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怎么在Laravel中實(shí)現(xiàn)一個(gè)手動(dòng)分頁功能?相信很多沒有經(jīng)驗(yàn)的人對此束手無策,為此本文總結(jié)了問題出現(xiàn)的原因和解決方法,通過這篇文章希望你能解決這個(gè)問題。
#vendor/laravel/framework/src/Illuminate/Database/Eloquent/Builder.php:480 public 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' => $pageName, ]); }
從上面就可以看出,分頁的關(guān)鍵就在于LengthAwarePaginator。
LengthAwarePaginator的構(gòu)造方法。
public function __construct($items, $total, $perPage, $currentPage = null, array $options = []) { foreach ($options as $key => $value) { $this->{$key} = $value; } $this->total = $total; $this->perPage = $perPage; $this->lastPage = (int) ceil($total / $perPage); $this->path = $this->path != '/' ? rtrim($this->path, '/') : $this->path; $this->currentPage = $this->setCurrentPage($currentPage, $this->lastPage); $this->items = $items instanceof Collection ? $items : Collection::make($items); }
其實(shí)已經(jīng)很明白了,假如要分頁的數(shù)組為
[ ['username'=>'zhangsan', 'age'=>26], ['username'=>'lisi', 'age'=>23], ['username'=>'wangwu', 'age'=>62], ['username'=>'zhaoliu', 'age'=>46], ['username'=>'wangmazi', 'age'=>25], ['username'=>'lanzi', 'age'=>24], ['username'=>'pangzi', 'age'=>21], ]
共7條數(shù)據(jù),每頁顯示3條,共3頁
use Illuminate\Pagination\LengthAwarePaginator; use Illuminate\Pagination\Paginator; use Illuminate\Http\Request; # 僅做演示 # function userList(Request $request) { $users = [ ['username'=>'zhangsan', 'age'=>26], ['username'=>'lisi', 'age'=>23], ['username'=>'wangwu', 'age'=>62], ['username'=>'zhaoliu', 'age'=>46], ['username'=>'wangmazi', 'age'=>25], ['username'=>'lanzi', 'age'=>24], ['username'=>'pangzi', 'age'=>21] ]; $perPage = 3; if ($request->has('page')) { $current_page = $request->input('page'); $current_page = $current_page <= 0 ? 1 :$current_page; } else { $current_page = 1; } $item = array_slice($users, ($current_page-1)*$perPage, $perPage); //注釋1 $total = count($users); $paginator =new LengthAwarePaginator($item, $total, $perPage, $currentPage, [ 'path' => Paginator::resolveCurrentPath(), //注釋2 'pageName' => 'page', ]); $userlist = $paginator->toArray()['data']; return view('userlist', compact('userlist', 'paginator')); }
上面的代碼中的重點(diǎn)是$item,如果不做注釋1處理,得出的是所有7條數(shù)據(jù)。
注釋2處就是設(shè)定個(gè)要分頁的url地址。也可以手動(dòng)通過 $paginator ->setPath('路徑') 設(shè)置。
頁面中的分頁連接也是同樣的調(diào)用方式:
{{ $paginator->render() }}
好了,基本就是這樣,有紕漏的地方歡迎指正!
看看最終效果:
看完上述內(nèi)容,你們掌握怎么在Laravel中實(shí)現(xiàn)一個(gè)手動(dòng)分頁功能的方法了嗎?如果還想學(xué)到更多技能或想了解更多相關(guān)內(nèi)容,歡迎關(guān)注億速云行業(yè)資訊頻道,感謝各位的閱讀!
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