filter eloquent models in laravel - laravel

Question

I have different filters for every category in my blade. when l click on every filter, page URL changes and filter name and filter value shows in URL, like this:
127.0.0.1:8000/categories/search/9?brand[1]=Samsung&brand[2]=Sony&system=android
As you see,every filter can be string or array.
How can I get every filter name in my controller and filter products based on filter name and filter value?
I wrote this conditions ,but these conditions only work if filters that are string, and I don't know how can I write conditions for array filters. This is my controller:
<?php
namespace App\Http\Controllers;
use App\Category;
use App\Filter;
use App\product;
use App\ProductQa;
use Illuminate\Http\Request;
class CategoryController extends Controller
{
public function index(Request $request)
{
$q = product::query();
if ($request->has('brand')) {
$q->where('brand', '=', $request->get('brand'));
}
if ($request->has('system')) {
$q->where('system', '=', $request->get('system'));
}
return $q;
}
}

Answer 1

First define set of filter parameters with their column names, if the filter is array then apply whereIn function else apply where function
public function index(Request $request)
{
$q = product::query();
// ['columnName'=>'GetParamName']
$filters = ['brand'=>'brand','system'=>'system'];
foreach($filters as $column => $key){
if ($request->has($key)) {
$filterVal = $request->input($key)
if(is_array($filterVal)){
$q->whereIn($column, $filterVal);
}else{
$q->where($column,'=', $filterVal);
}
}
}
return $q;
}

Answer 2

As mentioned in the comments you can use whereIn to search with an array of data.
public function index(Request $request)
{
$q = product::query();
if ($request->has('brand')) {
$q->whereIn('brand', (array) $request->input('brand'));
}
if ($request->has('system')) {
$q->whereIn('system', (array) $request->input('system'));
}
...
return $q->get();
}
Casting the input to array, (array), allows us to use only whereIn. If it is already an array you are good and if it is a string it is now in an array. You can also check for an array or a string and use where or whereIn accordingly.