users and roles tables relationship through middleware parameter laravel 5.1

im developing a user management website using laravel 5.1 and phpStorm.

users are not allowed to register but they are able to see their profiles. registration can be done only by the admin. so i have tow types of users (Admin and normal users).

im following this tutorial: https://www.youtube.com/watch?v=8AQLUZ0X9ME everything was ok till i reached to the User Model

user table:

public function up()
    {
        Schema::create('users', function (Blueprint $table) {
            $table->increments('id');
            $table->string('name');
            $table->string('email')->unique();
            $table->string('password', 60);
            $table->rememberToken();
            $table->softDeletes();
            $table->integer('role_id')->unsigned();
            $table->timestamps();
        });

Role table:

public function up()
    {
        Schema::create('roles', function (Blueprint $table) {
            $table->increments('id');
            $table->string('role_name');
            //
        });
    }

class Role extends Model
{
    protected $table = 'roles';
    protected $fillable = ['role_name'];
//
//

//    }
    public function users()
    {
        return $this->hasMany('App\User');
    }

Role Model

class Role extends Model
{
    protected $table = 'roles';
    protected $fillable = ['role_name'];
//
//

//    }
    public function users()
    {
        return $this->hasMany('App\User');
    }

User model

//default User Model 

my code 
public function role(){
        return $this->belongsTo('App\Role','role_id');
    }
    public function hasRole($title){
        $user_role = $this->role();
        if(!is_null($user_role)){
            $user_role = $user_role->role_name; //here is the problem with role_name

        }
        return ($user_role===$title)?true:false;
    }

the role_name is highlighted in yellow and it says

Field 'role_name' not found in class \Illuminate\Database\Eloquent\Relations\BelongsTo less... (Ctrl+F1) Referenced field is not found in subject class. Note: Check is not performed on objects of type "stdClass" or derived.

I created 3 middlewares Update, Create, and Delete and they all have the same handle function:

public function handle($request, Closure $next, $Admin)
    {
        $User = $request->user();
        return ($User->hasRole($Admin))?$next($request):response(view('errors.401'),401);

    }

Routes file:

Route::get('/users','UserController@index');
Route::post('/users/create',['middleware'=>'create:Admin','uses'=>'UserController@store']);
Route::patch('/users/{id}',['middleware'=>'update:Admin','uses'=>'UserController@update']);
Route::delete('/users/{id}',['middleware'=>'delete:Admin','uses'=>'UserController@destroy']);

whenever i open up the create page i got this error:

MethodNotAllowedHttpException in RouteCollection.php line 219:

I have been dealing with this code for 3 nights i need your help. if there is any easier way to achieve my goal without using packages ?

via Chebli Mohamed