本文章是一个自己的对CI框架的学习笔记,用一个完整的搜索,查找并且实现分页的程序给大家参考参考.
举个按关键词搜索结果分页的例子.
视图HTML,代码如下:
- <div id="body">
- <form action="/index.php/search/index/" method="get">
- <p>请输入书名、作者、出版社中的一个或多个来查询。</p>
- <p><input type="text" name="s" value="" size="64" /> <input type="submit" value="搜索" /></p>
- </form>
- </div>
即表单提交到名叫search的controller和名叫index的方法,其中包含了一些动态参数,不是纯列表,故相对比较复杂,后面会提到,代码如下:
- public function index() {
- $keyword = $this->input->get ( 's' );
- $offset = $this->input->get ( 'offset' );
-
- if (emptyempty ( $offset )) {
- $offset = 0;
- }
-
- if (! emptyempty ( $keyword )) {
- $this->load->model ( 'book_model' );
- $this->load->library ( 'pagination' );
-
- $per_page = 10;
- $config ['num_links'] = 5;
- $config ['base_url'] = '/index.php/' . $this->router->class . '/' . $this->router->method . '/?s=' . $keyword;
- $config ['per_page'] = $per_page;
- $config ['total_rows'] = $this->Book_Model->find_by_name ( $keyword, NULL, NULL, true );
- $config ['page_query_string'] = false;
- $config ['query_string_segment'] = 'offset';
-
- $this->pagination->initialize ( $config );
- $data ['books'] = $this->Book_Model->find_by_name ( $keyword, $per_page, $offset );
- $this->load->view ( 'search', $data );
- } else {
- $this->load->view ( 'search' );
- }
- }
因为config.php中默认的enable_query_strings是false,起始位置始终在最后,这样出来的结果类似/index.php/search/index/?s=中国/10,页码取不到,需要将此配置改为false;
模型,代码如下:
- public function find_by_name($name, $per_page=0, $offset = 0, $is_total = false) {
- if ($is_total) {
- $query = $this->db->query ( "select count(id) as cnt from {$this->_book} where book_name like '%{$name}%'" );
- if ($query->num_rows () > 0) {
- $row = $query->row ();
- $ret = $row->cnt;
- }
- }else{
- $query = $this->db->query ("select * from {$this->_book} where book_name like '%{$name}%' limit {$offset}, {$per_page}");
- $ret = $query->result ();
- }
- return $ret;
- }
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