Getting Error : Trying to get property of non object - php

Question

I am a beginner in the CodeIgniter. Working on one small basic project, while I am working on the List view I get an error " Trying to get property of non-object.
Please help me!
Here the screen shots.
Error
My code
Here is my view :
<ul id="actions">
<h4>List Actions</h4>
<li> Add Task</li>
<li> Edit List</li>
<li><a onclick="return confirm('Are you sure?')" href="<?php echo base_url();?>lists/delete/<?php echo $list_detail->id;?>"> Delete List</a></li></ul>
<h1><?php echo $list_detail->list_name; ?></h1>
Created on : <strong><?php echo date("n-j-Y",strtotime($list_detail->create_date)); ?></strong>
<br/><br/>
<div style="max-width:500px;"><?php echo $list_detail->list_body; ?></div>
<!-- <?php //echo print_r($query); ?>
-->
<br/><br/>
Here is Controller
public function show($id){
$data['list_detail'] = $this->List_model->get_lists($id);
$data['main_content']='lists/show';
$this->load->view('layout/main',$data);
}
Here is model
public function get_list($id){
$query=$this->db->get('lists');
$this->db->where('id', $id);
return $query->row();
}

Answer 1

This error is generating because you are trying to access an array in class object style.
Ex:
$data['list_details'] = 'some value';
and accessing it like:
$data->list_details; // it will generate the error "Trying to get property of non object"

Answer 2

After viewing your code. I think you have written wrong in your model function
Your model function must be like below
public function get_list($id) {
$this->db->where('id',$id);
$query = $this->db->get('lists');
return $query->row();
}
Also in your view before you print the value please check it with the condition of !empty($list_details). so if value is not there still it will not throw any error.
I hope this will help you.

Answer 3

From your controller you are calling the model function as get_lists().
But there is no function as get_lists in model. U need to change the function name in controller to get_list()

Answer 4

When your using $query->row() on your model function then on controller
Model Function
public function get_list($id) {
$this->db->where('id',$id);
$query = $this->db->get('lists');
return $query->row();
}
Controller
public function show($id){
// Gets data where it belongs with that id
$list_data = $this->model_name->get_list($id);
$data['id'] = $list_data->id;
$data['create_date'] = $list_data->create_date;
$data['list_body'] = $list_data->list_body;
$this->load->view('someview', $data);
}
When your using $query->row_array(); on your model function then on controller
public function get_list($id) {
$this->db->where('id',$id);
$query = $this->db->get('lists');
return $query->row_array();
}
Controller
public function show($id) {
// Gets data where it belongs with that id
$list_data = $this->model_name->get_list($id);
$data['id'] = $list_data['id'];
$data['create_date'] = $list_data['create_date'];
$data['list_body'] = $list_data['list_body'];
$this->load->view('someview', $data);
}
On view then you can access
<?php echo $id;?>
<?php echo $create_date;?>
<?php echo $list_body;?>
Update for multiple data
public function get_list() {
$query = $this->db->get('lists');
return $query->result();
}
Controller
$results = $this->model_name->get_list();
// Or
//$results[] = $this->model_name->get_list();
$data['list_detail'] = $results;
$this->load->view('someview', $data);
View
<?php foreach ($list_detail as $list) {?>
<?php echo $list->id;?>
<?php echo $list->create_date;?>
<?php echo $list->list_body;?>
<?php }?>