php - Codeigniter CRUD app: error updating a record (trying to get property of non-object) -

i have put crud application codeigniter 3. update form has data validation set up, through controller:

update function:

public function update($customer_id) {         // data validation         $this->form_validation->set_rules('first_name', 'first name', 'required');         $this->form_validation->set_rules('last_name', 'last name', 'required');         $this->form_validation->set_rules('email', 'email address', 'required|valid_email');         $this->form_validation->set_error_delimiters('<p class="error">', '</p>');          if ($this->form_validation->run()) {             $data = [             // insert these database table fields             'first_name' => $this->input->post('first_name'),             'last_name' => $this->input->post('last_name'),             'email' => $this->input->post('email')             ];             $this->load->model('customer');             if ($this->customer->updatecustomer($customer_id, $data)) {                 $this->session->set_flashdata('update-response','customer updated');             } else {                 $this->session->set_flashdata('update-response','failed update customer');             }             redirect('home');         } else {         $data = [                    'first_name' => $this->input->post('first_name'),             'last_name' => $this->input->post('last_name'),             'email' => $this->input->post('email'),             'id' => $customer_id         ];         $this->load->view('update', array("customer" => $data));     } } 

it does go through if, not through else.

update form:

<?php echo form_open("home/update/{$customer->id}"); ?>      <div class="form-group <?php if(form_error('first_name')) echo 'has-error';?>">         <?php echo form_input('first_name', set_value('first_name', $customer->first_name),[             'id' => 'first_name',             'class' => 'form-control'             ]);         if(form_error('first_name')) echo '<span class="glyphicon glyphicon-remove"></span>';         echo form_error('first_name'); ?>                                          </div>      <div class="form-group">         <?php echo form_submit('submit', 'save', 'class = "btn btn-success btn-block"'); ?>     </div>  <?php echo form_close(); ?> 

the update model is:

public function getallcustomers($customer_id) {     $query = $this->db->get_where('customers', array('id' => $customer_id));     if ($query->num_rows() > 0) {         return $query->row();     } }  public function updatecustomer($customer_id, $data) {     return $this->db->where('id', $customer_id)->update('customers', $data); } 

the update view:

<?php echo form_open("home/update/{$customer->id}"); ?> 

there problem editing record, inputting invalid data, hitting "save button":

severity: notice message: trying property of non-object filename: views/update.php 

such problem appears only on update form. cause of this?

in else replace this:

} else {         $data = [                    'first_name' => $this->input->post('first_name'),             'last_name' => $this->input->post('last_name'),             'email' => $this->input->post('email'),             'id' => $customer_id         ];         $this->load->view('update', array("customer" => $data));     }