[eluser]Michael Wales[/eluser]
Live Tutorial: CodeIgniter Blog
At 1000 PST I will start "live-blogging" the development of a blog in CodeIgniter. Right now I am just aiming for basic functionality - user login, posting, and commenting. We may add in Categories if things go well, I don't know yet.
So, check out that post - and start refreshing around 1005 / 1010 when I get the first update out there.
[eluser]tucspl[/eluser]
awesome
[eluser]tucspl[/eluser]
ok, so are you working on it right now?
[eluser]Michael Wales[/eluser]
I ended the live tutorial a bit earlier than I had planned, but it's been a fast-paced hour and I think there is tons of information there for the beginner to soak up:
- MVC Concepts (minus the M)
- Basic User Validation
- Form Validation
- Active Record (get, getwhere, and insert)
- Passing Data from Controller to View
- Using Sessions
My Challenge to You:
Finish up the blog controller by writing the article() method, which should display a blog post in it's entirety.
Add the ability for non-logged in users to post comments. The basic concepts are already there with the posting ability, just modify it for commenting (don't forget the post_id field).
Closing Thoughts
I'm not sure if blogging is the right format for a Live Tutorial. It was an interesting test, but in the end I was focused on going as quickly as possible to keep new content hitting the page often.
I would definitely be willing to perform some live video tutorials via Kyte.tv, Skype, etc - is anyone interested in this?
[eluser]tucspl[/eluser]
quick question,
Parse error: parse error, unexpected ';', expecting T_FUNCTION in /home/chainrea/public_html/dev/infrastructure/application/controllers/user.php on line 91
I am not 100% positive what is causing this.
[eluser]Michael Wales[/eluser]
Are you copy-pasting the code or retyping. I have no errors... I'll repaste here, just to make sure yours is correct:
Code: // Check username/email for uniqueness
function _check_username($username) {
$email = $this->validation->email;
$query = $this->db->getwhere('users', array('username'=>$username), 1, 0);
if ($query->num_rows() != 0) {
$this->validation->set_message('_check_username', 'This username has already been registered');
return FALSE;
} else {
$query = $this->db->getwhere('users', array('email'=>$email), 1, 0);
if ($query->num_rows() != 0) {
$this->validation->set_message('_check_username', 'This email address has already been registered');
return FALSE;
}
}
return TRUE;
}
[eluser]tucspl[/eluser]
this is so wierd, i copied and pasted all of your code. I have another error:
Parse error: parse error, unexpected ';', expecting T_FUNCTION in /home/chainrea/public_html/dev/infrastructure/application/controllers/blog.php on line 54
[eluser]tucspl[/eluser]
This is my blog.php:
Code: <?php if (!defined('BASEPATH')) exit('No direct script access allowed');
class Blog extends Controller {
function Blog() {
parent::Controller();
}
// Our front page
function index() {
if ($this->session->userdata('logged_in')) {
$data['user']['logged_in'] = TRUE;
} else {
$data['user']['logged_in'] = FALSE;
}
$query = $this->db->get('posts');
foreach ($query->result() as $row) {
$data['posts'][$row->id]['title'] = $row->title;
}
$this->load->view('blog/front', $data);
}
// We're viewing a single blog post
function article() {
$this->load->view('blog/article');
}
// We're writing a post
function write() {
if ($this->session->userdata('logged_in') === FALSE) {
redirect('blog');
}
$this->load->library('validation');
$rules['title'] = 'trim|required|min_length[3]|max_length[255]';
$rules['body'] = 'trim|required';
$this->validation->set_rules($rules);
$fields['title'] = 'title';
$fields['body'] = 'body';
$this->validation->set_fields($fields);
if ($this->validation->run()) {
$this->load->helper('date');
$insert = array(
'title' => $this->input->post('title'),
'slug' => url_title($this->input->post('title')),
'author_id' => $this->session->userdata('logged_in'),
'body' => $this->input->post('body'),
'created_on' => now()
);
$this->db->insert('posts', $insert);
redirect('blog');
} else {
$this->load->view('blog/write');
}
}
?>
This is my user.php:
Code: <?php if (!defined('BASEPATH')) exit('No direct script access allowed');
class User extends Controller {
function Blog() {
parent::Controller();
}
// If logged in, send to front page
// If not logged in, send to login form
function index() {
}
// User Registration
function register() {
$this->load->library('validation');
$rules['username'] = 'trim|required|min_length[3]|max_length[20]|callback__check_username';
$rules['email'] = 'trim|required|valid_email|max_length[100]';
$rules['display_name'] = 'trim|required|min_length[3]|max_length[40]';
$rules['password'] = 'trim|required|min_length[3]|max_length[20]';
$rules['password_conf'] = 'trim|matches[password]';
$this->validation->set_rules($rules);
$fields['username'] = 'username';
$fields['email'] = 'email address';
$fields['display_name'] = 'display name';
$fields['password'] = 'password';
$fields['password_conf'] = 'password confirmation';
$this->validation->set_fields($fields);
if ($this->validation->run()) {
$this->load->helper('security');
$insert = array(
'username' => $this->input->post('username'),
'email' => $this->input->post('email'),
'display_name' => $this->input->post('display_name'),
'password' => dohash($this->input->post('password'))
);
$this->db->insert('users', $insert);
redirect('blog');
} else {
$this->load->view('user/register');
}
// User Login
function login() {
$this->load->library('validation');
$rules['username'] = 'trim|required|callback__check_login';
$rules['password'] = 'trim|required';
$this->validation->set_rules($rules);
$fields['username'] = 'username';
$fields['password'] = 'password';
$this->validation->set_fields($fields);
if ($this->validation->run()) {
$query = $this->db->getwhere('users', array('username' => $this->input->post('username')));
$row = $query->row();
$this->session->set_userdata('logged_in', $row->id);
redirect('blog');
} else {
$this->load->view('user/login');
}
}
// Check username/email for uniqueness
function _check_username($username) {
$email = $this->validation->email;
$query = $this->db->getwhere('users', array('username'=>$username), 1, 0);
if ($query->num_rows() != 0) {
$this->validation->set_message('_check_username', 'This username has already been registered');
return FALSE;
} else {
$query = $this->db->getwhere('users', array('email'=>$email), 1, 0);
if ($query->num_rows() != 0) {
$this->validation->set_message('_check_username', 'This email address has already been registered');
return FALSE;
}
}
return TRUE;
}
// Check the login information
function _check_login($username) {
$this->load->helper('security');
$password = dohash($this->validation->password);
$query = $this->db->getwhere('users', array('username'=>$username, 'password'=>$password), 1, 0);
if ($query->num_rows() == 0) {
$this->validation->set_message('_check_login', 'Invalid login');
return FALSE;
}
return TRUE;
}
}
?>
both errors they are going to consist of a "}".
[eluser]Michael Wales[/eluser]
Are you on PHP4 or PHP5?
[eluser]tucspl[/eluser]
php 5
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