Codeigniter 3 Transaction - database

Question

In my code the transaction is not rolling even when i have database error.... here is the code...
Even when insert in trial or register fails the login user inserts the data...
$this->db->trans_start();
$logindata = $this->_get_login_data();
$logindata['is_deleted'] = 0;
$this->db->insert('user_login',$logindata);
//insert login data end
//insert register data begin
$registerdata = $this->_get_register_data();
$registerdata['is_active'] = 1;
$registerdata['user_login_id'] = $this->db->insert_id();
$registerdata['subscription_id'] = null;
$registerdata['login_other_accounts_id'] = null;
$registerdata['is_first_time_login'] = 1;
$registerdata['default_language_id'] = 1;
$registerdata['created_on'] = date('Y-m-d H:i:s');
$registerdata['is_deleted'] = 0;
//insert trial period begin
$trialdata['trial_period_day'] = 10;
$trialdata['is_publish'] = 0;
$trialdata['is_deleted'] = null;
$this->trial_period_model->insert('trial_period',$trialdata);
//insert trial period end
if($registerdata['is_company']==null)
$registerdata['is_company'] = 0;
$registerdata['trial_period_id'] = $this->user_model->get_last_inserted_id();
$this->upload_image();
$imagename = $this->upload->data();
$registerdata['photo_logo'] = $imagename['file_name'];
$this->user_model->insert('general_reg_info',$registerdata);
if ($this->db->trans_status() === FALSE)
{
$this->db->trans_rollback();
echo "failed";
}
else
{
$this->db->trans_commit();
echo "success";
}
//insert register data end

Answer 1

Your database type might be 'MyISAM' change the database type to 'InnoDB'