codeigniter db->delete() returns true always?

Question

i have displayed table with record and \"Delete\" image. on delete image click i am deleting the record using ajax. supose there are three records with id 40,41,42 if i dele

Answer 1

when we delete from db in codeigniter 2.2.0 using $this->db->delete() we can operate with two flags: 1. $this->db->_error_message() and 2. $this->db->affected_rows()

So after db query we get 1 and 2 like:

DELETED: '', 1

NOT DELETED: '', 0 // row with id not found, but sql completed ok

SQL ERROR: string, -1

My choice is the following check:

$this->db->delete($this->table,array('id'=>$id));
if ($this->db->_error_message()) {
    $result = 'Error! ['.$this->db->_error_message().']';
} else if (!$this->db->affected_rows()) {
    $result = 'Error! ID ['.$id.'] not found';
} else {
    $result = 'Success';
}