store.php

<?php
/**
 * Store a newly created resource in storage.
 *
 * @param \Illuminate\Http\Request $request
 * @return \Illuminate\Http\Response
 */
public function store(Request $request)
{
    $nivel = new Nivel($request->input());
    $nivel->saveOrFail();
    return redirect()->route("niveles.index")->with(["mensaje" => "Nivel creado",
    ]);
}