Tugas validation( KaryawanController)

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\karyawan;
use Validator;

class KaryawanController extends Controller
{
    public function index()
    {
        //$karyawan_list = Karyawan::all()->sortBy('id');//sortir data
        $karyawan_list=Karyawan::orderBy('id','desc')->paginate(3);
        $jumlah_karyawan = $karyawan_list->count();//tampil jml data
        return view('chap8.karyawan', compact('halaman','karyawan_list','jumlah_karyawan'));
    }


    public function create()
    {
        return view('chap8.create', compact('halaman'));
    }

    public function store(Request $request)
    {
        /*$karyawan = $request->all();
        $karyawan=new \App\Karyawan;
        $karyawan->nip= $request->nip;
        $karyawan->nama= $request->nama;
        $karyawan->tgl_lahir= $request->tgl_lahir;
        $karyawan->gender= $request->gender;
        $karyawan->save();
        return redirect('karyawan');*/

        $input=$request->all();

        $validator=Validator::make($input,[
            'nip'=>'required|numeric|unique:employees,nip',
            'nama'=>'required|string|max:35',
            'tgl_lahir'=>'required|date',
            'gender'=>'required|in:L,P',
        ]);
        if($validator->fails()){
            return redirect('karyawan/create')
                        ->withInput()
                        ->withErrors($validator);
        }
        Karyawan::create($input);
        return redirect('karyawan');
    }

    public function show($id)
    {
        $karyawan=karyawan::findOrFail($id);
        return view('chap8.show',compact('halaman','karyawan'));
    }

    public function edit($id)
    {
       $karyawan=Karyawan::findOrFail($id);
       return view('chap8.edit', compact('karyawan'));
    }

    public function update(Request $request, $id)
    {
        /* $karyawan=Karyawan::findOrFail($id);
        $karyawan->update($request->all());
        return redirect('karyawan'); */
        $input=$request->all();
        $validation = Validator::make($input,[
            'nip'=>'required|string|size:5|unique:employees,nip',
            'nama'=>'required|string|max:35',
            'tgl_lahir'=>'required|date',
            'gender'=>'required|in:L,P',
        ]);
        if($validation->passes())
        {
            $karyawan = Karyawan::find($id);
            $karyawan->update($input);
            return redirect('karyawan');
        }
        return back()
            ->withInput()
            ->withErrors($validation);

    }

    public function destroy($id)
    {
        $karyawan=Karyawan::findOrFail($id);
        $karyawan->delete();
        return redirect('karyawan');
    }
    public function search(Request $request)
    {
        $cari = $request->get('search');
        $karyawan_list = Karyawan::where('nama','LIKE','%'.$cari.'%')-> orWhere ('nip','LIKE','%'.$cari.'%')->paginate(1);
        $jumlah_karyawan = $karyawan_list->count();
        return view('chap8.karyawan', compact('halaman','karyawan_list','jumlah_karyawan'));
    }
}