How to check session in Laravel in web.php for Route::post('/url', 'controllername@methodname')

Question

I am trying to do is that if a user is not logged in and trying to enter addPost in the url in addressbar of chrome like www.siteurl/addPost and searching for it then user should redirected to LoginPage.blade.php which is in my views folder. But it throws an error : MethodNotAllowedHttpException No message I tried a lot but unable to find where I am doing wrong. Can anybody help me out. Thank you in advance.

A.This is my view(Addpost.blde.php) :

<form action="{{URL::to('/addPost')}}" method="post">
    <input type="text" name="post_title" id="post_title" />    
    <textarea name="post_description" id="post_description" ></textarea>  
    <button type="submit" name="post">Post</button>
</form>

B.This is my route(web.php) :

Route::group(['middleware' => 'checkuser'], function () {
            Route::post('/addPost', 'PostsController@addNewPost');

});
Route::get('/LoginPage', function () {
    return view('LoginPage');
});

C.This is addNewPost function in PostsController :

  public function addNewPost(Request $request){
    $userid = Session::get('id');       
     $post_title = $request->input('post_title');
     $post_description = $request->input('post_description');
$addPostintoDB = new MyPostsModel(['user_id' => $userid, 'post_title'=> $post_title, 'post_description'=> $post_description]);
    $addPostintoDB->save();
echo "post saved";
}

D.This is my custom middleware :

namespace App\Http\Middleware;
use Closure;
use Session;
class CheckUser
{
  public function handle($request, Closure $next)
  {
      if (!Session::get('id')) {
          return redirect('/LoginPage');
      }
   return $next($request);
  }
}

E.Added this to Kernel.php in the $routeMiddleware property array:

'checkuser' => \App\Http\Middleware\CheckUser::class,

Answer 1

Add this line in your web.php

Route::group(['middleware' => 'checkuser'], function () {
    Route::get('/addPost', 'PostsController@createPost');
    Route::post('/addPost', 'PostsController@addNewPost');
});

This method in your controller

public function createPost()
{
    // this is method to show your Addpost.blade.php file
    return view('Addpost');
}

And don't forget to add this inside your <form> tag

{{ csrf_field() }}