How to pass a value from view to model in Code Igniter - php

Question

I want to edit retrieved users that am stuck here is my code
I have a function in the model that selects all the users
public function retrieve() {
$this->db->select('*');
$query = $this->db->get('UserDetails');
return $query->result();
}
In the controller the queried data is passed to view
public function edit_user() {
$data['query']=$this->user_model->retrieve();
$this->layout->view('creation/update_user',$data);
}
Like this
<?php foreach($query as $row): ?>
<?php echo $row->username;?>
<?php echo $row->firstname;?></a>
<?php endforeach;?>
I want when one clicks on the username he should be able to edit the user.
How do i get the value of the clicked username that will be passed to the
$username
in the model (am aware CI is MVC, how can pass to controller then to model)
public function select_user_details() {
$this->db->select('*');
$this->db->where('username' $username);
$query=$this->db->get('users');
return $query->result();
}
In the controller for editing users
public function edit_user() {
$data['query']=$this->user_model->select_user_details();
$this->layout->view('creation/update_user',$data);
}
In the display
<? foreach($query as $row)
<input type="text" name="uname" value="<?php echo $row->username; ?>"/>
<input type="text" name="name" value="<?php echo $row->names; ?>"/>
<?php endforeach; ?>

Answer 1

You can add a parameter to the edit user method, and make a redirection in your controller. So, if there's no id specified, you get the list of all users, but if there is an id, you run a new model function (query with WHERE user_id = $id rather than $username) and load another view. Something like this:
public function edit_user($id = false) {
if ( !$id ) {
$data['query']=$this->user_model->retrieve();
$this->layout->view('creation/update_user',$data);
}
else {
$data['query']=$this->user_model->retrieve_one_user($id); // new model method for a single user
$this->layout->view('creation/edit_user',$data); // new view
}
}
And in your view, you need to make your username link go to .../edit_user/USER_ID_HERE.
You can also use different controller methods for that: like list_users() and edit_user($id). Also, you can do it in a single view. It's really up to you and what will work best for your app. There are million ways to do it.
To do it with the least amount of changes, just add a parameter to the select_user_details method (as well as the edit_user method in the controller):
public function select_user_details($username) {
...
public function edit_user($username) {
...
But again, make sure that the link from the user list would go to .../select_user_details/my_username_here. Like this:
<?php echo $row->username;?>

Answer 2

In View -
<?php foreach($query as $row): ?>
<?php echo $row->username;?>
<?php echo $row->firstname;?></a>
<?php endforeach;?>>
In Controller -
function edit_user($userName)
{
$data['query']=$this->user_model->retrieve($userName);
$this->layout->view('creation/update_user',$data);
}
In Model -
public function retrieve($userName) {
$this->db->select('*');
$query = $this->db->get('UserDetails');
return $query->result();
}