<span class="token scope"><span class="token punctuation"><span class="token function">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:</span></span></span>
<code class="hljs php has-numbering"><span class="hljs-comment">#vendor/laravel/framework/src/Illuminate/Database/Eloquent/Builder.php:480<span class="hljs-keyword">public <span class="hljs-function"><span class="hljs-keyword">function <span class="hljs-title">paginate<span class="hljs-params">(<span class="hljs-variable">$perPage = null, <span class="hljs-variable">$columns = [<span class="hljs-string">'*'], <span class="hljs-variable">$pageName = <span class="hljs-string">'page', <span class="hljs-variable">$page = null) {<span class="hljs-variable">$query = <span class="hljs-variable">$this->toBase();<span class="hljs-variable">$total = <span class="hljs-variable">$query->getCountForPagination();<span class="hljs-variable">$this->forPage(<span class="hljs-variable">$page = <span class="hljs-variable">$page ?: Paginator::resolveCurrentPage(<span class="hljs-variable">$pageName),<span class="hljs-variable">$perPage = <span class="hljs-variable">$perPage ?: <span class="hljs-variable">$this->model->getPerPage() );<span class="hljs-keyword">return <span class="hljs-keyword">new LengthAwarePaginator(<span class="hljs-variable">$this->get(<span class="hljs-variable">$columns), <span class="hljs-variable">$total, <span class="hljs-variable">$perPage, <span class="hljs-variable">$page, [<span class="hljs-string">'path' => Paginator::resolveCurrentPath(),<span class="hljs-string">'pageName' => <span class="hljs-variable">$pageName, ]); }<br/>我们发现这个关键就是用了lengthAwarePaginator.<br/> LengthAwarePaginator的构造方法,如下:<br/></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></code>
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]) }
Le focus du code ci-dessus est $item. Si le commentaire 1 n'est pas traité, le résultat. est-ce que ce sont les 7 éléments de données.
La note 2 consiste à définir une adresse URL à paginer. Il peut également être défini manuellement via $paginator ->setPath('path').
La connexion de pagination dans la page est également appelée de la même manière {{ $paginator->render() }}
Remarque : Le format des données renvoyées est à peu près le suivant :
"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 }
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