codeigniter: loading variables and view from within model - php

Question

I'm building an image uploading script (for the first time) in Codeigniter and the way I have it is that if the image upload form gets validated it performs the following code in a model:
public function upload($id) //function to handle the initial image upload before crop
{
$config['image_library'] = 'gd2';
$config['source_image'] = '/path/to/image/mypic.jpg';
$config['create_thumb'] = TRUE;
$config['maintain_ratio'] = TRUE;
$config['width'] = 75;
$config['height'] = 50;
$this->load->library('image_lib', $config);
$this->image_lib->resize();
$config['upload_path'] = 'images/uploads/temp/';
$config['allowed_types'] = 'gif|jpg|png';
$config['max_size'] = '2048';
$config['max_width'] = '1024';
$config['max_height'] = '768';
$this->load->library('upload', $config);
$file_data = $this->upload->data();
if ( ! $this->upload->do_upload() )//the default parameter of do_upload() is 'userfile' (meaning the name of the form input)
{
$error = '<p>Upload failed!</p> <p>Please make sure the image is in a .jpg, .gif or .png format and that it\'s no larger than 1028 x 768 pixels in dimension. Also it can\'t be more than 2MBs in size. If this problem persists, please contact webmaster#dreamsy.org.</p>';
$this->session->set_flashdata('error', $error);
redirect(base_url().'community/upload_image');
}
else
{
$image_path = base_url().'images/uploads/temp/'.$file_name;
//$data = array( 'upload_data' => $this->upload->data() );
//$this->load->view('community/upload_success');
$this->load->helper('form', 'url');
$vars['id'] = $this->uri->segment(3);
$vars['$image_path'] = $image_path;
$vars['$file_data'] = $file_data;
$this->load->vars($vars);
$this->template->write_view('content', 'community/upload_success');
$this->template->render();
}
}>template->render(); //template library
But when I call the variables that are loaded (via load->vars()) they don't get loaded and when the page loads I get "undefined variable" errors. I suspect it's not possible to pass variables from a model to the view even when the view is loaded from within the model as I have done above. Or maybe I'm just doing something incorrectly (as I'm a bit of a n00b).
Would you even take this route? Would it make more sense to pass the variables to the controller and then to load the view from the controller? Or something else I haven't considered at all? lol
Any help is greatly appreciated. Thanks in advance.
*edit:
I also have the $image_path variable inside of an

Answer 1

Would you even take this route? Would it make more sense to pass the variables to the controller and then to load the view from the controller? Or something else I haven't considered at all?
Yeah, generally speaking it is somewhat accepted to have your views talk directly to the model and vice versa but only when using a presentation layer. In the case of CI, I think it's best to have all the data loaded in from your controller to your view when you render the view like this:
$this->load->view('your-view', $data);
To pass the vars from the model to the controller you can call methods on your model like this:
// Your_Model is the class name of your model
// your_model is the variable name it gets injected into
$this->load->model('Your_Model','your_model');
$data['some_data'] = $this->your_model->get_some_data();
To define those getters in your model, you define a function like this:
function get_some_data()
{
return $this->some_data;
}
That way you create an API into your data, and you can have the getter retrieve whatever you will need in the format you will need it in.

Answer 2

Assuming the line:
$this->load->vars($vars);
is where you want to load your view, then it should be:
$this->load->view('nameofview', $vars);