基于Laravel5.5 在项目实施过程中,需要对从接口中获取的数据(或者通过搜索工具查询出来的数据)进行分页
一、创建手动分页
在laravel自带的分页中,一般是通过数据库查询访问paginate()方法来达到分页的效果 ,like this:
class IndexControllerextends Controller
{ publicfunctionindex() { $person = DB::table('person')->paginate(15); return view('index.pagTest',['person'=> $person]); } }
查看框架的分页源代码
#vender/laravel/framework/src/Illuminate/Database/Eloquent/Builder.php
/** * Paginate the given query. * * @param int $perPage * @param array $columns * @param string $pageName * @param int|null $page * @return \Illuminate\Contracts\Pagination\LengthAwarePaginator * * @throws \InvalidArgumentException */ public function paginate($perPage = null, $columns = ['*'], $pageName = 'page', $page = null) { $page = $page ?: Paginator::resolveCurrentPage($pageName); $perPage = $perPage ?: $this->model->getPerPage(); $results = ($total = $this->toBase()->getCountForPagination()) ? $this->forPage($page, $perPage)->get($columns) : $this->model->newCollection(); return $this->paginator($results, $total, $perPage, $page, [ 'path' => Paginator::resolveCurrentPath(), 'pageName' => $pageName, ]); }
发现,分页用了 \Illuminate\Contracts\Pagination\LengthAwarePaginator 构造方法,查看这个构造方法
<?php namespace Illuminate\Pagination; use Countable; use ArrayAccess; use JsonSerializable; use IteratorAggregate; use Illuminate\Support\Collection; use Illuminate\Support\HtmlString; use Illuminate\Contracts\Support\Jsonable; use Illuminate\Contracts\Support\Arrayable; use Illuminate\Contracts\Pagination\LengthAwarePaginator as LengthAwarePaginatorContract; class LengthAwarePaginator extends AbstractPaginator implements Arrayable, ArrayAccess, Countable, IteratorAggregate, JsonSerializable, Jsonable, LengthAwarePaginatorContract { /** * The total number of items before slicing. * * @var int */ protected $total; /** * The last available page. * * @var int */ protected $lastPage; /** * Create a new paginator instance. * * @param mixed $items * @param int $total * @param int $perPage * @param int|null $currentPage * @param array $options (path, query, fragment, pageName) * @return void */ public function __construct($items, $total, $perPage, $currentPage = null, array $options = []) { foreach ($options as $key => $value) { $this->{$key} = $value; } $this->total = $total; $this->perPage = $perPage; $this->lastPage = max((int) ceil($total / $perPage), 1); $this->path = $this->path !== '/' ? rtrim($this->path, '/') : $this->path; $this->currentPage = $this->setCurrentPage($currentPage, $this->pageName); $this->items = $items instanceof Collection ? $items : Collection::make($items); }
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