codeigniter join（）メソッドでmysql関数を書くには

Question

私はcodeigniterに大きな問題があります。

codeigniter join（）関数でFIND_IN_SET mysql関数を使いたいです。しかし、問題はcodeigniterがFIND_IN_SETをフィールド名とみなすことです。

コードの下に確認してください：CodeIgniterので与えMySQLのクエリ出力で

$this->db->select("gcpo.promotional_offer_id,gcpo.promotional_offer_name,gcpo.promotional_offer_code,gcpo.promotional_offer_type,gcpo.promotional_offer_discount,gcpo.promotional_offer_min_amount,gcpo.promotional_offer_uses_per_offer,gcpo.promotional_offer_start_date,gcpo.promotional_offer_end_date,name,gcpo.promotional_offer_is_active,gcpo.promotional_offer_added_date,count(gcopo.promotional_offer_code) as cntP"); 
    $this->db->from("promotional_offer gcpo"); 
    $this->db->join("customer_groups", "FIND_IN_SET(id,promotional_offer_customer_group) > 0"); 
    $this->db->join("order_promotional_offer gcopo", "gcopo.promotional_offer_code=gcpo.promotional_offer_code","left"); 
    $this->db->group_by('gcpo.promotional_offer_code'); 
    $this->db->limit($_GET['iDisplayLength'], $start); 
    $this->db->order_by($sort_array[$_GET['iSortCol_0']], $_GET['sSortDir_0']); 
    $query = $this->db->get(); 

：

SELECT `gcpo`.`promotional_offer_id`, `gcpo`.`promotional_offer_name`, `gcpo`.`promotional_offer_code`, `gcpo`.`promotional_offer_type`, `gcpo`.`promotional_offer_discount`, `gcpo`.`promotional_offer_min_amount`, `gcpo`.`promotional_offer_uses_per_offer`, `gcpo`.`promotional_offer_start_date`, `gcpo`.`promotional_offer_end_date`, `name`, `gcpo`.`promotional_offer_is_active`, `gcpo`.`promotional_offer_added_date`, count(gcopo.promotional_offer_code) as cntP FROM (`gc_promotional_offer` gcpo) JOIN `gc_customer_groups` ON `FIND_IN_SET`(`id,promotional_offer_customer_group)` > 0 LEFT JOIN `gc_order_promotional_offer` gcopo ON `gcopo`.`promotional_offer_code`=`gcpo`.`promotional_offer_code` GROUP BY `gcpo`.`promotional_offer_code` ORDER BY `gcpo`.`promotional_offer_added_date` desc LIMIT 10 

を、今あなたがで検討し、フィールド名のようにありますmysqlのクエリでFIND_IN_SET機能を見つけてくださいcodeigniter。

Answer 1

FIND_IN_SETは制限機能ですが、whereで使用します。まず、customer_groupsに参加し、結果をwhereで制限する必要があります。

条件を__PUT JOIN CONDITION HERE__に変更し、正しい表の別名をプレフィックスFIND_IN_SETに付けます。

$this->db->select("gcpo.promotional_offer_id,gcpo.promotional_offer_name,gcpo.promotional_offer_code,gcpo.promotional_offer_type,gcpo.promotional_offer_discount,gcpo.promotional_offer_min_amount,gcpo.promotional_offer_uses_per_offer,gcpo.promotional_offer_start_date,gcpo.promotional_offer_end_date,name,gcpo.promotional_offer_is_active,gcpo.promotional_offer_added_date,count(gcopo.promotional_offer_code) as cntP"); 
$this->db->from("promotional_offer gcpo"); 
$this->db->join("order_promotional_offer gcopo", "gcopo.promotional_offer_code=gcpo.promotional_offer_code","left"); 
$this->db->join("customer_groups", "__PUT JOIN CONDITION HERE__"); 
$this->db->where("FIND_IN_SET(id,promotional_offer_customer_group) > 0"); 
$this->db->group_by('gcpo.promotional_offer_code'); 
$this->db->limit($_GET['iDisplayLength'], $start); 
$this->db->order_by($sort_array[$_GET['iSortCol_0']], $_GET['sSortDir_0']); 
$query = $this->db->get();