Undefined variable: errors -- Laravel 5.2

I am new in Laravel and using laravel version 5.2.

I created a controller and request named as ArticlesController and CreateArticleRequest respectively and i defined some validation rules.

CreateArticleRequest

<?php

namespace App\Http\Requests;

use App\Http\Requests\Request;

class CreateArticleRequest extends Request
{
    public function authorize()
    {
        return true;
    }

    public function rules()
    {
        return [
            'title' => 'required|min:3',
            'body' => 'required|max:400',
            'published_at' => 'required|date',
        ];
    }
}

ArticlesController

<?php

namespace App\Http\Controllers;

use App\Article;
//use Illuminate\Http\Request;

use App\Http\Requests;
use App\Http\Controllers\Controller;
use Carbon\Carbon;
use App\Http\Requests\CreateArticleRequest;

class ArticlesController extends Controller
{

    public function add(){
        return view('articles.add');
    }

    public function create_article_row(CreateArticleRequest $request){
        Article::create($request->all());
        return redirect('articles/');
    }
}

When i use $errors variable in my template named as add.blade.php it show error undefined variable: $errors I tried to solve the problem but i did't .Please tell me where i am wrong . add.blad.php

{{ var_dump($errors) }}

This is a breaking problem with the 5.2 upgrade. What's happening is the middleware which is responsible for making that errors variable available to all your views is not being utilized because it was moved from the global middleware to the web middleware group.

There are two ways to fix this:

1. In your kernel.php file(app/Http/Kernel.php), you can move the middleware \Illuminate\View\Middleware\ShareErrorsFromSession::class back to the protected $middleware property.

2. Wrap all your web routes with a route group and apply the web middleware to them:

   Route::group(['middleware' => 'web'], function() {
       // Place all your web routes here...(Cut all `Route` which are define in `Route file`, paste here) 
   });
   

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