2 join conditions codeigniter giving error - codeigniter

Question

I have 2 tables - for orders and for documents for these orders. I want to show all orders from first table and if there are documents for these orders, to show date of documents(I take date from table documents).
I'm trying to make 2 join conditions because in table documents if I only join on idOrder, there are more than 1 row and I have to join on documents.name to be same as $this->uri->segment(3).
But I'm using the following code and it gives me error. Could I use 2 join conditions in this way:
My model is:
<?php
public function get_all_orders($user_id){
$this->db->select('ordersheader.*, customer.name as customerName,documents.date_make');
$this->db->from('ordersheader');
$this->db->join('customer', 'ordersheader.idCustomer = customer.idCustomer');
$this->db->join('documents', 'ordersheader.idOrder = documents.idOrder','left');
$this->db->join('documents as D', 'D.name="declaration"','left');
$this->db->where('ordersheader.user_id', $user_id);
$query = $this->db->get();
return $query->result_array();
}
Edited: I found solution. But it's written in pure sql, how to write it with Codeingiter syntax? My new working code is:
<?php
$query=("SELECT ordersheader.*, customer.name as customerName,documents.date_make,documents.deactivated_at
FROM ordersheader JOIN customer ON ordersheader.idCustomer = customer.idCustomer
LEFT JOIN documents
ON ordersheader.idOrder = documents.idOrder AND documents.name = '".$document."'
WHERE ordersheader.user_id = '".$user_id."' ");
$result = $this->db->query($query);
return $result->result_array();

Answer 1

This is wrong in your query
$this->db->join('documents as D', 'D.name="declaration"','left');
you can compare column using where clause
public function get_all_orders($user_id){
$this->db->select('ordersheader.*, customer.name as customerName,documents.date_make');
$this->db->from('ordersheader');
$this->db->join('customer', 'ordersheader.idCustomer = customer.idCustomer');
$this->db->join('documents', 'ordersheader.idOrder = documents.idOrder','left');
// $this->db->join('documents as D', 'D.name="declaration"','left'); / comment this line
$this->db->where('documents.name', 'declaration');
$this->db->where('ordersheader.user_id', $user_id);
$query = $this->db->get();
return $query->result_array();
}