cakephp中的datasources
cakephp中的数据源其实是个好东西,假如你有多种形式的数据源,比如REST,RSS,JSON等,你可以编写cakephp的插件,去读取这些数据源.本文以编写一个读取RSS格式数据源
的做例子,讲解其使用.
代码在http://www.loadsys.com/files/rss_source.zip中可以下载,
把解压的代码放在/app/models/datasources 下,并设置
app/config/database.php如下
var $codeforestNews = array(
'datasource' => 'rss',
'feedUrl' => 'http://feeds.feedburner.com/codeforest',
'encoding' => 'UTF-8',
'cacheTime' => '+1 day',
);
接着,创建
/app/models/codeforest_news.php
class CodeforestNews extends AppModel {
var $useTable = false;
var $useDbConfig = 'codeforestNews';
}
这里说明了,不使用数据库中的表,而直接使用datasource作为数据源
再看控制层:
class NewsController extends AppController {
var $name = 'News';
var $uses = array('CodeforestNews');
function index() {
$this->paginate = array(
'limit' => 10,
'order' => array(
'CodeforestNews.pubDate' => 'desc',
),
);
$this->set('news',$this->paginate('CodeforestNews') );
}
}
可以看到，甚至是可以排序的.
在页面中:
<?php foreach( $news as $newsItem ) : ?>
<?php echo $html->link($newsItem['CodeforestNews']['title'], $newsItem['CodeforestNews']['link']); ?><br/>
<em><?php echo $newsItem['CodeforestNews']['pubDate']; ?></em>
<hr>
<?php endforeach; ?>
<div class="paging">
<?php echo $paginator->prev('<< '.__('previous', true), array(), null, array('class'=>'disabled'));?>
| <?php echo $paginator->numbers();?>
<?php echo $paginator->next(__('next', true).' >>', array(), null, array('class'=>'disabled'));?>
</div>
DEMO效果为:
http://www.codeforest.net/demo/cake_data_sources/news/index/page:2
查看CAKEPHP手册,可以知道,要写datasources,实现如下方法之一即可:
create($model, $fields = array(), $values = array())
read($model, $queryData = array())
update($model, $fields = array(), $values = array())
delete($model, $id = null)
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