分页是在网页上是很常用的，基本上每个网页都有。首先我们看下laravel得分页方法源码：
#vendor/laravel/framework/src/illuminate/database/eloquent/builder.php:480public function paginate($perpage = null, $columns = ['*'], $pagename = 'page', $page = null)
{$query = $this->tobase();$total = $query->getcountforpagination();$this->forpage($page = $page ?: paginator::resolvecurrentpage($pagename),$perpage = $perpage ?: $this->model->getperpage()
);return new lengthawarepaginator($this->get($columns), $total, $perpage, $page, ['path' => paginator::resolvecurrentpath(),'pagename' => $pagename,
]);
}
我们发现这个关键就是用了lengthawarepaginator.
lengthawarepaginator的构造方法,如下：
假定分页得数组为：
[
{
"id": 9,
"sys_id": 1,
"org_id": 2,
"user_id": 8,
"papaer_id": 26,
},
{
"id": 5,
"sys_id": 1,
"org_id": 2,
"user_id": 8,
"papaer_id": 26,
},
{
"id": 1,
"sys_id": 1,
"org_id": 2,
"user_id": 8,
"papaer_id": 26,
}
]
这里一共3条数据，我们设定每页显示1个，一共3页。
分页调用
use illuminate\pagination\lengthawarepaginator;
use illuminate\pagination\paginator;
public function show(request $request){
$perpage = 1; //每页显示数量
if ($request->has('page')) {
$current_page = $request->input('page');
$current_page = $current_page <= 0 ? 1 :$current_page;
} else {
$current_page = 1;
}
$item = array_slice($real, ($current_page-1)*$perpage, $perpage); //注释1
$total = count($real);
$paginator =new lengthawarepaginator($item, $total, $perpage, $current_page, [
'path' => paginator::resolvecurrentpath(), //注释2
'pagename' => 'page',
]);
return response()->json(['result'=>$paginator])
}
上面的代码中的重点是$item，如果不做注释1处理，得出的是所有7条数据。
注释2处就是设定个要分页的url地址。也可以手动通过 $paginator ->setpath(‘路径’) 设置。
页面中的分页连接也是同样的调用方式 {{ $paginator->render() }}
注：返回得数据格式大概如下所示：
"result": {
"current_page": 3,
"data": [
{
"id": 5,
"sys_id": 1,
"org_id": 2,
"user_id": 8,
"papaer_id": 26
}
],
"from": null,
"last_page": 2,
"next_page_url": null,
"path": "http://www.text.tld/examination/show",
"per_page": 2,
"prev_page_url": "http://www.text.tld/examination/show?page=2",
"to": null,
"total": 3
}
以上就是laravel的分页问题实例的详细内容。