Laravel 5 - 手动分页

Posted 2023-02-16

【中文标题】Laravel 5 - 手动分页

【英文标题】：Laravel 5 - Manual pagination

【发布时间】：2015-01-28 13:50:18

【问题描述】：

Pagination::make() 方法在 Laravel 5 中的 Pagination 类中不再存在。

在 Laravel 5 中是否有使手动分页工作的解决方法？

【参考方案1】：

你需要添加使用：

use Illuminate\Pagination\LengthAwarePaginator as Paginator;

现在你可以使用了：

 $paginator = new Paginator($items, $count, $limit, $page, [
            'path'  => $this->request->url(),
            'query' => $this->request->query(),
        ]);

获取与模型对象分页格式相同的数据；

【讨论】：

只是说（Laravel doc）：When manually creating a paginator instance, you should manually "slice" the array of results you pass to the paginator.

能解释一下参数吗？

参数讨论过构造方法：laravel.com/api/5.0/Illuminate/Pagination/…

那么如何在刀片前端渲染页面呢？谢谢

【参考方案2】：

Illuminate\Pagination\LengthAwarePaginator 使用示例：

use Illuminate\Http\Request;
use Illuminate\Pagination\LengthAwarePaginator;

public function getItems(Request $request)

    $items = []; // get array/collection data from somewhere
    $paginator = $this->getPaginator($request, $items);

    // now we can treat $paginator as an array/collection
    return view('some-view')->with('items', $paginator);


private function getPaginator(Request $request, $items)

    $total = count($items); // total count of the set, this is necessary so the paginator will know the total pages to display
    $page = $request->page ?? 1; // get current page from the request, first page is null
    $perPage = 3; // how many items you want to display per page?
    $offset = ($page - 1) * $perPage; // get the offset, how many items need to be "skipped" on this page
    $items = array_slice($items, $offset, $perPage); // the array that we actually pass to the paginator is sliced

    return new LengthAwarePaginator($items, $total, $perPage, $page, [
        'path' => $request->url(),
        'query' => $request->query()
    ]);

然后在some-view.blade.php文件中，例如：

@foreach($items as $item)
    --  --
@endforeach


 $items->links() 

见https://laravel.com/docs/5.7/pagination#manually-creating-a-paginator

【讨论】：

我希望我能多次投票。这种示例应该添加到官方文档中。他们刚刚提到您可以手动创建分页，但没有显示如何。您的代码按预期工作，谢谢。

【参考方案3】：

你可以像这样创建手动分页

$data = DB::table('post')->skip(0)->take(20)->get();

【参考方案4】：

实例化这个类的好方法

 use Illuminate\Pagination\LengthAwarePaginator as Paginator;
 //...
 $paginator = new Paginator($items->forPage($page, $limit), $count, $limit, $page, [
            'path'  => Paginator::resolveCurrentPath()
        ]);

注意 items 必须是 Collection 对象。使用collect(Array()) 将Array 转换为Collection

More informations

【参考方案5】：

试试下面的代码手动分页

<?php

namespace App\Http\Controllers;

use Illuminate\Pagination\LengthAwarePaginator as Paginator;
// use Illuminate\Pagination\Paginator;
use Illuminate\Http\Request;
use App\Product;
class MyController extends Controller

    public function index(Request $request)
        $items = Product::all();

        $filter_products = []; // Manual filter or your array for pagination

        foreach($items as $item)
            if($item['id']>40 && $item['id']<50)
                array_push($filter_products, $item);
            
        

        $count = count($filter_products); // total product for pagination
        $page = $request->page; // current page for pagination

        // manually slice array of product to display on page
        $perPage = 5;
        $offset = ($page-1) * $perPage;
        $products = array_slice($filter_products, $offset, $perPage);

        // your pagination 
        $products = new Paginator($products, $count, $perPage, $page, ['path'  => $request->url(),'query' => $request->query(),]);
        // use  $products->appends($_GET)->links()  to dispaly your pagination
        return view('index',['products' => $products]);
    

【讨论】：

为您的答案添加一些解释。仅代码的答案并不是很有用。

【参考方案6】：

public function myData($userid)

    $data = static::get();


    $result = [];
    if(!empty($data))
        foreach ($data as $key => $value) 
            $result[$value->type.'-'.$value->postid][] = $value;
        
    


    $paginate = 10;
    $page = Input::get('page', 1);


    $offSet = ($page * $paginate) - $paginate;  
    $itemsForCurrentPage = array_slice($result, $offSet, $paginate, true);  
    $result = new \Illuminate\Pagination\LengthAwarePaginator($itemsForCurrentPage, count($result), $paginate, $page);
    $result = $result->toArray();
    return $result;

【参考方案7】：

基于@Avishay28，我认为不需要 php array_slice。

在 laravel 8 中工作。

我认为在性能方面这是一种更好的方法， 因为我们不是在查询“SELECT * FROM products”

$items_per_page = 5;
$page_id = (int)$request->query('page') ?? 1;
$model_docs_count = Product::count();
$total_pages = ceil($model_docs_count / $items_per_page);
$model = Product::skip(($page_id - 1) * $items_per_page)->limit($items_per_page)->latest();
// dd($model->toSql()); "SELECT * FROM `products` WHERE ORDER BY `created_at` DESC LIMIT 5 OFFSET 0"

$custom_paginate = new LengthAwarePaginator($model, $total_pages, $items_per_page, $page_id, [
    'path' => $request->url(),
    'query' => $request->query()
]);

return response()->json([$custom_paginate], 200);

【参考方案8】：

另一种使用分页的方式是这样的：

public function index()

    $posts = DB::table('posts')->paginate(15);