Laravel Pagination only shows the first page's content - php

Question

I am writing an api to get an object array by returning a paginated object. The problem is that accessing first page of the paginate object works fine but second and next pages just only return the first page contents. I just called the URLs like this:
/api/get?page=1
/api/get?page=2
Data going in:
{
"page_id":116,
"descending":true,
"rowsPerPage":10,
"page":1,
"search":null,
"sortBy":"name",
"tag_id":null,
"start_date":null,
"end_date":null,
"from_mobile":true
}
Below is my code:
function get_list(Request $req)
{
$orderby = "id";
$order = "DESC";
$flowdb = Flow::leftjoin("flow_tags", "flow.id", "=", "flow_tags.flow_id");
$flowdb->leftjoin("tags", "tags.id", "=", "flow_tags.tag_id");
$flowdb->leftjoin("flow_stocks", "flow.id", "=", "flow_stocks.flow_id");
$flowdb->select(DB::Raw("flow.id,flow.name,flow.used_count,flow.payload,GROUP_CONCAT(CONCAT('\"','[',tags.id,',', tags.name,']','\"')) as tags, count(flow_stocks.stock_id) as stock_count"));
$flowdb->where("flow.active", ">", 0);
$flowdb->where("flow.page_id", $req->page_id);
$flowdb->groupBy("flow.id");
if($req->from_mobile)
{
$flowdb->where('flow.from_mobile',true);
}
if ($req->sortBy) {
$orderby = $req->sortBy;
}
$order = $req->descending ? 'DESC' : 'ASC';
$flowdb->orderBy($orderby, $order);
$flowdb->orderBy("flow_tags.id", "ASC");
if ($req->rowsPerPage && $req->rowsPerPage !== -1) {
$flows = $flowdb->paginate($req->rowsPerPage);
} else {
$flows = $flowdb->paginate(999999999);
}
return $flows;
}
I also tried laravel manual paginator but the error didn't solve.
public function paginator(Request $request, $object, $perPage)
{
$currentPage = LengthAwarePaginator::resolveCurrentPage()??1;
$currentItems = array_slice($object, $perPage * ($currentPage - 1), $perPage);
$paginatedItems = new LengthAwarePaginator($currentItems, count($object), $perPage, $currentPage);
$paginatedItems->setPath($request->url());
return $paginatedItems;
}

Answer 1

Take a look at this method. The parameter $perPage is how many results you wish to show per page.
/**
* Paginate the given query.
*
* #param int|null $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,
]);
}
This means something is wrong with setting up the requirements for this condition:
$req->rowsPerPage && $req->rowsPerPage !== -1
Double check your queries by using dd($query)
I think it would be easier to retrieve the whole dataset as is, without setting condition flow.page_id, $req->page_id I think the culprit is somewhere there, but it's difficult to verify without having the data for it.
Finally have you tried calling to ->get() before $req->rowsPerPage && $req->rowsPerPage !== -1:
$flowdb->get();
not sure if it would help. But I've seen instances where it was required. Can't think of any examples though.

Answer 2

I managed to find out the solution. The problem is I accidentally put page = 1 in the request parameter that laravel paginate used this page value (in this case 1) to render results for all pages. I read some online articles about this and found out that laravel starts rendering from page 1 by default if the user didn't give specific page value in the request. So, I didn't really need that page parameter in this case.

Answer 3

In case any one having the same issue using the http client, suppose the url is as bellow:
$url = 'http://127.0.0.1:8002/api/trips?page=3';
just dd the response to see which path was actually requested to the server
dd(Http::get($url)->effectiveUri())
It look something like this:
GuzzleHttp\Psr7\Uri {#2021 ▼
-scheme: "http"
-userInfo: ""
-host: "127.0.0.1"
-port: 8002
-path: "/api/trips"
-query: "page=3"
-fragment: ""
}
there you can confirm in the query field that the page number is what you intended.