getting an error Undefined property: stdClass::$id - codeigniter

Question

I've issue with my CMS whenever I tried to Add new page with the following line of code
<?php echo form_open_multipart('admin/page/edit/'. $page->id); ?>
it gives me error
A PHP Error was encountered
Severity: Notice
Message: Undefined property: stdClass::$id
Filename: page/edit.php
Line Number: 5
my edit function is this which perform add & update functionality
public function edit($id = NULL) {
//Fetch a page or set new one
if ($id) {
$this->data['page'] = $this->page_m->get($id);
count($this->data['page']) || $this->data['errors'][] = 'Page Could not be found';
} else {
$this->data['page'] = $this->page_m->get_new();
}
$id == NULL || $this->data['page'] = $this->page_m->get($id);
//Pages for dropdown
$this->data['pages_no_parents'] = $this->page_m->get_no_parents();
//dump($this->data['pages_no_parents']);
//Setup form
$rules = $this->page_m->rules;
$this->form_validation->set_rules($rules);
//Process the form
if ($this->form_validation->run() == TRUE) {
$data = $this->page_m->array_from_post(array(
'title',
'slug',
'order',
'body',
'template',
'parent_id',
'filename'
));
/* * ***********WORKING FOR IMAGE UPLOAD AND SAVE PATH TO DATABASE*************** */
if (!empty($_FILES['filename'])) {
$fdata = $this->do_upload('filename'); /// you are passing the parameter here
$data['filename'] = base_url() . 'uploads/' . $fdata;
}
$this->page_m->save($data, $id);
// echo '<pre>' . $this->db->last_query() . '</pre>';
redirect('admin/page');
}
//Load the view
$this->data['subview'] = 'admin/page/edit';
$this->load->view('admin/_layout_main', $this->data);
}
public function do_upload($field_name) { // but not retriveing here do this
$field_name = 'filename';
$config = array(
'allowed_types' => '*',
'max_size' => '1024',
'max_width' => '1024',
'max_height' => '768',
'upload_path' => './uploads/'
);
$this->load->library('upload');
$this->upload->initialize($config);
if (!$this->upload->do_upload($field_name)) {
echo $this->upload->display_errors();
die();
$this->data['error'] = array('error' => $this->upload->display_errors());
//$this->data['subview'] = 'admin/page/edit';
//$this->load->view('admin/_layout_main', $this->data);
} else {
$fInfo = $this->upload->data();
//return $fInfo['file_path'].$fInfo['file_name'];
// $this->filename = $fInfo;
return $fInfo['file_name'];
}
}

Answer 1

<?php echo form_open_multipart('admin/page/edit/'. ((isset($page->id)) ? $page->id : '')); ?>
As I mentioned in my comment, if you are creating a new record (I assume:) your page object will not have an id yet, so you just have to do a quick check to make sure it exists and if not output an empty string.