Updating table with multiple rows - mysql

Question

How can I update multiple rows at the same time by their report_id? My Inventory table looks like this:
| id | report_id | product_id | shelf_quantity | display_quantity |
|----|-----------|------------|----------------|------------------|
| 1 | 2 | 12 | 1 | 5 |
| 2 | 2 | 13 | 2 | 6 |
| 3 | 2 | 14 | 3 | 23 |
My attempt to solve the problem:
My controller:
function update($id, Request $request) {
$report = Report::find($id);
$inputs = $request->input('display');
$report->user_id = $user_id;
$report->save();
//Updating inventory table
$inventory = Inventory::where('report_id', $report->id)->get();
foreach($inputs as $key => $value) {
$inventory->display = $request->input('display')[$key] ?: 0;
$inventory->storage = $request->input('storage')[$key] ?: 0;
$inventory->save();
}
My web route:
Route::put('/reports/{id}', 'ReportController#update');
The problem here is that it is only saving the last value that I input.
Additional information
I'm also using the same code in storing new rows and it's working fine. Please see code below:
public function store(Request $request) {
//Adding inventory table
$new_inventories = new Inventory();
foreach($inputs as $key => $value) {
$data[] = [
'user_id' => $user_id,
'report_id' => $new_report->id,
'display' => $request->input('display')[$key] ?: 0,
'storage' => $request->input('storage')[$key] ?: 0,
'product_id' => $request->product_id[$key],
'created_at' => $now,
'updated_at' => $now,
// 'remark' => $request->remark[$key] ?? null,
];
}
Inventory::insert($data);
//End of inventory table
}
Any form of help would be appreciated. Thank you!
EDIT:
My form looks like this:
<form action="/reports/{{$report->id}}" method="post">
#csrf
{{method_field('PUT')}}
#foreach($products as $product)
<input type="number" name="product_id[]" value="{{ $product->id}}" hidden>
<input type="number" name="storage[]">
<input type="number" name="display[]">
#endforeach
</form>

Answer 1

You cannot update multiple rows in one shot. In this case the best way is to get one by one the items in inventory and update them. So you loop through $request->input('product_id'), get the Inventory model for that product_id and $report->id, update and save.
for($i=0; $i<count($request->input('product_id');$i++) {
$inventory = Inventory::where('report_id', $report->id)->where('product_id', $request->input('product_id')[$i])->first();
$inventory->display = $inventory->display = $request->input('display')[$i];
$inventory->storage = $inventory->storage = $request->input('storage')[$i];
$inventory->save();
}