codeigniter CRUD sample

From: Blaze!

class Admin extends Controller {

  function Admin()
  {
    parent::Controller();

    $this->load->library('administration');

    $this->template['module'] = 'page';
    $this->template['admin']    = true;

    $this->load->model($this->template['module'], 'page_model', 'pages', true);

    $this->page_id = ( $this->uri->segment(4) ) ? $this->uri->segment(4) : NULL;
  }

  function index()
  {
    $this->template['pages'] = $this->pages->list_pages();

    $this->layout->load($this->template, 'index');
  }

  function create() {
    if ( $post = $this->input->post('submit') ) {
      $data = array(
      'title'         => $this->input->post('title'),
      'menu_title'    => $this->input->post('menu_title'),
      'uri'           => $this->input->post('parent').$this->input->post('uri'),
      'meta_keywords' => $this->input->post('meta_keywords'),
      'meta_description' => $this->input->post('meta_description'),
      'body'          => $this->input->post('body'),
      'active'        => $this->input->post('status')
      );

      $this->db->insert('module_pages', $data);
      $id = $this->db->insert_id();

      $this->session->set_flashdata('notification', 'Page "'.$this->input->post("title").'" has been created, continue editing here');

      redirect('admin/page/edit/'.$id);
    }  else {
      $this->layout->load($this->template, 'create');
    }
  }

  function edit()
  {
    if ( $post = $this->input->post('submit') )
    {
      $data = array(
      'title'       => $this->input->post('title'),
      'menu_title'    => $this->input->post('menu_title'),
      'uri'       => $this->input->post('parent').$this->input->post('uri'),
      'meta_keywords'   => $this->input->post('meta_keywords'),
      'meta_description'  => $this->input->post('meta_description'),
      'body'        => $this->input->post('body'),
      'active'      => $this->input->post('status')
      );

      $this->db->where('id', $this->input->post('id'));
      $this->db->update('module_pages', $data);

      $this->session->set_flashdata('notification', 'Page "'.$this->input->post("title").'" has been saved ...');

      redirect('admin/page/edit/'.$this->input->post('id'));
    }

    $this->template['pages'] = $this->pages->list_pages();

    $this->template['page'] = $this->pages->get_page( array('id' => $this->page_id) );
    $this->layout->load($this->template, 'edit');
  }

  function delete()
  {
    if ( $post = $this->input->post('submit') )
    {
      $this->db->where('id', $this->input->post('id'));
      $query = $this->db->delete('module_pages');

      $this->session->set_flashdata('notification', 'Page has been deleted.');

      redirect('admin/page');
    }
    else
    {
      $this->template['page'] = $this->pages->get_page( array('id' => $this->page_id) );

      $this->layout->load($this->template, 'delete');
    }
  }

}

CodeIgniter – Active Record Class

http://codeigniter.com/user_guide/database/active_record.html#insert