Codeigniter form validation is not showing - codeigniter

Question

for somehow my codeigniter form validation is not showing on login page
given below is my login page in view
<div class="full_w">
<p>Food4U</p>
<?php echo validation_errors(); ?>
<?php echo form_open('staff/valid_login'); ?>
<label for="city">Select City</label>
<select name="city" class="text">
<option value="">Select City</option>
<?php echo $this->front_model->get_Fcities(); ?>
</select>
<label for="login">Username:</label>
<input id="login" name="username" class="text" />
<label for="pass">Password:</label>
<input id="pass" name="password" type="password" class="text" />
<div class="sep"></div>
<button type="submit" class="ok">Login</button>
<a class="button" href="">Change Password</a>
<?php echo form_close(); ?>
</form>
</div>
given below are functions in controller
function valid_login()
{
$this->form_validation->set_rules('city','City','required|trim|xss_clean|callback_validate_credentials');
$this->form_validation->set_rules('username','Username','required|trim|xss_clean|callback_validate_credentials');
$this->form_validation->set_rules('password','Password','required|trim');
if($this->form_validation->run())
{
$data = array(
'username' =>$this->input->post('username'),
'is_loggedin' => 1
);
$this->session->set_userdata($data);
redirect('staff/member');
}
else
{
$this->load->view("dashboard/login");
}
}
function member()
{
$row['content']=$this->load->view("dashboard/member",array(),true);
$this->load->view("dashboard/template", $row);
}
function validate_credentials()
{
if($this->staff_model->can_login())
{
return true;
}
else
{
$this->form_validation->set_message('validate_credentials','Incorrect Username or Password');
return false;
}
}
and my model function is
function can_login()
{
$this->db->where('DB_User_City',$this->input->post('city'));
$this->db->where('DB_User_Login',$this->input->post('username'));
$this->db->where('DB_User_Pass',$this->input->post('password'));
$query= $this->db->get('frp_db_user');
if($query->num_rows() == 1)
{
return true;
}
else
{
return false;
}
}
if user just click on submit button user should see a message and if user provide any single value incorrect then user must also see whats wrong with login so that user can provide correct information

Answer 1

inside your view for each fields you set validation blow its field or some where else
write like this codes to show your validation errors.
<div class="full_w">
<p>Food4U</p>
<?php echo validation_errors(); ?>
<?php echo form_open('staff/valid_login'); ?>
<label for="city">Select City</label>
<select name="city" class="text">
<option value="">Select City</option>
<?php echo $this->front_model->get_Fcities(); ?>
</select>
<br />
<?=form_error('city')?>
<br />
<label for="login">Username:</label>
<input id="login" name="username" class="text" />
<br />
<?=form_error('username')?>
<br />
<label for="pass">Password:</label>
<input id="pass" name="password" type="password" class="text" />
<br />
<?=form_error('password')?>
<br />
<div class="sep"></div>
<button type="submit" class="ok">Login</button>
<a class="button" href="">Change Password</a>
<?php echo form_close(); ?>
</form>
</div>

Answer 2

Your code seems like ok. Try this one
if($this->form_validation->run() == FALSE)
{
//redirect to your login form
}
else
{
//redirect to dashboard
}
please let me know if you face any problem.