Laravel 5.4 LengthAwarePaginator - laravel

Question

My brain suddenly crashed on this one. Anyone care to help me is highly appreciated.
This is LengthAwarepaginator in laravel 5.4
Here is the code.
$collection = [];
foreach ($maincategories->merchantCategory as $merchantCat) {
foreach ($merchantCat->merchantSubcategory as $merchantSub) {
foreach($merchantSub->products as $products){
$collection[] = $products;
}
}
}
$paginate = new LengthAwarePaginator($collection, count($collection), 10, 1, ['path'=>url('api/products')]);
dd($paginate);
It displays perfectly but the problem is the items is 100. That's all my items and I specify it correctly. I need to display only 10.
Base on LengthAwarePaginator constructor. Here is the reference.
public function __construct($items, $total, $perPage, $currentPage = null, array $options = [])
Here is the screen shot.
Where did I go wrong? TY

Answer 1

When manually creating a paginator, you have to slice the result set yourself. The first parameter to the paginator should be the desired page of results, not the entire result set.
From the pagination documentation:
When manually creating a paginator instance, you should manually "slice" the array of results you pass to the paginator. If you're unsure how to do this, check out the array_slice PHP function.
I would suggest using a Collection to help out with this a little:
// ...
$collection = collect($collection);
$page = 1;
$perPage = 10;
$paginate = new LengthAwarePaginator(
$collection->forPage($page, $perPage),
$collection->count(),
$perPage,
$page,
['path' => url('api/products')]
);

Answer 2

For the heavy select and to avoid any multiple select to calculate the total from the table we unable to use model paginate
use Illuminate\Pagination\LengthAwarePaginator;
in your controller function
if(!isset($input["total"])){ //initial request
$total = //Find the total only one time.
$request->request->add(['total' => $total]); //Add it in the request so that we can print it in blade
}else
$total = $input["total"]; //After initial request
$currentPage = LengthAwarePaginator::resolveCurrentPage(); //page variable from GET or POST
$perPage = 30; //Page Length
$offset = ($currentPage - 1) * $perPage; //find the offset to pass in query
$specificRecords = /*Collect specific page records in array
if mysql then Select * from table limit $perPage offset $offset
if ms sql then OFFSET {$offset} ROWS FETCH NEXT {$perPage} ROWS ONLY */
$records = new LengthAwarePaginator($specificRecords,$total,$perPage,Null,[ "path" => "/pagepath" ]);
in blade:
<center>{{$records->appends(Request::except([ 'page','_token' ]))->links()}}</center>
Check Page and total variable in page tags ensure you added page in except list :)