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php – How to use pagination with laravel DB::select query

Posted by: admin July 12, 2020 Leave a comment

Questions:

I am working on a project in Laravel and using DB facade to run raw queries of sql.
In my case I am using DB::select, problem is that pagination method is not working with this DB raw query and showing this error

Call to a member function paginate() on array

I just want how to implement laravel pagination with DB raw queries
here is my code:

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Notice;
use Illuminate\Support\Facades\DB;
use Illuminate\Pagination\Paginator;
use Illuminate\Pagination\LengthAwarePaginator;

class NoticeController extends Controller
{

public function index(){

    $notices = DB::select('select 
notices.id,notices.title,notices.body,notices.created_at,notices.updated_at,
    users.name,departments.department_name
    FROM notices
    INNER JOIN users ON notices.user_id = users.id
    INNER JOIN departments on users.dpt_id = departments.id
    ORDER BY users.id DESC')->paginate(20);

    $result = new Paginator($notices,2,1,[]);

    return view('welcome')->with('allNotices', $notices);
 }
}
How to&Answers:

Try:

$notices = DB::table('notices')
        ->join('users', 'notices.user_id', '=', 'users.id')
        ->join('departments', 'users.dpt_id', '=', 'departments.id')
        ->select('notices.id', 'notices.title', 'notices.body', 'notices.created_at', 'notices.updated_at', 'users.name', 'departments.department_name')
        ->paginate(20);

Answer:

public function index(Request $request){

$notices = DB::select('select notices.id,notices.title,notices.body,notices.created_at,notices.updated_at,
users.name,departments.department_name
FROM notices
INNER JOIN users ON notices.user_id = users.id
INNER JOIN departments on users.dpt_id = departments.id
ORDER BY users.id DESC');

$notices = $this->arrayPaginator($notices, $request);

return view('welcome')->with('allNotices', $notices);

}

public function arrayPaginator($array, $request)
{
    $page = Input::get('page', 1);
    $perPage = 10;
    $offset = ($page * $perPage) - $perPage;

    return new LengthAwarePaginator(array_slice($array, $offset, $perPage, true), count($array), $perPage, $page,
        ['path' => $request->url(), 'query' => $request->query()]);
}

Answer:

Don’t ever use the pagination logic on php-side!
Use limit and offset on your sql’s and leave the rest to the database server.
Additional use a seperate count-select for your statement.

Count:

$sql_count = 'SELECT count(1) cnt FROM ('. $sql . ') x';
$result = \DB::select( DB::raw($sql_count) );
$data['count'] = $result[0]->cnt;

Results:

$sql .= ' LIMIT ' . $offset . ', ' . $limit; 

$result = \DB::select( DB::raw($sql) );
$myPaginator = new \Illuminate\Pagination\LengthAwarePaginator($result, $data['count'], $limit, $page, ['path' => action('[email protected]')]);
$data['result'] = $result;

Answer:

This is suitable for me

$sql = "some sql code";

$page = 1;
$size = 10;
$data = DB::select($sql);
$collect = collect($data);

$paginationData = new LengthAwarePaginator(
                         $collect->forPage($page, $size),
                         $collect->count(), 
                         $size, 
                         $page
                       );