Laravel Excel Import Maatwebsite - php

Question

I found the code form this website http://itsolutionstuff.com/post/laravel-56-import-export-to-excel-and-csv-exampleexample.html
This is my route after editing:
Route::post('barang', 'BarangController#importExcel')->name('barang');
This is their Controller, and I just Adding on foreach :
public function importExcel(Request $request)
{
$request->validate([
'import_file' => 'required'
]);
$path = $request->file('import_file')->getRealPath();
$data = Excel::load($path)->get();
if($data->count()){
foreach ($data as $key => $value) {
$arr[] = [
'kode_barang' => $value->kode_barang,
'nama_barang' => $value->nama_barang,
'kategori_id' => $value->kategori_id,
'jumlah_barang' => $value->jumlah_barang,
'harga_satuan' => $value->harga_satuan,
'tanggal_inputan' => $value->tanggal_inputan,
'deskripsi' => $value->deskripsi,
'status' => $value->status,
];
}
if(!empty($arr)){
Item::insert($arr);
}
}
return back()->with('success', 'Insert Record successfully.');
}
And I Just Adding this on my View :
<form action="{{ route('barang') }}" class="form-horizontal" method="post" enctype="multipart/form-data">
#csrf
#if ($errors->any())
<div class="alert alert-danger">
×
<ul>
#foreach ($errors->all() as $error)
<li>{{ $error }}</li>
#endforeach
</ul>
</div>
#endif
#if (Session::has('success'))
<div class="alert alert-success">
×
<p>{{ Session::get('success') }}</p>
</div>
#endif
<input type="file" name="import_file" />
<button class="btn btn-primary">Import File</button>
</form>
The result show data has insert successfully, but nothing data has insert to my table.
Here my excel CSV format :
R4B6,MONITOR LENOVO,ELEKTRONIK,1,-,10/4/2018,-,Aktif
So, how to make the code right for insert into DB ?