Codeigniter update records error - php

Question

I am using codeigniter framework, and I keep getting this error when I submit my from to post to my database.
Controller
public function profilePic()
{
if ($this->session->userdata('userLogin')) {
$user_id = $this->session->userdata('user_id');
$data = array();
if (isset($_POST['add'])) {
$pic = $this->input->post('profileFace');
$front = $this->input->post('frontView');
$left = $this->input->post('leftView');
$right = $this->input->post('rightView');
$back = $this->input->post('backView');
$updtResult = $this->main_model->updateProfilePic($pic,$front,$left,$right,$back,$user_id);
redirect("userProfile");
} else {
$data['userdata'] = $this->main_model->getUserData();
$this->load->view("frontend/ajax-view", $data);
}
} else {
redirect("/fitness");
}
}
Model
function updateProfilePic($pic,$front,$left,$right,$back,$user_id) {
$check = $this->getUserData();
if(count($check)!=0)
{
if($pic != "")
{
$data['image'] = $pic;
}
if($front != "")
{
$data['front_view'] = $front;
}
if($left != "")
{
$data['left_view'] = $left;
}
if($right != "")
{
$data['right_view'] =$right;
}
if($back != "")
{
$data['back_view'] = $back;
}
// pr($data);
$this->db->where('user_id',$user_id);
$result = $this->db->update('fitness_users', $data);
}
return $result;
}
and the error i am getting is:

Answer 1

You can use set method to update your data and check your variable is set or not using isset()
if (isset($pic) && $pic != "") {
$this->db->set("image", $pic);
}
if (isset($front) && $front != "") {
$this->db->set("front_view", $front);
}
if (isset($left) && $left != "") {
$this->db->set("left_view", $left);
}
if (isset($right) && $right != "") {
$this->db->set("right_view", $right);
}
if (isset($back) && $back != "") {
$this->db->set("back_view", $back);
}
// pr($data);
$this->db->where('user_id', $user_id);
$result = $this->db->update('fitness_users');