How to join these tables in codeigniter - php

Question

I am facing problem to join these tables and also know how to make controller code to view data in view file with text boxes.
public function get_order_return_info()
{
$this->db->select('tbl_order_details.*', false);
$this->db->select('tbl_order_details.order_details_id', false);
$this->db->select('tbl_order.order_id', false);
$this->db->select('tbl_product.product_id', false);
$this->db->select('tbl_inventory.product_quantity', false);
$this->db->from('tbl_order_details');
$this->db->join('tbl_order', 'tbl_order_details.order_id = tbl_order.order_id ', 'left');
$this->db->join('tbl_product', 'tbl_order_details.product_code = tbl_product.product_id ', 'left');
$this->db->join('tbl_inventory', 'tbl_product.product_id = tbl_inventory.product_id ', 'left');
$query_result = $this->db->get();
$result = $query_result->result();
return $result;
}

Answer 1

You can use MVC to solve this
//Controller
function get_data() {
$data['list'] = $this->your_model->get_data();
$this->load->view('your_view/location',$data);
}
//Model
function get_data() {
$sql = "your_query";
$list = $this->db->query($sql)->result_array();
return $list;
}
//View
foreach($list as $data) {
echo $data['your_selected_field']; // it could be table,text field,or just text
}
API Reference : https://www.codeigniter.com/user_guide/database/results.html#result-arrays
Hope this helps

Answer 2

First u can create OrderModel to work with order table. Then create function get_order_data.
//Order Model
public function get_orders() {
// your db query to get orders
return $result;
}
Then u can load model in controller using $this->load->model('OrderModel'); Best place is __construct to load model
And call your get_orders() function
// Your controller
// Create data array to store front data
$data = [];
$data['orders'] = $this->OrderModel->get_orders();
After getting $orders pass it to view using following codes
$this->load->view('path/to/view', $data);
Finally u can call your order data in view using $orders
I hope this will help u

Answer 3

You need to set alias to the table to function it properly like this.
$this->db->select('a.*,a.order_details_id, b.order_id ', false);
$this->db->from('tbl_order_details as a');
$this->db->join('tbl_order as b', 'a.order_id = b.order_id ', 'left');
If you want select 1 row only you need to use this function.
$this->db->get('tbl_order_details')->row_array();
or if you want all result row you need to use this.
$this->db->get('tbl_order_details')->result_array();
On your controller you should add this lines to pass your result on your view page.
public function index()
{
$data['orderDetails'] = $this->your_model->get_order_return_info();
$this->load->view('pages/yourview/index',$data);
}
And finally to set your order details to the text boxes. You need to echo it inside the text boxes like this.
<input type="Text" name="orderID" value="<?php echo $orderDetails['order_id'];?>" >
If you use result_array() you need to use foreach loop to echo it.