php - CodeIgniter : cant get data from database -

this views : alumni/loginalumni.php

<form action="<?=site_url('controller_alumni/login/submit')?>" method="post"> username: <input type="text" name="username"/> password: <input type="password" name="pass"/> <input type="submit"  /></form> 

this controller : controller_alumni.php

public function login($submit = null){          if($submit==null){             $this->load->view('alumni/login_alumni');             return true;         }         $username=  $this->input->post('username');         $pass=  $this->input->post('pass');          $this->load->model('model_alumni');         $result = $this->model_alumni->login($username, $pass);          if($result==true){             echo 'login';         }         else{             echo 'login failed';         }                      } 

and model: model_alumni.php

public function login($username, $pass){      $query = $this->db->get_where('tb_alumni',[         'username'          => $username,         'pass'              => sha1($pass . hash_key)     ]);      return $query->result(); }  

when run, , insert username , password , : "login failed"

please change

public function login($submit = null){      if($submit==null){         $this->load->view('alumni/login_alumni');         return true;     }     $username=  $this->input->post('username');     $pass=  $this->input->post('pass');      $this->load->model('model_alumni');     $result = $this->model_alumni->login($username, $pass);      if($result==true){         echo 'login';     }     else{         echo 'login failed';     }                  } 

to

 public function login($submit = null){      if($submit==null){         $this->load->view('alumni/login_alumni');         return true;     }     $username=  $this->input->post('username');     $pass=  $this->input->post('pass');      $this->load->model('model_alumni');     $result = $this->model_alumni->login($username, $pass);      if(!empty($result)){         echo 'login';     }     else{         echo 'login failed';     }                  } 

because if user name , password correct it's return data not true , $result data . please check empty()