Undefined property while trying to connect to a laravel powered database - php

Question

I tried to create middleware to control the access of users, why I created a table roles may I have this error
Undefined property: Illuminate\Database\Eloquent\Builder::$role_name
User model
<?php
namespace App;
use Illuminate\Foundation\Auth\User as Authenticatable;
class User extends Authenticatable
{
/**
* The attributes that are mass assignable.
*
* #var array
*/
protected $fillable = [
'name', 'email', 'password',
];
/**
* The attributes that should be hidden for arrays.
*
* #var array
*/
protected $hidden = [
'password', 'remember_token',
];
public function roles(){
return $this->belongsTo('App\Role','role_id','id');
}
public function hasRole($title){
$user_role=$this->with('roles');
if(!is_null($user_role)){
$user_role=$user_role->role_name;
}
return ($user_role==$title)?true:false;
}
}
the middleware create
<?php
namespace App\Http\Middleware;
use Closure;
class create
{
/**
* Handle an incoming request.
*
* #param \Illuminate\Http\Request $request
* #param \Closure $next
* #return mixed
*/
public function handle($request, Closure $next,$Admin,$SuperAdmin)
{
$User=$request->user();
return ($User->hasRole($SuperAdmin)||$User->hasRole($Admin))?$next($request):response(view('errors.401'),401);
}
}

Answer 1

What you what to do is to receive the relation object. You can do it in this way:
public function hasRole($title){
$user_role = '';
if(!is_null($this->roles)){
$user_role=$this->roles->role_name;
}
return ($user_role==$title)?true:false;
}
The with(...) statment is useful for receiving relation when you're working on collection of elements (eager load constraint).