Codeigniter active records with join 4 table - php

Question

guys i have 4 table uhd_voucher_menu, uhd_menu, uhd_voucher_variant_menu, uhd_variant_menu
which uhd_voucher_menu and uhd_menu is connected by menu_id, than uhd_voucher_variant_menu and uhd_voucher_menu is connected by voucher_menu_id and the last, uhd_variant_menu and voucher_variant_menu is connected by variant_menu_id
this is my code how i get the data :
$this->db->select("uhd_voucher_menu.voucher_id,uhd_menu.menu_name,uhd_voucher_menu.qty,uhd_variant_menu.variant_name,uhd_voucher_menu.voucher_menu_id");
$this->db->from("uhd_voucher_menu");
$this->db->join("uhd_menu","uhd_menu.menu_id = uhd_voucher_menu.menu_id");
$this->db->join("uhd_voucher_variant_menu","uhd_voucher_variant_menu.voucher_menu_id = uhd_voucher_menu.voucher_menu_id","left");
$this->db->join("uhd_variant_menu","uhd_variant_menu.variant_menu_id = uhd_voucher_variant_menu.variant_menu_id","left");
$this->db->where("voucher_id",$data["voucher"]["voucher_id"]);
$this->db->where("uhd_menu.restaurant_id",$restaurant_id);
$res = $this->db->get()->result_array();
from that active recored will be return to this data :
[0]=>
array(5) {
["voucher_id"]=>
string(1) "1"
["menu_name"]=>
string(13) "Golden Salmon"
["qty"]=>
string(1) "2"
["variant_name"]=>
string(5) "Spicy"
["voucher_menu_id"]=>
string(1) "3"
}
[1]=>
array(5) {
["voucher_id"]=>
string(1) "1"
["menu_name"]=>
string(13) "Golden Salmon"
["qty"]=>
string(1) "2"
["variant_name"]=>
string(6) "Medium"
["voucher_menu_id"]=>
string(1) "3"
}
[2]=>
array(5) {
["voucher_id"]=>
string(1) "1"
["menu_name"]=>
string(13) "Golden Salmon"
["qty"]=>
string(1) "1"
["variant_name"]=>
string(4) "Sour"
["voucher_menu_id"]=>
string(1) "4"
}
[3]=>
array(5) {
["voucher_id"]=>
string(1) "1"
["menu_name"]=>
string(13) "Golden Salmon"
["qty"]=>
string(1) "1"
["variant_name"]=>
string(6) "Medium"
["voucher_menu_id"]=>
string(1) "4"
}
[4]=>
array(5) {
["voucher_id"]=>
string(1) "1"
["menu_name"]=>
string(14) "Red Crown Crab"
["qty"]=>
string(1) "2"
["variant_name"]=>
NULL
["voucher_menu_id"]=>
string(1) "1"
}
[5]=>
array(5) {
["voucher_id"]=>
string(1) "1"
["menu_name"]=>
string(8) "Omellete"
["qty"]=>
string(1) "3"
["variant_name"]=>
NULL
["voucher_menu_id"]=>
string(1) "2"
}
as you see the golden_salmon with same voucher_menu_id is return twice
i want if the voucher_menu_id is same, so from this data :
[0]=>
array(5) {
["voucher_id"]=>
string(1) "1"
["menu_name"]=>
string(13) "Golden Salmon"
["qty"]=>
string(1) "2"
["variant_name"]=>
string(5) "Spicy"
["voucher_menu_id"]=>
string(1) "3"
}
[1]=>
array(5) {
["voucher_id"]=>
string(1) "1"
["menu_name"]=>
string(13) "Golden Salmon"
["qty"]=>
string(1) "2"
["variant_name"]=>
string(6) "Medium"
["voucher_menu_id"]=>
string(1) "3"
}
i want that data return to become this :
[0]=>
array(5) {
["voucher_id"]=>
string(1) "1"
["menu_name"]=>
string(13) "Golden Salmon"
["qty"]=>
string(1) "2"
["variant_name"]=>
array(2){
[1]=>
string(5) "Spicy"
[2]=>
string(6) "Medium"
}
["voucher_menu_id"]=>
string(1) "3"
}
same as the other golden_salmon with same voucher_menu_id 4
i want the variant_name is become array so the if data with same voucher_menu_id will not call twice
guys can you help me how to execute the data as i want?
thank you (:

Answer 1

You have to use group by, I slightly modified you query:
$this->db->select("uhd_voucher_menu.voucher_id,uhd_menu.menu_name,uhd_voucher_menu.qty,GROUP_CONCAT(uhd_variant_menu.variant_name SEPARATOR ',') AS variants,uhd_voucher_menu.voucher_menu_id");
$this->db->from("uhd_voucher_menu");
$this->db->join("uhd_menu","uhd_menu.menu_id = uhd_voucher_menu.menu_id");
$this->db->join("uhd_voucher_variant_menu","uhd_voucher_variant_menu.voucher_menu_id = uhd_voucher_menu.voucher_menu_id","left");
$this->db->join("uhd_variant_menu","uhd_variant_menu.variant_menu_id = uhd_voucher_variant_menu.variant_menu_id","left");
$this->db->where("voucher_id",$data["voucher"]["voucher_id"]);
$this->db->where("uhd_menu.restaurant_id",$restaurant_id);
$this->db->group_by("uhd_voucher_menu.voucher_id");
$res = $this->db->get()->result_array();
we can convert the comma seperated values to array after query output.
Try and post the result...