laravel validatetor in controller seems not working - laravel

Question

The validate() function from my sales controller seems not working, I am comparing it to my other controller, it looks like it should work but it is not. it looks like the validate() is being bypassed. here's my controller
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Session;
class SalesController extends Controller
{
public function store(Request $request)
{
$this->validate($request, [
'user_id' => 'required',
'status_id' => 'required',
'currency_id' => 'required',
'company_id' => 'required',
'invoice_no' => 'nullable',
'notes' => 'nullable',
'admin_notes' => 'nullable',
'due_date' => 'nullable',
'publish' => 'nullable',
'product_id' => 'required|min:1',
'product_code' => 'required|min:1',
'product_name' => 'required|min:1',
'quantity' => 'required'
]);
$sales = $request->only(
'user_id',
'status_id',
'currency_id',
'currency_rate',
'due_date',
'company_id',
'invoice_no',
'notes',
'admin_notes',
'delivery_date',
'publish'
);
$sales['grandtotal'] = (float) str_replace(',', '', $request->grandtotal);
$sales['grandtotalcost'] = (float) str_replace(',', '', $request->grandtotalcost);
$sales = Sales::create($sales);
$input = $request->all();
for($i=0; $i<= count($input['quantity']); $i++) {
if(empty($input['quantity'][$i]) || !is_numeric($input['quantity'][$i])) continue;
$items = [
'sales_id' => $sales->id,
'product_id' => $input['product_id'][$i],
'product_code' => $input['product_code'][$i],
'product_name' => $input['product_name'][$i],
'price' => $input['price'][$i],
'cost' => $input['cost'][$i],
'quantity' => intval($input['quantity'][$i]),
'total_price' => (float) str_replace(',', '', $input['total_price'][$i]),
'total_cost' => (float) str_replace(',', '', $input['total_cost'][$i]),
];
Salesitems::create($items);
}
// $ponumbers = Ponumbers::create($request->only('purchase_no'));
$invnum = $request->all();
$invnumbers = new Invnumbers;
$invnumbers->sales_num = $invnum['invoice_no'];
$invnumbers->save();
if ($request){
Session::flash('message','Invoice was successfully added');
Session::flash('m-class','alert-success');
} else {
Session::flash('message','Data is not saved');
Session::flash('m-class','alert-danger');
return redirect()->route('sales.index');
}
return redirect()->route('sales.index');
}
}
My Blade
<input class="form-control autocomplete_txt product_name" type='text' data-type="product_name" id='product_name_1' name='product_name[]' for="1" readonly/>
#if ($errors->has('product_name')) <p class="help-block">{{ $errors->first('product_name') }}</p> #endif
if I submit my form with product name, instead of throwing error from validate,

Answer 1

By seeing your code, to me it seems your product_id should be an array. So the validation should be:
'product_id' => 'array|required|min:1',
'product_id.*' => 'required',
instead of
'product_id' => 'required|min:1',

Answer 2

Try to use $request->validate([... instead of $this->validate($request, [.... I'm not sure is there validate in your controller...