The issue you're facing is due to the validation code running when the page first loads. To fix this, you can check if the request method is "GET" before running the validation code. If it is not a "GET" request, then you can proceed with the validation.
Here's an updated version of your index method in the TrainingDashboardController:
public function index(Request $request)
{
if ($request->method() === 'GET') {
$request->validate([
'range_startdt' => 'required|date_format:m/d/Y H:i',
'range_enddt' => 'required|date_format:m/d/Y H:i',
]);
}
$range_startdt = $request->input('range_startdt', date('m/d/Y H:i')); // Set default value if empty
$range_enddt = $request->input('range_enddt', Carbon::parse($range_startdt)->addDays(7)->format('m/d/Y H:i'));
$ReportCount = Training::whereBetween('startdt', [Carbon::parse($range_startdt)->format('Y-m-d H:i'), Carbon::parse($range_enddt)->format('Y-m-d H:i')])->count();
return view('training.dashboard', compact('ReportCount', 'range_startdt', 'range_enddt'));
}
By checking the request method, the validation code will only run when the form is submitted (i.e., a "POST" request). This will prevent the odd behavior you're experiencing when the page first loads.
Additionally, since you're using a "GET" request for the form submission, you can keep the route as it is:
Route::get('/training/dashboard', [TrainingDashboardController::class, 'index'])->name('training.dashboard');
This way, the form submission will still be handled by the index method in the TrainingDashboardController.