Unique code generation using Last Insert Id in Code Igniter? - php

Question

I need to create a drcode using the last insert id in the prescribed format,
previously I have used cor php to get the code but now in codeigniter am not able to get the code as the previous one. How can i do this? I am providing my controller and model
Controller
public function newdoctor_post() {
$employee_id = $this->post('EMPLOYEE_ID');
$doctorname = $this->post('DOCTOR_NAME');
$mobilenumber = $this->post('DRMOBILE');
$users_data = $this->Rest_user_model->doctor_exists($mobilenumber);
if ($users_data == 1) {
$message = ['status' => 2,
// 'result' => array(),
'message' => 'Doctor already registered'];
} else {
$speciality = $this->post('SPECIALITY');
$longitude = $this->post('LONGITUDE');
$latitude = $this->post('LATITUDE');
$drcode = $this->post('DRCODE');
$createdon = date('Y-m-d H:i:s');
$insert_array = array('EMPLOYEE_ID' => $employee_id, 'DOCTOR_NAME' => $doctorname, 'DRMOBILE' => $mobilenumber, 'SPECIALITY' => $speciality, 'LONGITUDE' => $longitude, 'LATITUDE' => $latitude, 'CREATEDON' => $createdon);
$users_data = $this->Rest_user_model->doctorregistration($insert_array);
$message = ['status' => 1, // 'result' => $users_data,
'message' => 'Doctor Registered Successfully'];
}
$this->set_response($message, REST_Controller::HTTP_OK);
}
Model
public function doctorregistration($data) {
if (!empty($data)) {
$this->db->insert('DOCTORDETAILS', $data);
return $this->db->insert_id();
}
return 0;
}
Code Generation
$sql1="SELECT DRCODE FROM DOCTORDETAILS ORDER BY DRCODEDESC LIMIT 1";
$query=mysql_query($sql1);
if (!$sql1) { // add this check.
die('Invalid query: ' . mysql_error());
}
$output_array2=array();
while($row=mysql_fetch_assoc($query))
{
$ids=$row['DRCODE'];
}
// echo $ids;
if($ids){
$su=1;
$num =$num = 'DR' . str_pad($su + substr($ids, 3), 6, '0', STR_PAD_LEFT);;
$unique=$num;
}else{
$unique='DR000001';
}

Answer 1

Try this - replace this code below with your Code Generation code.
$sql1="SELECT DRCODE FROM DOCTORDETAILS ORDER BY DRCODEDESC LIMIT 1";
$query=$this->db->query($sql1);
if (!$sql1) { // add this check.
die('Invalid query');
}
$output_array2=array();
foreach($query->result_array() as $row)
{
$ids=$row['DRCODE'];
}
// echo $ids;
if($ids){
$su=1;
$num =$num = 'DR' . str_pad($su + substr($ids, 3), 6, '0', STR_PAD_LEFT);;
$unique=$num;
}else{
$unique='DR000001';
}

Answer 2

You should make a different column fr drcode, leave it blank.
Now make a trigger on insert, it should be run after insert.
I am assuming DOCTORDETAILS as table name and drcode as column name
DELIMITER $$
CREATE TRIGGER trigger_after_insert
AFTER INSERT ON `DOCTORDETAILS` FOR EACH ROW
begin
UPDATE `DOCTORDETAILS` set drcode=CONCAT('DR',new.id);
END$$
DELIMITER ;
The trigger create a new string with your new auto generated id
Trigger in MySQL:
TechonTheNet
MySQL Trigger on after insert