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:

1. <div >
2. <form action="/index.php/search/index/" method="get">
3. <p>请输入书名、作者、出版社中的一个或多个来查询。</p>
4. <p><input type="text" name="s" value="" size="64" /> <input type="submit" value="搜索" /></p>
5. </form>
6. </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:

1. public function index() {
2. $keyword = $this->input->get ( 's' );
3. $offset = $this->input->get ( 'offset' );
4. if (emptyempty ( $offset )) {
5. $offset = 0;
6. }
7. if (! emptyempty ( $keyword )) {
8. $this->load->model ( 'book_model' );
9. $this->load->library ( 'pagination' );
10. $per_page = 10;
11. $config ['num_links'] = 5;
12. $config ['base_url'] = '/index.php/' . $this->router->class . '/' . $this->router->method . '/?s=' . $keyword;
13. $config ['per_page'] = $per_page;
14. $config ['total_rows'] = $this->Book_Model->find_by_name ( $keyword, NULL, NULL, true );
15. $config ['page_query_string'] = false;
16. $config ['query_string_segment'] = 'offset'; //重新定义记录起始位置的参数名，默认为per_page
17. $this->pagination->initialize ( $config );
18. $data ['books'] = $this->Book_Model->find_by_name ( $keyword, $per_page, $offset );
19. $this->load->view ( 'search', $data );
20. } else {
21. $this->load->view ( 'search' );
22. }
23. }

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:

1. public function find_by_name($name, $per_page=0, $offset = 0, $is_total = false) {
2. if ($is_total) {//总数
3. $query = $this->db->query ( "select count(id) as cnt from {$this->_book} where book_name like '%{$name}%'" );
4. if ($query->num_rows () > 0) {
5. $row = $query->row ();
6. $ret = $row->cnt;
7. }
8. }else{//列表
9. $query = $this->db->query ("select * from {$this->_book} where book_name like '%{$name}%' limit {$offset}, {$per_page}");
10. $ret = $query->result ();
11. }
12. return $ret;
13. }