Laravel - Calculate minimum value from multiple fields in controller - laravel

Question

I want to calculate the minimum value from a collection of form fields.
I have one-to-many relationship, where one shop can have many items ans that is working fine without any errors.
My form
<form action="{{ route('form_submit') }}" method="post">
#csrf
<h3>Item 1</h3>
<input type="text" name="item[]">
<input type="text" name="price[]">
//Like this I can add many fields
<input type="submit">
</form>
Controller
public function store(Request $request, $id){
$shop = Shop::findorfail($id);
$item = Item::where('shop_id', $shop->id)->get(); //working fine
$i=0;
$price = request('price')
foreach( $items as $item)
$item->price = request('price')[$i];
$i++;
//I tried
$price_group = collect($item->price)->where('shop_id', $shop->id);
$min_price = min($price_group);
$item->save();
}
Route
Route::post('/{id}', 'Controller#store')->name('form_submit');
But it does not calculate the minimum price. When I dd($min_price), its total blank. What am I missing here?

Answer 1

I think is just...
$items = Item::where('shop_id', $shop->id)->get();
$min = $items->min('price');
And take a look on eager loading for relations. It's much better.

Answer 2

I solved this by #Jonas's solution. And I make this my answer.
Controller
public function store(Request $request, $id){
$shop = Shop::findorfail($id);
$item = Item::where('shop_id', $shop->id)->get(); //working fine
$i=0;
$price = request('price')
foreach( $items as $item)
$item->price = request('price')[$i];
$i++;
//This works
$min_price = min(request('price'));
$item->save();
}