笨活性記錄了與加入4名錶

Question

球員我有4表uhd_voucher_menu，uhd_menu，uhd_voucher_variant_menu，uhd_variant_menu

其中uhd_voucher_menu和uhd_menu由menu_id連接，比uhd_voucher_variant_menu和uhd_voucher_menu由voucher_menu_id最後，uhd_variant_menu和voucher_variant_menu連接連接variant_menu_id

這是我的代碼我如何獲取數據：

 $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(); 

從積極條記錄將回到這個數據：

[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" 
} 

你看到golden_salmon具有相同voucher_menu_id被退回兩次

我想如果voucher_menu_id是一樣的，所以從這個數據：

[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" 
} 

我想，數據恢復成爲本：

[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" 
} 

同其他golden_salmon具有相同voucher_menu_id4

我想variant_name被成爲陣列所以，如果用相同的voucher_menu_id數據不會調用兩次

傢伙你能幫助我如何執行數據因爲我想要的？ 謝謝（：

Answer 1

你必須，我稍微修改您使用組查詢：

$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(); 

，我們可以轉換逗號分隔值陣列查詢輸出後

嘗試發佈的結果......