Posts tagged with: framework

CodeIgniter: Paginação mais coerente com sistema de busca

Depois de longa pausa, cá estou. Bom, existem alguns tutoriais e artigos por aí, inclusive no wiki do CodeIgniter explicando como usar uma paginação mais coerente. Digo isso pois a paginação atual do CI trabalha com o offset do SQL, e não com o número da página em si. O código que uso hoje foi retirado do wiki, já o sistema de busca integrado eu mesmo desenvolvi pois não achei nada no wiki.Bom, vamos às modificações:

Primeiro, no arquivo original temos a funcao create_links(). Agora ela terá um arqumento “$search”, que será passado após o numero de paginas, por exemplo http://www.site.com.br/produtos/pagina/2/notebook-sony. Alterei toda a identação da classe de Paginação, não consigo trabalhar com o estilo de Allman (mais info: wikipedia). Analisando o código inteiro, não preciso me prolongar muito, eu simplesmente adicionei um parâmetro na função de criar links, para concatenar o resultado da busca nos links das páginas.

Pagination.php:

[cc lang=”php”]
‘;
var $cur_tag_close = ‘‘;
var $next_tag_open = ‘ ‘;
var $next_tag_close = ‘ ‘;
var $prev_tag_open = ‘ ‘;
var $prev_tag_close = ”;
var $num_tag_open = ‘ ‘;
var $num_tag_close = ”;
var $page_query_string = FALSE;
var $query_string_segment = ‘per_page’;

/**
* Constructor
*
* @access public
* @param array initialization parameters
*/
function CI_Pagination($params = array())
{
if (count($params) > 0)
{
$this->initialize($params);
}

log_message(‘debug’, “Pagination Class Initialized”);
}

// ——————————————————————–

/**
* Initialize Preferences
*
* @access public
* @param array initialization parameters
* @return void
*/
function initialize($params = array())
{
if (count($params) > 0)
{
foreach ($params as $key => $val)
{
if (isset($this->$key))
{
$this->$key = $val;
}
}
}
}

// ——————————————————————–

/**
* Generate the pagination links
*
* @access public
* @return string
*/
function create_links($search=”) {

if ($search!=”) $search = ‘/’.$search;

// If our item count or per-page total is zero there is no need to continue.
if ($this->total_rows == 0 OR $this->per_page == 0) {
return ”;
}

// Calculate the total number of pages
$num_pages = ceil($this->total_rows / $this->per_page);
// Is there only one page? Hm… nothing more to do here then.
if ($num_pages == 1) {
return ”;
}

// Determine the current page number.
$CI =& get_instance();

if ($CI->config->item(‘enable_query_strings’) === TRUE OR $this->page_query_string === TRUE){
if ($CI->input->get($this->query_string_segment) != 0){
$this->cur_page = $CI->input->get($this->query_string_segment);
// Prep the current page – no funny business!
$this->cur_page = (int) $this->cur_page;
}
} else {
if ($CI->uri->segment($this->uri_segment) != 0) {
$this->cur_page = $CI->uri->segment($this->uri_segment);
// Prep the current page – no funny business!
$this->cur_page = (int) $this->cur_page;
}
}

if ( ! is_numeric($this->cur_page)) {
$this->cur_page = 0;
}

if ($this->cur_page==0) {
$this->cur_page = 1;
}

// Is the page number beyond the result range?
// If so we show the last page
if ($this->cur_page > $this->total_rows) {
$this->cur_page = ($num_pages – 1) * $this->per_page;
}

$uri_page_number = $this->cur_page;

// Calculate the start and end numbers. These determine
// which number to start and end the digit links with
$start = (($this->cur_page – $this->num_links) > 0) ? $this->cur_page – ($this->num_links – 1) : 1;
$end = (($this->cur_page + $this->num_links) < $num_pages) ? $this->cur_page + $this->num_links : $num_pages;

// Is pagination being used over GET or POST? If get, add a per_page query
// string. If post, add a trailing slash to the base URL if needed
if ($CI->config->item(‘enable_query_strings’) === TRUE OR $this->page_query_string === TRUE) {
$this->base_url = rtrim($this->base_url).’&’.$this->query_string_segment.’=’;
} else {
$this->base_url = rtrim($this->base_url, ‘/’) .’/’;
}

// And herwe go…
$output = ”;

// Render the “First” link
if ($this->cur_page > $this->num_links) {
$output .= $this->first_tag_open.’base_url.$i.$search.'”>’.$this->prev_link.’‘.$this->prev_tag_close;
}

// Write the digit links
for ($loop = $start -1; $loop <= $end; $loop++) { $i = ($loop * $this->per_page) – $this->per_page;
if ($i >= 0) {
if ($this->cur_page == $loop) {
$output .= $this->cur_tag_open.$loop.$this->cur_tag_close; // Current page
} else {
$n = ($i == 0) ? ‘1’ : $loop;
$output .= $this->num_tag_open.’base_url.($this->cur_page + 1).$search.'”>’.$this->next_link.’‘.$this->next_tag_close;
}

// Render the “Last” link
if (($this->cur_page + $this->num_links) < $num_pages) { $i = $num_pages; $output .= $this->last_tag_open.’Did you like this? Share it:


May 29, 2008    |       19 comments

Fixing CodeIgniter and .htaccess issues on Leopard

Hello

This is my first post and I’ll try to show you guys a few configurations regarding CodeIgniter with Leopard. First I was having problems with .htaccess and mode_rewrite, to remove de “index.php”. Searching CodeIgniter forums, many many people had same problem, 500 Internal Erros, 403 Forbidden and so on. I was almost givin up, when I tried working with Virtual Hosts on apache, witch is the best and the correct solution in my case, because I develop many sites. Well, just for the record, I’m not using pack solutions, like apachefriends.org, just de built-in apache+php5, and installed mysql.

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