Convert SQL JOIN Query to SQL Codeigniter [duplicate] - php

Question

This question already has answers here:
Nested joins in Codeigniter
(2 answers)
Closed 1 year ago.
I am new to Codeigniter, and I want to convert the SQL query into the Codeigniter-style query
My query looks like this :
SELECT tbl_detail_order.ID, tbl_detail_order.order_id, tbl_detail_order.produk, products.name, tbl_detail_order.qty, tbl_detail_order.harga, tbl_order.tanggal, tbl_pelanggan.nama, tbl_pelanggan.alamat, tbl_pelanggan.telp
FROM tbl_pelanggan
INNER JOIN (tbl_order INNER JOIN
(products INNER JOIN tbl_detail_order
ON products.kd_barang = tbl_detail_order.produk)
ON tbl_order.ID = tbl_detail_order.order_id)
ON tbl_pelanggan.ID = tbl_order.pelanggan;
And I try to make it in Codeigniter like this
public function getAllJoin()
{
$this->db->select('tbl_detail_order.ID, tbl_detail_order.order_id, tbl_detail_order.produk, products.name, tbl_detail_order.qty, tbl_detail_order.harga, tbl_order.tanggal, tbl_pelanggan.nama, tbl_pelanggan.alamat, tbl_pelanggan.telp');
$this->db->from('tbl_detail_order');
$this->db->join('tbl_order','tbl_detail_order.order_id = tbl_order.id','INNER');
$this->db->join('tbl_pelanggan','tbl_order.pelanggan = tbl_pelanggan.id','INNER');
$this->db->join('products','products.kd_barang = tbl_pelanggan.id','INNER');
$query = $this->db->get();
return $query->result_array();
}
Can you correct my code? Is it wrong or right?

Answer 1

As this other post mentions, there isn't an API for nested joins in the CodeIgniter DB syntax. So you just use the outer one, and move the rest inline with that.
public function getAllJoin()
{
$this->db->select('tbl_detail_order.ID, tbl_detail_order.order_id, tbl_detail_order.produk, products.name, tbl_detail_order.qty, tbl_detail_order.harga, tbl_order.tanggal, tbl_pelanggan.nama, tbl_pelanggan.alamat, tbl_pelanggan.telp');
$this->db->from('tbl_detail_order');
$this->db->join('tbl_order INNER JOIN (products INNER JOIN tbl_detail_order ON products.kd_barang = tbl_detail_order.produk) ON tbl_order.ID = tbl_detail_order.order_id','tbl_detail_order.order_id = tbl_order.id','INNER');
$query = $this->db->get();
return $query->result_array();
}