Form validation with optional File Upload field callback
- by MotiveKyle
I have a form with some input fields and a file upload field in the same form. I am trying to include a callback into the form validation to check for file upload errors.
Here is the controller for adding and the callback:
public function add() {
if ($this->ion_auth->logged_in()):
//validate form input
$this->form_validation->set_rules('title', 'title', 'trim|required|max_length[66]|min_length[2]');
// link url
$this->form_validation->set_rules('link', 'link', 'trim|required|max_length[255]|min_length[2]');
// optional content
$this->form_validation->set_rules('content', 'content', 'trim|min_length[2]');
$this->form_validation->set_rules('userfile', 'image', 'callback_validate_upload');
$this->form_validation->set_error_delimiters('<small class="error">', '</small>');
// if form was submitted, process form
if ($this->form_validation->run())
{
// add pin
$pin_id = $this->pin_model->create();
$slug = strtolower(url_title($this->input->post('title'), TRUE));
// path to pin folder
$file_path = './uploads/' . $pin_id . '/';
// if folder doesn't exist, create it
if (!is_dir($file_path)) {
mkdir($file_path);
}
// file upload config variables
$config['upload_path'] = $file_path;
$config['allowed_types'] = 'jpg|png';
$config['max_size'] = '2048';
$config['max_width'] = '1920';
$config['max_height'] = '1080';
$config['encrypt_name'] = TRUE;
$this->load->library('upload', $config);
// upload image file
if ($this->upload->do_upload()) {
$this->load->model('file_model');
$image_id = $this->file_model->insert_image_to_db($pin_id);
$this->file_model->add_image_id_to_pin($pin_id, $image_id);
}
}
// build page
else:
// User not logged in
redirect("login", 'refresh');
endif;
}
The callback:
function validate_upload() {
if ($_FILES AND $_FILES['userfile']['name']):
if ($this->upload->do_upload()):
return true;
else:
$this->form_validation->set_message('validate_upload', $this->upload->display_errors());
return false;
endif;
else:
return true;
endif;
}
I am getting the error Fatal error: Call to a member function do_upload() on a non-object on line 92 when I try to run this.
Line 92 is the if ($this->upload->do_upload()): line in the validate_upload callback.
Am I going about this the right way? What's triggering this error?
