摘要：在上一篇在外使用一中我們演示了如何引入以及基本使用，但是如果細(xì)心的朋友肯定會(huì)發(fā)現(xiàn)，當(dāng)你在使用來(lái)分頁(yè)的時(shí)候是會(huì)報(bào)錯(cuò)的。但是引入那個(gè)模塊同時(shí)它內(nèi)部依賴(lài)了的模塊，意味著為了一個(gè)分頁(yè)功能我們要裝好多東西。
在上一篇《在Laravel外使用Eloquent（一）》 中我們演示了如何引入Eloquent以及基本使用，但是如果細(xì)心的朋友肯定會(huì)發(fā)現(xiàn)，當(dāng)你在使用paginate(15)來(lái)分頁(yè)的時(shí)候是會(huì)報(bào)錯(cuò)的。因?yàn)槲覀儧](méi)有依賴(lài)laravel的pagination模塊。但是引入那個(gè)模塊同時(shí)它內(nèi)部依賴(lài)了symfony的http-foundation模塊，意味著為了一個(gè)分頁(yè)功能我們要裝好多東西。于是我就實(shí)現(xiàn)了一個(gè)比較簡(jiǎn)單的分頁(yè)類(lèi)：
代碼見(jiàn)：https://github.com/overtrue/rester
php
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*
* @author overtrue
* @github https://github.com/overtrue
* @url http://overtrue.me
* @date 2014-10-23T20:05:33
*/
use Closure;
use Countable;
use ArrayAccess;
use Serializable;
use ArrayIterator;
use JsonSerializable;
use IteratorAggregate;
class Paginator implements
ArrayAccess,
Countable,
IteratorAggregate,
Serializable,
JsonSerializable
{
protected $pager;
protected $pageSize;
protected $total;
protected $items;
/**
* Constructor
*
* @param string $pager
*/
public function __construct($pager = "page")
{
$this->pager = $pager;
}
/**
* Make a pagination
*
* @param array $items
* @param integer $total
* @param integer $pageSize
*
* @return array
*/
public function make($items, $total, $pageSize = 10)
{
$this->total = abs($total);
$this->pageSize = $pageSize;
$this->items = $items;
return $this;
}
/**
* Return current page
*
* @return integer
*/
public function getCurrentPage($total = null)
{
$page = abs(app()->request->get("page", 1));
if ($total) {
$this->total = $total;
}
$page >= 1 || $page = 1;
if ($this->items) {
$totalPage = $this->getTotalPage();
$page <= $totalPage || $page = $totalPage;
}
return $page;
}
/**
* Return total pages
*
* @return integer
*/
public function getTotalPage()
{
$this->pageSize > 0 || $this->pageSize = 10;
$totalPage = ceil($this->total / $this->pageSize);
$totalPage >= 1 || $totalPage = 1;
return $totalPage;
}
public function links()
{
$html = "";
}
/**
* getLink
*
* @param integer $page
*
* @return string
*/
public function getLink($page)
{
static $query;
if (is_null($query)) {
$query = app()->request->get();
}
$query["page"] = $page;
return "?" . http_build_query($query);
}
/** {@inhertDoc} */
public function jsonSerialize()
{
return $this->items;
}
/** {@inhertDoc} */
public function serialize()
{
return serialize($this->items);
}
/** {@inhertDoc} */
public function unserialize($data)
{
return $this->items = unserialize($data);
}
/** {@inhertDoc} **/
public function getIterator()
{
return new ArrayIterator($this->items);
}
/** {@inhertDoc} */
public function count($mode = COUNT_NORMAL)
{
return count($this->items, $mode);
}
/**
* Get a data by key
*
* @param string $key
*
* @return mixed
*/
public function __get($key) {
return $this[$key];
}
/**
* Assigns a value to the specified data
*
* @param string $key
* @param mixed $value
*
* @return void
*/
public function __set($key, $value)
{
$this->items[$key] = $value;
}
/**
* Whether or not an data exists by key
*
* @param string $key
*
* @return bool
*/
public function __isset($key)
{
return isset($this->items[$key]);
}
/**
* Unsets an data by key
*
* @param string $key
*/
public function __unset($key)
{
unset($this->items[$key]);
}
/**
* Assigns a value to the specified offset
*
* @param string $offset
* @param mixed $value
*
* @return void
*/
public function offsetSet($offset, $value)
{
$this->items[$offset] = $value;
}
/**
* Whether or not an offset exists
*
* @param string $offset
*
* @access public
*
* @return bool
*/
public function offsetExists($offset)
{
return isset($this->items[$offset]);
}
/**
* Unsets an offset
*
* @param string $offset
*
* @return array
*/
public function offsetUnset($offset)
{
if ($this->offsetExists($offset)) {
unset($this->items[$offset]);
}
}
/**
* Returns the value at specified offset
*
* @param string $offset
*
* @return mixed
*/
public function offsetGet($offset)
{
return $this->offsetExists($offset) ? array_get($this->items, $offset) : null;
}
}
```
然后在我們初始化eloquent的方裝載這個(gè)分頁(yè)類(lèi)到eloquent中就好：
```php
//...
use ResterPaginator;
// 注冊(cè)分頁(yè)類(lèi)
Capsule::setPaginator(function() use ($app, $config) {
return new Paginator($app->request, $config->get("pager", "page"));
});
//...
```
完整的eloquent初始化步驟請(qǐng)參考： https://github.com/overtrue/rester/blob/master/start/eloquent.php
然后我們就可以正常使用分頁(yè)功能了：
```php
$users = User::paginate(15);
$users = User::where("status", 1)->paginate(15);
...
```
因?yàn)樯厦娴姆猪?yè)類(lèi)實(shí)現(xiàn)了常用的[預(yù)定義接口](http://php.net/manual/zh/reserved.interfaces.php), 所以你可以很方便的使用分頁(yè)結(jié)果：
```php
// 遍歷
foreach ($users as $user) {
// do sth.
}
// json encode
$json = json_encode($users);
// count
$count = count($users);
//...
```
另外還考慮到了大家不一定全用它寫(xiě)接口用，所以分頁(yè)類(lèi)同樣實(shí)現(xiàn)了Laravel里的生成分頁(yè)鏈接的方法：`$users->links()`, 它會(huì)生成bootstrap格式的分頁(yè)列表：
```html
```
demo:
```php
name; ?>
links(); ?>
OK,那么現(xiàn)在你就可以很方便的在你的項(xiàng)目里無(wú)憂(yōu)的使用Eloquent啦。
原文： http://overtrue.me/2014/11/25/using-eloquent-outsite-laravel-2.html
上一篇：http://segmentfault.com/blog/overtrue/1190000002468218
文章版權(quán)歸作者所有，未經(jīng)允許請(qǐng)勿轉(zhuǎn)載,若此文章存在違規(guī)行為，您可以聯(lián)系管理員刪除。
轉(zhuǎn)載請(qǐng)注明本文地址：http://www.ezyhdfw.cn/yun/31907.html
