, 'cp_northing')?></span>
        </div>
      </div><!---->
      <div class="form-group"><!--Easting-->
        <?=form_label('Easting:', 'cp_easting', ['id' => 'cp_easting', 'class' => 'form-control-label col-sm-5 text-dark']);?>
        <div class="col-sm-12">
            <?=form_input(['type' => 'number', 'class' => 'form-control', 'name' => 'cp_easting', 'step' => '0.0001', 'value' => set_value('cp_easting', '')]);?>
            <span class="invalidFeedback" id="cp_easting_span"><?=displayValidationError($validation, 'cp_easting')?></span>
        </div>
      </div><!---->
      <!-- <div class="container form-group row"> -->
      <div class="form-group"><!--ORTHO HGT-->
        <?=form_label('ORTHO HGT:', 'cp_ortho_hgt', ['id' => 'cp_ortho_hgt', 'class' => 'form-control-label col-sm-5 text-dark']);?>
        <div class="col-sm-12">
            <?=form_input(['type' => 'number', 'class' => 'form-control', 'name' => 'cp_ortho_hgt', 'step' => '0.001', 'value' => set_value('cp_ortho_hgt', '')]);?>
            <span class="invalidFeedback" id="cp_ortho_hgt_span"><?=displayValidationError($validation, 'cp_ortho_hgt')?></span>
        </div>
      </div><!---->
      <div class="form-group"> <!--Sky CSV-->
        <?=form_label('CSV Data File:', 'sky_csv_file', ['id' => 'sky_csv_file_upload', 'class' => 'form-control-label col-sm-8 text-darkcol-form-label text-dark']);?>
          <div class="col-sm-10">
            <?=form_upload(['class' => 'form-control-file', 'id' => 'sky_csv_file', 'name' => 'sky_csv_file', 'accept' => '.csv']);?>
            <?=form_hidden('MAX_FILE_SIZE', '67108864');?> <!--64 MB's worth in bytes. Be sure no commas are in the value if changing-->
          </div>
        <span class="invalidFeedback" id="sky_csv_file_span"><?=displayValidationError($validation, 'sky_csv_file')?></span>
      </div>
      <br>
      <div class="d-flex justify-content-center">
        <div class="col-8 text-center">
        <?=form_label('Submit for Processing', 'Submit', ['id' => 'sub_process']);?><br>
        <?=form_submit('Submit', 'Submit', ['class' => 'btn btn-sm btn-outline-primary btn-block active btn-block']);?>
        </div>
      </div>
      <?=form_close();?>
  </div>
</div>
<?=$this->endSection();?>

Note: the displayValidationError() function is a function I have in a custom helper I made for displaying validation errors in the form. (If this helps any?)
Here is the function definition:

PHP Code:

function displayValidationError($validation, string $field) {
 if (isset($validation)) {
if ($validation->hasError($field)) {
return $validation->getError($field);
}
} else {
return FALSE;
}
} 


In the controller, I have this method where I check for request type and that the submit button was clicked along with these rules for all the form fields:

PHP Code:

public function process() {
$csv_rows = array(); // used to hold the uploaded SKY file CSV data
$data = ['page_title' => 'OPUS PROCESSING',
 'validation' => NULL];

if ($this->request->getMethod() == 'post' && !empty('sub_process')) {

$rules = [
'control_point_num' => [
'rules' => 'required',
'errors' => [
 'required' => 'Control Point is required',
 ],
],
'cp_northing' => [
'rules' => 'required',
'errors' => [
 'required' => 'Northing Coordinate is required',
 ],
],
'cp_easting' => [
'rules' => 'required',
'errors' => [
 'required' => 'Easting Coordinate is required',
 ],
],
'cp_ortho_hgt' => [
'rules' => 'required',
'errors' => [
 'required' => 'ORTHO Height Coordinate is required',
 ],
],
'sky_csv_file' => [
'rules' => 'uploaded[sky_csv_file]|max_size[sky_csv_file,67108864]|ext_in[sky_csv_file,csv]',
'errors' => [
 'uploaded' => 'SKY CSV file not attached',
 'max_size' => 'File too big to upload',
 'ext_in' => 'Must be a CSV file type',
 ],
],
];

//more work here

if ($this->validate($rules)) {
// more work here

} else {
$data['validation'] = $this->validator;
}
} 


But whenever I submit the form with the file attached, I still get the error for no file attached. I am assuming for some reason it's the uploaded rule?

Does anyone know why this isn't passing the uploaded validation?

I even did a var_dump() on the post request object but the file upload field isn't even showing any data... Not sure why.

PHP Code:

var_dump($this->request->getPost());
array(6) { ["control_point_num"]=> string(3) "123" ["cp_northing"]=> string(6) "123.33" ["cp_easting"]=> string(6) "123.33" ["cp_ortho_hgt"]=> string(6) "123.33" ["MAX_FILE_SIZE"]=> string(8) "67108864" ["Submit"]=> string(6) "Submit" } 


PHP Code:

$files = $this->request->getFiles() ; 


Dump this $files and read manual, get real error exception message https://codeigniter4.github.io/CodeIgnit....html#id14
and bug test button !empty('string') - its error notice

PHP Code:

$files = $this->request->getFiles() ; 


Dump this $files and read manual, get real error exception message https://codeigniter4.github.io/CodeIgnit....html#id14
and bug test button !empty('string') - its error notice

Hi,
Thanks for your suggestion.
I tried to get file errors but according to file message and error code 0 (zero), there is no error with the file yet it fails to pass the validation still.
I'm kinda stumped as to why it is failing.
Any other suggestions are much appreciated.
Thank you.

PHP Code:

$file = $this->request->getFile('sky_csv_file');
 echo $file->getErrorString(); /*returns: The file uploaded with success.*/
echo $file->getError(); /*returns: 0*/