At the time of update my where condition is not working - php

Question

In my first table(ts_users) update opening user_opening_balance at the same time, I want to update that user_opening_balance in my second table(ts_voucher) column is voucher_amount. But in my second table table(ts_voucher) voucher_amount updates all columns amount.
My code:
public function updateConsignor($myData){
extract($myData);
$this->db->set('user_full_name' , $user_full_name);
$this->db->set('user_opening_balance' , $user_opening_balance);
$this->db->where('user_id', $user_id);
if($this->db->update('ts_users')){
$userId = $myData['user_id'];
$this->db->trans_begin();
$openingBalTrxn = array(
'voucher_amount' => $myData['user_opening_balance'],
);
$this->db->update('ts_voucher', $openingBalTrxn);
$this->db->where('voucher_person_account_id',$userId);
if ($this->db->trans_status() === false){
$this->db->trans_rollback();
return false;
}else{
$this->db->trans_commit();
return true;
}
return $query_result;
return true;
}else{
return false;
}
}
I am giving where condition
$this->db->update('ts_voucher', $openingBalTrxn);
$this->db->where('voucher_person_account_id',$userId);
for update one record it updates all voucher_amount column record

Answer 1

you need to run first your .where before your .update. See documentation here
$this->db->where('voucher_person_account_id',$userId);
$this->db->update('ts_voucher', $openingBalTrxn);

Answer 2

Your update query false. where clause first and other condition where first than update function call just copy this function and fix your problem.
public function updateConsignor($myData){
extract($myData);
$this->db->set('user_full_name' , $user_full_name);
$this->db->set('user_opening_balance' , $user_opening_balance);
$this->db->where('user_id', $user_id);
if($this->db->update('ts_users')){
$userId = $myData['user_id'];
$this->db->trans_begin();
$openingBalTrxn = array(
'voucher_amount' => $myData['user_opening_balance'],
);
$this->db->where('voucher_person_account_id',$userId);
$this->db->update('ts_voucher', $openingBalTrxn);
if ($this->db->trans_status() === false){
$this->db->trans_rollback();
return false;
}else{
$this->db->trans_commit();
return true;
}
return $query_result;
return true;
}else{
return false;
}

Answer 3

Your update operation is working before the 'where' condition has a chance to work. That's why it's updating all records. Simply put the where condition first, then update.